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07190-1
SECTION 07190
WATER REPELLENT COATING
PART I - GENERAL 1.01 SUMMARY
A. Section Includes:
1. Volatile Organic Compound (VOC) compliant water-based penetrating sealer field applied to completed exterior DRY-BLOCK CMU wall construction to:
a. Further prevent intrusion of water into completed wall. b. Reduce attack from water-borne contaminants. c. Minimize the occurrence of efflorescence, mold, mildew, and algae.
B. Related Sections:
1. Section 04340 – Reinforced Unit Masonry System - Masonry substrate.
1.02 PERFORMANCE REQUIREMENTS
A. ASTM E 514, “Standard Test Method for Water Penetration and Leakage through
Masonry.” B. VOC Content: EPA Method 24. C. ASTM E 96, “Test Methods for Water Vapor Transmission of Materials.” D. Water Repellency Test – Capillary Test: “Grace Construction Products, Method 698.” E. Water Repellency Test – 63.5 mm (21⁄2 in.) Hydrostatic Head: “Grace Construction
Products, Method HU 698.” F. Accelerated Weathering: QUV (2,000 hours).
1.03 SYSTEM DESCRIPTION
A. Performance Requirements: 1. Reduce absorption of water and waterborne contaminants into substrate. 2. Permit water vapor transmittance. 3. No change to slight darkening of substrate after application.
1.04 SUBMITTALS
A. Submit under provisions of Section 01300
1. Spec-Data® Sheet on Grace Construction Products INFINISEAL DB Water-Repellent Sealer for DRY-BLOCK Admixture Wall Systems.
2. Technical Brochure on Grace Construction Products INFINISEAL DB Water-Repellent Sealer.
3. Test Report prepared by a qualified independent laboratory indicating compliance
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with the performance requirements for water-repellent sealer compatible with the integral water-repellent admixture wall system as tested using ASTM E 514, extended to 72 hours.
4. Technical data sheet indicating compliance with the performance requirements for water-repellent sealer compatible with the integral water-repellent admixture wall system as tested using: a. EPA Method 24. b. ASTM E 96. c. “Grace Construction Products Method 698.” d. “Grace Construction Products Method HU 698.” e. QUV for 2,000 hours.
5. Material Safety Data Sheets (MSDS) for water-repellent sealer maintained on project site during application period.
1.05 QUALITY ASSURANCE
A. Mockups:
1. Perform application test to 1.5 m x 1.5 m (5 ft x 5 ft) section of CMU wall surface to determine: a. Proper sealer coverage rate for type of CMU being sealed. Typical sealer
coverage rate ranges from 1.2 to 3.7 m2/L (50 to 150 ft2/gal). Where overall coverage rates are less than 1.9 m2/L (80 ft2/gal), use 2-coat application method.
b. Desired water-repellency properties. c. Desired surface appearance after sealer is fully dry.
1.06 DELIVERY, STORAGE AND HANDLING
A. Store materials in a dry area at a temperature between 40º and 100º F (0 to 38 degrees C). Provide adequate ventilation and keep away from ignition sources.
B. Do not allow water-repellent sealer to freeze; discard any frozen sealer.
1.07 PROJECT CONDITIONS
A. Environmental Requirements: 1. Do not apply water-repellent sealer when wall surface, air, and sealer temperatures
are less than 4°C (40°F) or greater than 38°C (100°F). 2. Do not apply if rain or temperatures below 40 degrees F (4 degrees C) are expected
within 6 hours after application. 3. Do not apply during winds that could carry water repellent to adjacent surfaces,
properties, or vegetation. 4. Do not apply sooner than 24 hours after surface has been exposed to rain or other
water source.
B. Substrate: 1. Cured minimum 30 days. 2. Not frozen or frost covered. 3. Clean, sound, and dry.
C. Ensure adequate ventilation in application areas.
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D. Joint sealers, paints, and glazing compounds and sealants fully cured.
1.08 SEQUENCING
A. Apply water repellents after installation of joint sealers.
1.09 WARRANTIES
A. Provide manufacturer’s 5 year material replacement warranty.
PART 2 – PRODUCTS
2.01 MANUFACTURER
A. Manufacturer:
Grace Construction Products 62 Whittemore Avenue Cambridge, MA 02140 www.graceconstruction.com
Professional Products of Kansas, Nc. www.watersealant.com
2.02 MATERIALS
A. Water Repellent Product: INFINISEAL DB Water-Repellent Sealer manufactured by Grace Construction Products.
1. Description: Specially-formulated, VOC-compliant, clear, penetrating sealer consisting of water-based blend of silanes and siloxanes to provide maximum water-repellency when post-applied to integrally water-repellent-treated CMU wall construction.
2. Water Permeance: Capable of achieving a Class E Rating when evaluated using ASTM E 514 with the test extended to 72 hours, using the rating criteria specified in ASTM E 514-74.
3. Volatile Organic Compound Content: Maximum 320 g/L. 4. Moisture Vapor Transmission Rate: Minimum 95% compared to unsealed normal
weight integral water-repellent sample using ASTM E 96. 5. Depth of Penetration: 15 mm (9⁄16 in.) to 35 mm (13⁄8 in.) depending on density of
CMU, as observed visually. 6. Water Repellency – Capillary Test: Minimum 82% reduction in water uptake versus
unsealed normal weight integral water-repellent CMU using Method 698. 7. Water Repellency – 63.5 mm (21⁄2 in.) Hydrostatic Head Pressure: Minimum 86%
reduction in water uptake versus unsealed normal weight integral water-repellent CMU using Method HU 698.
8. Accelerated Weathering: Minimal color change using QUV for 2,000 hours.
PART 3 - EXECUTION 3.01 PREPARATION
A. Surface Preparation:
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1. Ensure surface area of CMU to be treated is clean and dry, free of chemical cleaners, efflorescence, dirt, oils, mortar smears, and other surface contaminants.
2. Repoint any loose, cracked, or disintegrated mortar a minimum of 7 days before applying water-repellent sealer.
3. Ensure all joint sealants and caulking is fully cured.
B. Surrounding Area Protection:
1. Take necessary precautions to protect all areas surrounding surfaces to be treated with water-repellent sealer, including masking windows and metals, and covering plants, grass, and any other non-CMU surfaces with either polyethylene sheeting or drop cloth materials before and during sealer application.
2. Take necessary safety precautions to keep all personnel not involved in application of water-repellent sealer and pedestrians away from application area.
3. Avoid overspray by wind drift and/or improper application procedures. 3.02 APPLICATION
A. Spray Application: 1. Use low-pressure airless spray equipment fitted with fan tip between 0.6 mm
(0.025 in.) and 0.8 mm (0.035 in.). 2. Apply at lowest pressure setting that ensures continuous spray without surge. 3. Using 0.9 m to 1.2 m (3 ft to 4 ft) wide swathes, start spraying from bottom of CMU
wall and work to top of wall, avoiding spray atomization and applying sufficient material to saturate CMU wall with maximum 150 mm (6 in.) sealer rundown.
4. When necessary, apply second coat, wet-on-wet, at twice the coverage rate as first coat within one hour of first spray application, per pre-application testing to ensure proper surface saturation, coverage, and product performance.
B. Brush or Roller Application: 1. Use either nylon or other synthetic brushes or rollers resistant to alkalinity. 2. Apply water-repellent sealer to area to be treated, thoroughly saturating CMU and
avoiding excessive overlapping. 3. Cleaning:
a. Clean all equipment with hot, soapy water. b. Clean all windows or surrounding areas accidentally oversprayed on same
day of application using warm, soapy water. c. If feasible, to make cleaning easier, pretreat windows with soapy water just
prior to sealer application and clean windows immediately after sealer application, while the sealer is still wet.
d. If overspray is allowed to dry, clean surface with solvents such as mineral spirits or typical scraping methods.
3.03 FIELD QUALITY CONTROL
A. At least two weeks before starting above-grade masonry work, schedule a pre-installation conference at the jobsite in accordance with Section 01200 to discuss compliance with the requirements of the contract documents. Give two weeks advance notice to the participants,
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including the contractor, mason contractor, flashing installer, CMU producer, and/or the manufacturer of the integral water-repellent CMU admixture and sealer. Advise the architect of the scheduled meeting date.
B. Inspection: Inspect the water repellent work with the Contractor, Architect, and applicator and compare with test panel results approved by the Architect. Determine if the substrates are suitably protected by the water repellents. After coating has dried, test surfaces with water spray and Material Absorption Tube test; reapply to any areas showing water absorption.
3.04 FINAL CLEANING
A. Clean site of all unused water repellents, residues, rinse water, wastes, and effluents in accordance with environmental regulations.
B. Remove and dispose of all materials used to protect surrounding areas and non-masonry
surfaces, following completion of the work of this section. C. Repair, restore, or replace to the satisfaction of the Architect, all materials, landscaping, and
non-masonry surfaces damaged by exposure to water repellents.
END OF SECTION
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07214-1
SECTION 07214
FOAMED-IN-PLACE MASONRY WALL INSULATION
PART 1 - GENERAL
1.01 SUMMARY
A. Extent of insulation work is shown on drawings and indicated by provisions of this section.
B. Applications of insulation specified in this section include the following: 1. Foamed-In-Place masonry insulation for thermal & sound values.
1.02 RELATED REQUIREMENTS A. Section 04340 - Reinforced Unit Masonry Systems 1.03 SUBMITTALS
A. Product and technical presentation as provided by the manufacturer. 1. Certified Test Reports: With product data, submit copies of certified test
reports showing compliance with specified performance values, including R-values, fire performance and sound abatement characteristics.
2. Material Safety Data Sheet: Submit Material Safety Data Sheet complying with OSHA Hazard Communication Standard, 29 CRF 1910 1200.
1.04 QUALITY ASSURANCE
A. Manufacturing Standards: Provide insulation produced by a single and approved manufacturer. The product must come from the manufacturer pre-mixed to ensure consistency.
B. Installer Qualifications for Foamed-In-Place Masonry Insulation: Engage an experienced dealer/applicator who has been trained and licensed by the product manufacturer and which has not less than three years direct experience in the installation of the product used.
C. Warranty: Upon request, a one year product and installation warranty will be issued by both the manufacturer and installer.
D. Fire Performance Characteristics: Provide insulation materials which are identical to those whose fire performance characteristics, as listed for each material or assembly of which insulation is a part, have been determined by testing, per methods indicated below, by a testing agency acceptable to authorities having jurisdiction. 1. Product must be classified by Underwriters Laboratory ® (“UL”) as to
Surface Burning Characteristics 2. Fire Resistance Ratings: ASTM E-119 3. Surface Burning Characteristics: ASTM E-84 4. Combustion Characteristics: ASTM E-136
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PART 2 - PRODUCTS
2.01 ACCEPTABLE MANUFACTURERS
A. Manufacturers of Foamed-In-Place Masonry Insulation: Subject to compliance with requirements, provide products from the following: 1. "Core-Fill 500™"; Tailored Chemical Products, P.O. Drawer 4186,
Hickory, N.C. 28603, (800) 627-1687 2. Requests for substitutions will be considered in accordance with provisions
of Section 01 630.
2.02 INSULATING MATERIALS
A. General: Provide insulating materials which comply with requirements indicated for materials, compliance with referenced standards, and other characteristics.
B. Foamed-In-Place Masonry Insulation: Two component thermal insulation produced by combining a plastic resin and catalyst foaming agent surfactant which, when properly ratioed and mixed, together with compressed air produce a cold-setting foam insulation in the hollow cores of hollow unit masonry walls.
C. Fire-Resistance Ratings: Minimum four (4) hour fire resistance wall rating (ASTM E-119) for 8" and 12" concrete masonry units when used in standard two (2) hour rated CMUs.
D. Surface Burning Characteristics: Maximum flame spread, smoke developed and fuel contributed of 0, 5 and 0 respectively. 1. Combustion Characteristics: Must be noncombustible, Class A building material. 2. Thermal Values: "R" Value of 4.91/inch @ 32 degrees F mean; ASTM C-
177. 3. Sound Abatement: Minimum Sound Transmission Class ("STC") rating of
53 and a minimum Outdoor Indoor Transmission Class ("OITC") rating of 44 for 8" wall assembly (ASTM E 90-90).
E. Environmental Safety:
Core-Fill 500™ complies easily with all relevant codes and standards (SBBCI, BOCA, ICBO, DOE, HUD, EPA, ASTM and others). Since it contains no polystyrenes, polyisocyanurates, polyurethane or petrochemicals, it is completely safe for the environment.
PART 3 - EXECUTION
3.01 INSPECTION AND PREPARATION
A. Application Assemblies: 1. Block Walls: Exterior 8"concrete masonry units
3.02 INSTALLATION OF FOAMED-IN-PLACE INSULATION
A. General: Install foamed-in-place insulation from interior, or as specified, prior to installation of interior finish work and after all masonry and structural concrete work is in place; comply with manufacturer's instructions.
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1. Installation: Fill all open cells and voids in hollow concrete masonry walls where shown on drawings. The foam insulation shall be pressure injected through a series of 5/8" to 7/8" holes drilled into every vertical column of block cells (every 8" on center) beginning at an approximate height of four (4) feet from finished floor level. Repeat this procedure at an approximate height of ten (10) feet above the first horizontal row of holes (or as needed) until the void is completely filled. Patch holes with mortar and score to resemble existing surface.
END OF SECTION
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07220-1
SECTION 07220
ROOF AND DECK INSULATION PART 1 - GENERAL 1.01 DESCRIPTION
A. Work Specified Herein and Elsewhere 1. Work under this Section includes:
a. Board-type roof insulation. b. Cants and edge strips. c. Vapor barrier.
2. Related work specified elsewhere: a. Rough Carpentry _ Section 06100
1.02 SUBMITTALS
A. Shop Drawings and Product Data 1. Submit shop drawings and product data for the products of this and including the
following: a. Layout drawings showing slopes, thicknesses and all details.
B. Certification
1. Submit a letter certifying the following: a. The insulation is an acceptable base to the manufacturer of the roofing
specified in Section 07500. b. All materials comply with the Specifications and are suitable to be a
component of Factory Mutual Class I Construction. PART 2 - PRODUCTS 2.01 MATERIALS Polyisocyanurate Board Insulation: Rigid cellular foam, complying with ASTM C1289 2.02 MANUFACTURERS
A. Atlas Roofing Corporation: www.atlasroofing.com. B. Dow Chemical Co: www.dow.com. C. GAF Materials Corporation: www.gaf.com. D. Substitutions: See Section 01300 – Submittals.
2.03 ADHESIVE
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A. The adhesive shall be as approved by the Manufacturer. 2.04 CANT/EDGE STRIP
A. Cant/Edge Strip shall be preformed fiberboard or treated wood compatible with the insulation material, and set in adhesive or mastic, except where shown on drawings as integral metal water dam cant fascia and scupper.
2.05 FASTENERS
A. Fasteners shall be approved by the Manufacturer for intended use.
PART 3 - PRODUCTS 3.01 INSPECTION OF COMPLETED SYSTEM
A. All work must be carefully inspected for construction damage and imperfections prior to the installation of the roofing. Any holes or tears must be patched with the appropriate material. The patch must extend at least 12 inches in all directions from the edges of the tear or puncture. Seal into position with appropriate adhesive.
3.02 CLEAN-UP
A. Keep premises free from accumulation of waste material and rubbish.
END OF SECTION
07540-1
SECTION 07540
THERMOPLASTIC-POLYOLEFIN ROOFING
PART 1 - GENERAL
1.01 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.
1.02 SUMMARY
A. This Section includes the following:
1. Adhered membrane roofing system. 2. Roof insulation. 3. Vapor retarder.
B. Related Sections include the following:
1. Division 06 Section Rough Carpentry for wood nailers, curbs, and blocking. 2. Division 07 Section "Sheet Metal Flashing and Trim" for metal roof penetration
flashings, flashings, and counterflashings. 3. Division 07 Section "Joint Sealants."
1.03 DEFINITIONS
A. Roofing Terminology: Refer to ASTM D 1079 “Terminology Relating to Roofing and Waterproofing”; glossary of NRCA's "The NRCA Roofing and Waterproofing Manual"; and the Roof Consultants Institute “Glossary of Roofing Terms” for definition of terms related to roofing work in this Section.
B. Sheet Metal Terminology and Techniques: SMACNA Architectural Sheet Metal Manual.
1.04 PERFORMANCE REQUIREMENTS
A. General: Provide installed roofing membrane and flashings that remain watertight; do not permit the passage of water; and resist specified uplift pressures, thermally induced movement, and exposure to weather without failure.
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B. Material Compatibility: Provide roofing materials that are compatible with one another under conditions of service and application required, as demonstrated by roofing membrane manufacturer based on testing and field experience.
C. Jobsite Safety: Execute all operations and provide a safe work environment in accordance to OSHA standards and regulations. This requirement applies to all contractor personnel, associated subcontractors, workers in other trades, and jobsite visitors.
1. Follow all industry fire prevention guidelines for storage of materials, staging areas, roof access, and application means and methods.
2. Any applicable local fire codes supersede industry guidelines.
D. Roofing System Design: Provide a membrane roofing system that is identical to systems that have been successfully tested by a qualified testing and inspecting agency to resist uplift pressure calculated according to ASCE 7.
1. Fire/Windstorm Classification: Class 1A- 90 2. Hail Resistance: MH
1.05 SUBMITTALS
A. Product Data: For each type of product indicated.
B. Shop Drawings: For roofing system. Include plans, elevations, sections, details, and attachments to other Work.
1. Flashings and membrane terminations. 2. Tapered insulation, including slopes. 3. Insulation fastening patterns. 4. Sheet layout with perimeter and corner defined.
C. Installer Certificates: Signed by roofing system manufacturer certifying that Installer is approved, authorized, or licensed by manufacturer to install roofing system.
D. Manufacturer Certificates: Signed by roofing manufacturer certifying that roofing system complies with requirements specified in "Performance Requirements" Article.
1. Submit evidence of meeting performance requirements.
E. Qualification Data:
For Installer; contractor with 5 years of experience on similar type projects
For Manufacturer; Company with a Florida Product approved and tested systems equivalent to the product specified as a basis of design.
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F. Product Test Reports: Based on evaluation of comprehensive tests performed by manufacturer and witnessed by a qualified testing agency, for components of roofing system.
G. Research/Evaluation Reports: For components of membrane roofing system.
H. Maintenance Data: For roofing system to include in maintenance manuals.
I. Warranties: Special warranties specified in Section 1.09
1.06 QUALITY ASSURANCE
A. Installer Qualifications: A qualified firm that is approved, authorized, or licensed by roofing system manufacturer to install manufacturer's product and that is eligible to receive manufacturer's warranty.
B. Manufacturer Qualifications: A qualified manufacturer that has FMG approval for membrane roofing system identical to that used for this Project.
C. Testing Agency Qualifications: An independent testing agency with the experience and capability to conduct the testing indicated, as documented according to ASTM E 548.
D. Test Reports:
1. Roof drain and leader test or submit plumber’s verification. 2. Core cut (if requested).
E. Source Limitations: Obtain all components from single source roofing manufacturer.
F. Fire-Test-Response Characteristics: Provide membrane roofing materials with the fire-test-response characteristics indicated as determined by testing identical products per test method below by UL, FMG, or another testing and inspecting agency acceptable to authorities having jurisdiction. Materials shall be identified with appropriate markings of applicable testing and inspecting agency.
1. Exterior Fire-Test Exposure: Class A; ASTM E 108, for application and roof slopes indicated.
2. Fire-Resistance Ratings: ASTM E 119, for fire-resistance-rated roof assemblies of which roofing system is a part.
G. Preinstallation Conference: Conduct conference at Project site. Comply with requirements in Division 01 Section "Project Management and Coordination." Review methods and procedures related to roofing system including, but not limited to, the following:
1. Meet with Owner, Engineer, testing and inspecting agency representative, roofing Installer, roofing system manufacturer's representative, deck Installer, and installers
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whose work interfaces with or affects roofing including installers of roof accessories and roof-mounted equipment.
2. Review methods and procedures related to roofing installation, including manufacturer's written instructions.
3. Review and finalize construction schedule and verify availability of materials, Installer's personnel, equipment, and facilities needed to make progress and avoid delays.
4. Examine deck substrate conditions and finishes for compliance with requirements, including flatness and fastening.
5. Review structural loading limitations of roof deck during and after roofing. 6. Review Flashings, special roofing details, roof drainage, roof penetrations,
equipment curbs, and condition of other construction that will affect roofing system. 7. Review governing regulations and requirements for insurance and certificates if
applicable. 8. Review temporary protection requirements for roofing system during and after
installation. 9. Review roof observation and repair procedures after roofing installation.
1.07 DELIVERY, STORAGE, AND HANDLING
A. Deliver roofing materials to Project site in original containers with seals unbroken and labeled with manufacturer's name, product brand name and type, date of manufacture, and directions for storing and mixing with other components.
B. Store liquid materials in their original undamaged containers in a clean, dry, protected location and within the temperature range required by roofing system manufacturer. Protect stored liquid material from direct sunlight.
1. Discard and legally dispose of liquid material that cannot be applied within its stated shelf life.
C. Protect roof insulation materials from physical damage and from deterioration by sunlight, moisture, soiling, and other sources. Store in a dry location. Comply with insulation manufacturer's written instructions for handling, storing, and protecting during installation.
D. Handle and store roofing materials and place equipment in a manner to avoid permanent deflection of deck.
1.08 PROJECT CONDITIONS
A. Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit roofing system to be installed according to manufacturer's written instructions and warranty requirements.
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1.09 guarantee
A. Provide manufacturer's system guarantee equal to Johns Manville's Peak Advantage No Dollar Limit Roofing System Guarantee.
1. Single-Source special warranty includes roofing membrane, Flashings, roofing membrane accessories, roof insulation, fasteners, cover board, vapor retarder, walkway products, manufacturer’s expansion joints, manufacturer’s edge metal products, and other single-source components of roofing system marketed by the manufacturer.
2. Warranty Period: 15 years from date of Substantial Completion.
B. Installer’s Guarantee: Submit roofing Installer's warranty, on warranty form at end of this Section, signed by Installer, covering Work of this Section, including all components of roofing system such as roofing membrane, Flashing, roof insulation, fasteners, cover boards, substrate boards, vapor retarders, roof pavers, and walkway products, for the following warranty period:
1. Warranty Period: Two years from date of Substantial Completion.
PART 2 - PRODUCTS
2.01 MANUFACTURER
A. Basis of Design: Johns Manville Roofing Systems
2.02 THERMOPLASTIC POLYOLEFIN ROOFING MEMBRANE
A. Fabric-Reinforced Thermoplastic Polyolefin Sheet: ASTM D 6878, uniform, flexible sheet formed from a thermoplastic polyolefin, internally fabric or scrim reinforced. Product: JM TPO
1. Thickness: 60 mils (1.5 mm), nominal.
2.03 AUXILIARY MATERIALS
A. General: Auxiliary materials recommended by roofing system manufacturer for intended use and compatible with membrane roofing.
1. Liquid-type auxiliary materials shall meet VOC limits of authorities having jurisdiction.
B. Sheet Flashing: Manufacturer's sheet flashing of same material, type, reinforcement, thickness, and color as sheet membrane.
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C. Bonding Adhesive: Manufacturer's standard solvent based bonding adhesive for membrane, and solvent-based bonding adhesive for Flashings. Bonding adhesive and all adhesives to be asbestos free.
D. Slip Sheet: Manufacturer's recommended slip sheet, of type required for application.
E. Metal Termination Bars: Manufacturer's standard predrilled stainless-steel or aluminum bars, with anchors.
F. Metal Battens: Manufacturer's standard aluminum-zinc-alloy-coated or zinc-coated steel sheet, prepunched.
G. Miscellaneous Accessories: Provide pourable sealers, preformed cone and vent sheet flashings, preformed inside and outside corner sheet flashings, T-joint covers, termination reglets, cover strips, and other accessories
2.04 ROOF INSULATION
A. General: Provide preformed roof insulation boards that comply with requirements and referenced standards, selected from manufacturer's standard sizes and of thicknesses indicated.
B. Polyisocyanurate Board Insulation: ASTM C 1289, Type II, Product: ENRGY 3 (as a basis of design)
1. Install no boards thicker than 1.5”. If insulation package required is thicker than 1.5”, install in multiple layers.
2.05 Tapered insulation
A. Tapered Insulation: ASTM C 1289, provide factory-tapered insulation boards fabricated to slope of [1/4 inch per 12 inches (1:48)] unless otherwise indicated.
2.06 INSULATION ACCESSORIES
A. General: Roof insulation accessories recommended by insulation manufacturer for intended use and compatible with membrane roofing.
B. Provide factory preformed saddles, crickets, tapered edge strips, and other insulation shapes where indicated for sloping to drain. Fabricate to slopes indicated. Retain below if insulation package requires mechanical fastening.
C. Fasteners: Factory-coated steel fasteners and metal or plastic plates meeting corrosion-resistance provisions in FMG 4470, designed for fastening roof insulation to substrate, and provided by roofing system manufacturer.
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D. Cold Fluid-Applied Adhesive: Manufacturer's No VOC, two-component cold fluid-applied adhesive formulated to adhere roof insulation to substrate.
PART 3 - EXECUTION
3.01 EXAMINATION
A. Examine substrates, areas, and conditions, with Installer present, for compliance with the following requirements and other conditions affecting performance of roofing system:
1. Verify that roof openings and penetrations are in place and set and braced and that roof drains are securely clamped in place.
2. Verify that wood cants, blocking, curbs, and nailers are securely anchored to roof deck at penetrations and terminations and that nailers match thicknesses of insulation.
3. Verify that concrete curing compounds that will impair adhesion of roofing components to roof deck have been removed.
4. Verify that concrete substrate is visibly dry and free of moisture. Test for capillary moisture by plastic sheet method according to ASTM D 4263.
B. Proceed with installation only after unsatisfactory conditions have been corrected.
3.02 PREPARATION
A. Clean substrate of dust, debris, moisture, and other substances detrimental to roofing installation according to roofing system manufacturer's written instructions. Remove sharp projections.
B. Prevent materials from entering and clogging roof drains and conductors and from spilling or migrating onto surfaces of other construction. Remove roof-drain plugs when no work is taking place or when rain is forecast.
C. Proceed with installation only after unsatisfactory conditions have been corrected.
3.03 INSULATION INSTALLATION
A. Coordinate installing roof system components so insulation is not exposed to precipitation or left exposed at the end of the workday.
B. Comply with roofing system manufacturer's written instructions for installing roof insulation.
C. Insulation Cant Strips: Install and secure preformed 45-degree insulation cant strips at junctures of roofing membrane system with vertical surfaces or angle changes greater than 45 degrees per manufacturer’s instruction.
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D. Install tapered insulation under area of roofing to conform to slopes indicated.
E. Install insulation with long joints of insulation in a continuous straight line with end joints staggered between rows, abutting edges and ends between boards. Fill gaps exceeding 1/4 inch (6 mm) with insulation.
1. Cut and fit insulation within 1/4 inch (6 mm) of nailers, projections, and penetrations.
F. Install one or more layers of insulation under area of roofing to achieve required thickness. Where overall insulation thickness is 1.5 inches (38 mm) or greater, install 2 or more layers with joints of each succeeding layer staggered from joints of previous layer a minimum of 6 inches (150 mm) in each direction.
G. Trim surface of insulation where necessary at roof drains so completed surface is flush and does not restrict flow of water.
H. Install tapered edge strips at perimeter edges of roof that do not terminate at vertical surfaces.
I. Adhered Insulation: Install each layer of insulation and adhere to substrate as follows:
1. Set each layer in a two-part cold fluid-applied adhesive.
J. Proceed with installation only after unsatisfactory conditions have been corrected.
3.04 ADHERED ROOFING MEMBRANE INSTALLATION
A. Install roofing membrane specification ST6RA over area to receive roofing according to membrane roofing system manufacturer's written instructions. Unroll roofing membrane and allow to relax before installing.
B. Start installation of roofing membrane in presence of membrane roofing system manufacturer's technical personnel.
C. Accurately align roofing membrane and maintain uniform side and end laps of minimum dimensions required by manufacturer. Stagger end laps.
D. Bonding Adhesive: Apply water-based bonding adhesive to substrate at rate required by manufacturer and immediately install roofing membrane. Do not apply bonding adhesive to splice area of roofing membrane.
E. Mechanically fasten roofing membrane securely at terminations, penetrations, and perimeter of roofing.
F. Apply roofing membrane with side laps shingled with slope of roof deck where possible.
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G. Seams: Clean seam areas, overlap roofing membrane, and hot-air weld side and end laps of roofing membrane according to manufacturer's written instructions to ensure a watertight seam installation.
1. Test lap edges with probe to verify seam weld continuity. Apply lap sealant to seal cut edges of roofing membrane.
2. Verify field strength of seams a minimum of twice daily and repair seam sample areas.
a. Remove and repair any unsatisfactory sections before proceeding with Work.
3. Repair tears, voids, and lapped seams in roofing membrane that do not meet requirements.
H. Spread sealant or mastic bed over deck drain flange at deck drains and securely seal roofing membrane in place with clamping ring.
I. Proceed with installation only after unsatisfactory conditions have been corrected.
3.05 FLASHING INSTALLATION
A. Install sheet flashings and preformed flashing accessories and adhere to substrates according to membrane roofing system manufacturer's written instructions.
B. Apply solvent-based bonding adhesive to substrate and underside of sheet flashing at required rate and allow to partially dry. Do not apply bonding adhesive to seam area of flashing.
C. Flash penetrations and field-formed inside and outside corners with sheet flashing.
D. Clean seam areas and overlap and firmly roll sheet flashings into the adhesive. Weld side and end laps to ensure a watertight seam installation.
E. Terminate and seal top of sheet flashings and mechanically anchor to substrate through termination bars.
F. Proceed with installation only after unsatisfactory conditions have been corrected.
3.06 FIELD QUALITY CONTROL
A. Testing Agency: Owner will engage a qualified independent testing and inspecting agency to perform roof tests and inspections and to prepare test reports.
B. Final Roof Inspection: Arrange for roofing system manufacturer's technical personnel to inspect roofing installation on completion and submit report to Engineer.
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1. Notify Owner’s representative and Engineer 48 hours in advance of date and time of inspection.
C. Repair or remove and replace components of membrane roofing system where test results or inspections indicate that they do not comply with specified requirements.
D. Additional testing and inspecting, at Contractor's expense, will be performed to determine compliance of replaced or additional work with specified requirements.
3.07 PROTECTING AND CLEANING
A. Protect membrane roofing system from damage and wear during remainder of construction period. When remaining construction will not affect or endanger roofing, inspect roofing for deterioration and damage, describing its nature and extent in a written report, with copies to Engineer and Owner.
B. Correct deficiencies in or remove membrane roofing system that does not comply with requirements, repair substrates, and repair or reinstall membrane roofing system to a condition free of damage and deterioration at time of Substantial Completion and according to warranty requirements.
C. Clean overspray and spillage from adjacent construction using cleaning agents and procedures recommended by manufacturer of affected construction.
END OF SECTION
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SECTION 07620
SHEET METAL FLASHING AND TRIM
PART 1 - GENERAL
1.01 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General Conditions and Division 01 Specification Sections, apply to this Section.
1.02 SUMMARY
A. Section Includes: 1. Formed roof drainage sheet metal fabrications. 2. Formed low-slope roof sheet metal fabrications. 3. Formed wall sheet metal fabrications. 4. Formed overhead-piping safety pans.
B. Related Sections: 1. Division 06 Section "Rough Carpentry" for wood nailers, curbs, and blocking.
1.03 PERFORMANCE REQUIREMENTS
A. General: Sheet metal flashing and trim assemblies as indicated shall withstand wind loads, structural movement, thermally induced movement, and exposure to weather without failure due to defective manufacture, fabrication, installation, or other defects in construction. Completed sheet metal flashing and trim shall not rattle, leak, or loosen, and shall remain watertight.
B. Fabricate and install roof edge flashing and copings capable of resisting the following forces according to recommendations in FMG Loss Prevention Data Sheet 1-49: 1. Wind Zone 1: For velocity pressures of 21 to 30 lbf/sq. ft.: 60-lbf/sq. ft. perimeter
uplift force, 90-lbf/sq. ft. corner uplift force, and 30-lbf/sq. ft. outward force. 2. Wind Zone 2: For velocity pressures of 31 to 45 lbf/sq. ft.: 90-lbf/sq. ft. perimeter
uplift force, 120-lbf/sq. ft. corner uplift force, and 45-lbf/sq. ft. outward force. 3. Wind Zone 3: For velocity pressures of 46 to 104 lbf/sq. ft.: 208-lbf/sq. ft. perimeter
uplift force, 312-lbf/sq. ft. corner uplift force, and 104-lbf/sq. ft. outward force.
C. Thermal Movements: Provide sheet metal flashing and trim that allows for thermal movements from ambient and surface temperature changes. 1. Temperature Change (Range): 120 deg F, ambient; 180 deg F, material surfaces.
1.04 SUBMITTALS
A. Product Data: For each type of product indicated. Include construction details, material descriptions, dimensions of individual components and profiles, and finishes for each manufactured product and accessory.
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B. Shop Drawings: Show fabrication and installation layouts of sheet metal flashing and trim, including plans, elevations, and keyed details. Distinguish between shop and field-assembled work. Include the following: 1. Identification of material, thickness, weight, and finish for each item and location in
Project. 2. Details for forming sheet metal flashing and trim, including profiles, shapes, seams,
and dimensions. 3. Details for joining, supporting, and securing sheet metal flashing and trim, including
layout of fasteners, cleats, clips, and other attachments. Include pattern of seams. 4. Details of termination points and assemblies, including fixed points. 5. Details of edge conditions, including eaves, crickets and counter-flashings as
applicable. 6. Details of special conditions. 7. Details of connections to adjoining work. 8. Detail formed flashing and trim at a scale of not less than 1-1/2 inches per 12 inches.
C. Samples: For each type of exposed finish required, prepared on Samples of size indicated below: 1. Sheet Metal Flashing: 12 inches long by actual width of unit, including finished
seam and in required profile. Include fasteners, cleats, clips, closures, and other attachments.
2. Trim, Metal Closures, Joint Intersections, and Miscellaneous Fabrications: 12 inches long and in required profile. Include fasteners and other exposed accessories.
3. Accessories and Miscellaneous Materials: Full-size Sample.
D. Qualification Data: For qualified fabricator.
E. Maintenance Data: For sheet metal flashing, trim, and accessories to include in maintenance manuals.
F. Warranty: Sample of special warranty.
1.05 QUALITY ASSURANCE
A. Fabricator Qualifications: Shop that employs skilled workers who custom fabricate sheet metal flashing and trim similar to that required for this Project and whose products have a record of successful in-service performance.
B. Sheet Metal Flashing and Trim Standard: Comply with SMACNA's "Architectural Sheet Metal Manual" unless more stringent requirements are specified or shown on Drawings.
C. Preinstallation Conference: Conduct conference at Project site. 1. Meet with County, Architect, County's insurer if applicable, Installer, and installers
whose work interfaces with or affects sheet metal flashing and trim including installers of roofing materials, roof accessories, and roof-mounted equipment.
2. Review methods and procedures related to sheet metal flashing and trim. 3. Examine substrate conditions for compliance with requirements, including flatness
and attachment to structural members.
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4. Review special roof details, roof drainage, roof penetrations, equipment curbs, and condition of other construction that will affect sheet metal flashing.
5. Document proceedings, including corrective measures and actions required, and furnish copy of record to each participant.
1.06 DELIVERY, STORAGE, AND HANDLING
A. Do not store sheet metal flashing and trim materials in contact with other materials that might cause staining, denting, or other surface damage. Store sheet metal flashing and trim materials away from uncured concrete and masonry.
B. Protect strippable protective covering on sheet metal flashing and trim from exposure to sunlight and high humidity, except to the extent necessary for the period of sheet metal flashing and trim installation.
1.07 WARRANTY
A. Special Warranty on Finishes: Manufacturer's standard form in which manufacturer agrees to repair finish or replace sheet metal flashing and trim that shows evidence of deterioration of factory-applied finishes within specified warranty period. 1. Exposed Panel Finish: Deterioration includes, but is not limited to, the following:
a. Color fading more than 5 Hunter units when tested according to ASTM D 2244.
b. Chalking in excess of a No. 8 rating when tested according to ASTM D 4214. c. Cracking, checking, peeling, or failure of paint to adhere to bare metal.
2. Finish Warranty Period: 20 years from date of Substantial Completion.
PART 2 - PRODUCTS
2.01 SHEET METALS
A. General: Protect mechanical and other finishes on exposed surfaces from damage by applying a strippable, temporary protective film before shipping.
B. Zinc-Tin Alloy-Coated Stainless-Steel Sheet: ASTM A 240, Type 304, dead-soft, fully annealed stainless-steel sheet of minimum uncoated thickness indicated; coated on both sides with a zinc-tin alloy (50 percent zinc, 50 percent tin), with factory-applied gray pre-weathering.
C. Metallic-Coated Steel Sheet: Restricted flatness steel sheet, metallic coated by the hot-dip process and prepainted by the coil-coating process to comply with ASTM A 755. 1. Zinc-Coated (Galvanized) Steel Sheet: ASTM A 653, G90 coating designation;
structural quality. 2. Surface: Smooth, flat. 3. Exposed Coil-Coated Finish:
a. Two-Coat Fluoropolymer: AAMA 621. Fluoropolymer finish containing not less than 70 percent PVDF resin by weight in color coat. Prepare, pretreat, and
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apply coating to exposed metal surfaces to comply with coating and resin manufacturers' written instructions.
4. Color: Match manufactured roof panels, unless otherwise indicated on Drawings. 5. Concealed Finish: Pretreat with manufacturer's standard white or light-colored
acrylic or polyester backer finish, consisting of prime coat and wash coat with a minimum total dry film thickness of 0.5 mils.
2.02 UNDERLAYMENT MATERIALS
A. Self-Adhering, High-Temperature Sheet: Minimum 30 to 40 mils thick, consisting of slip-resisting polyethylene-film top surface laminated to layer of butyl or SBS-modified asphalt adhesive, with release-paper backing; cold applied. Provide primer when recommended by underlayment manufacturer. 1. Thermal Stability: ASTM D 1970; stable after testing at 240 deg F. 2. Low-Temperature Flexibility: ASTM D 1970; passes after testing at minus 20 deg F. 3. Products: Subject to compliance with requirements, available products that may be
incorporated into the Work include, but are not limited to, the following: a. Carlisle Coatings & Waterproofing Inc.; CCW WIP 300HT. b. Grace Construction Products, a unit of W. R. Grace & Co.; Ultra. c. Henry Company; Blueskin PE200 HT. d. Metal-Fab Manufacturing, LLC; MetShield. e. Owens Corning; WeatherLock Metal High Temperature Underlayment.
B. Slip Sheet: Building paper, 3-lb/100 sq. ft. minimum, rosin sized.
2.03 MISCELLANEOUS MATERIALS
A. General: Provide materials and types of fasteners, solder, welding rods, protective coatings, separators, sealants, and other miscellaneous items as required for complete sheet metal flashing and trim installation and recommended by manufacturer of primary sheet metal unless otherwise indicated.
B. Fasteners: Wood screws, annular threaded nails, self-tapping screws, self-locking rivets and bolts, and other suitable fasteners designed to withstand design loads and recommended by manufacturer of primary sheet metal. 1. General: Blind fasteners or self-drilling screws, gasketed, with hex-washer head.
a. Exposed Fasteners: Heads matching color of sheet metal using plastic caps or factory-applied coating.
b. Blind Fasteners: High-strength aluminum or stainless-steel rivets suitable for metal being fastened.
c. Spikes and Ferrules: Same material as gutter; with spike with ferrule matching internal gutter width.
2. Fasteners for Zinc-Coated (Galvanized) Steel Sheet: Hot-dip galvanized steel according to ASTM A 153 or ASTM F 2329 or Series 300 stainless steel.
C. Sealant Tape: Pressure-sensitive, 100 percent solids, gray polyisobutylene compound sealant tape with release-paper backing. Provide permanently elastic, non-sag, nontoxic, non-staining tape 1/2 inch wide and 1/8 inch thick.
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D. Elastomeric Sealant: ASTM C 920, elastomeric polyurethane polymer sealant; low modulus; of type, grade, class, and use classifications required to seal joints in sheet metal flashing and trim and remain watertight.
E. Butyl Sealant: ASTM C 1311, single-component, solvent-release butyl rubber sealant; polyisobutylene plasticized; heavy bodied for hooked-type expansion joints with limited movement.
F. Epoxy Seam Sealer: Two-part, non-corrosive, aluminum seam-cementing compound, recommended by aluminum manufacturer for exterior nonmoving joints, including riveted joints.
G. Bituminous Coating: Cold-applied asphalt emulsion complying with ASTM D 1187.
H. Asphalt Roofing Cement: ASTM D 4586, asbestos free, of consistency required for application.
2.04 FABRICATION, GENERAL
A. General: Custom fabricate sheet metal flashing and trim to comply with recommendations in SMACNA's "Architectural Sheet Metal Manual" that apply to design, dimensions, geometry, metal thickness, and other characteristics of item indicated. Fabricate items at the shop to greatest extent possible. 1. Fabricate sheet metal flashing and trim in thickness or weight needed to comply with
performance requirements, but not less than that specified for each application and metal.
2. Obtain field measurements for accurate fit before shop fabrication. 3. Form sheet metal flashing and trim without excessive oil canning, buckling, and tool
marks and true to line and levels indicated, with exposed edges folded back to form hems.
4. Conceal fasteners and expansion provisions where possible. Exposed fasteners are not allowed on faces exposed to view.
B. Fabrication Tolerances: Fabricate sheet metal flashing and trim that is capable of installation to a tolerance of 1/4 inch in 20 feet on slope and location lines as indicated and within 1/8-inch offset of adjoining faces and of alignment of matching profiles.
C. Sealed Joints: Form non-expansion but movable joints in metal to accommodate elastomeric sealant.
D. Expansion Provisions: Where lapped expansion provisions cannot be used, form expansion joints of intermeshing hooked flanges, not less than 1 inch deep, filled with butyl sealant concealed within joints.
E. Fabricate cleats and attachment devices from same material as accessory being anchored or from compatible, non-corrosive metal. Cleats and attachment device sizes shall be as recommended by SMACNA's "Architectural Sheet Metal Manual" for application, but not less than thickness of metal being secured.
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F. Fabricate sheet metal flashing and trim without excessive oil canning, buckling, and tool marks and true to line and levels indicated, with exposed edges folded back to form hems. 1. Seams: Fabricate nonmoving seams with flat-lock seams. Form seams and seal with
elastomeric sealant unless otherwise recommended by sealant manufacturer for intended use.
2. Seams for Aluminum: Fabricate nonmoving seams with flat-lock seams. Form seams and seal with epoxy seam sealer.
G. Do not use graphite pencils to mark metal surfaces.
2.05 LOW-SLOPE ROOF SHEET METAL FABRICATIONS
A. Roof-Edge Flashing (Gravel Stop) and Fascia Cap: Fabricate in minimum 96-inch long, but not exceeding 10-foot long, sections. Furnish with 6-inch wide, joint cover plates. 1. Joint Style: Butt, with 12-inch wide, concealed backup plate.
a. Prepainted, Metallic-Coated Steel: 0.02i7-thick.
B. Copings: Fabricate in minimum 96-inch long, but not exceeding 10-foot long, sections. Fabricate joint plates of same thickness as copings. Furnish with continuous cleats to support edge of external leg and drill elongated holes for fasteners on interior leg. Miter corners, seal, and solder or weld watertight. 1. Joint Style: Butt, with 12-inch wide, concealed backup plate.
a. Prepainted, Metallic-Coated Steel: 0.0396-thick.
C. Base Flashing: 1. Fabricate from the following materials:
a. Galvanized Steel: 0.0276 inch thick.
D. Counter-flashing and Flashing Receivers : 1. Fabricate from the following materials:
a. Galvanized Steel: 0.0217 inch thick.
E. Roof-Penetration Flashing: 1. Fabricate from the following materials:
a. Lead: 4.0 lb/sq. ft., hard tempered.
F. Roof-Drain Flashing: 1. Fabricate from the following materials:
a. Lead: 4.0 lb/sq. ft., hard tempered.
2.06 MISCELLANEOUS SHEET METAL FABRICATIONS
A. Overhead-Piping Safety Pans: 1. Fabricate from the following materials:
a. Galvanized Steel: 0.040 inch thick.
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PART 3 - EXECUTION
3.01 EXAMINATION
A. Examine substrates, areas, and conditions, with Installer present, to verify actual locations, dimensions and other conditions affecting performance of the Work. 1. Verify compliance with requirements for installation tolerances of substrates. 2. Verify that substrate is sound, dry, smooth, clean, sloped for drainage, and securely
anchored.
B. For the record, prepare written report, endorsed by Installer, listing conditions detrimental to performance of the Work.
C. Proceed with installation only after unsatisfactory conditions have been corrected.
3.02 UNDERLAYMENT INSTALLATION
A. General: Install underlayment as indicated on Drawings.
B. Self-Adhering Sheet Underlayment: Install self-adhering sheet underlayment, wrinkle free. Apply primer if required by underlayment manufacturer. Comply with temperature restrictions of underlayment manufacturer for installation; use primer rather than nails for installing underlayment at low temperatures. Apply in shingle fashion to shed water, with end laps of not less than 6 inches staggered 24 inches between courses. Overlap side edges not less than 3-1/2 inches. Roll laps with roller. Cover underlayment within 14 days.
3.03 INSTALLATION, GENERAL
A. General: Anchor sheet metal flashing and trim and other components of the Work securely in place, with provisions for thermal and structural movement. Use fasteners, solder, welding rods, protective coatings, separators, sealants, and other miscellaneous items as required to complete sheet metal flashing and trim system. 1. Install sheet metal flashing and trim true to line and levels indicated. Provide
uniform, neat seams with minimum exposure of solder, welds, and sealant. 2. Install sheet metal flashing and trim to fit substrates and to result in watertight
performance. Verify shapes and dimensions of surfaces to be covered before fabricating sheet metal.
3. Space cleats not more than 12 inches apart. Anchor each cleat with two fasteners. Bend tabs over fasteners.
4. Install exposed sheet metal flashing and trim without excessive oil canning, buckling, and tool marks.
5. Install sealant tape where indicated. 6. Torch cutting of sheet metal flashing and trim is not permitted. 7. Do not use graphite pencils to mark metal surfaces.
B. Metal Protection: Where dissimilar metals will contact each other or corrosive substrates, protect against galvanic action by painting contact surfaces with bituminous coating or by other permanent separation as recommended by SMACNA.
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1. Coat back side of uncoated aluminum sheet metal flashing and trim with bituminous coating where flashing and trim will contact wood, ferrous metal, or cementitious construction.
2. Underlayment: Where installing metal flashing directly on cementitious or wood substrates, install a course of felt underlayment and cover with a slip sheet or install a course of polyethylene sheet.
C. Expansion Provisions: Provide for thermal expansion of exposed flashing and trim. Space movement joints at a maximum of 10 feet with no joints allowed within 24 inches of corner or intersection. Where lapped expansion provisions cannot be used or would not be sufficiently watertight, form expansion joints of intermeshing hooked flanges, not less than 1 inch deep, filled with sealant concealed within joints.
D. Fastener Sizes: Use fasteners of sizes that will penetrate wood sheathing not less than 1-1/4 inches for nails and not less than 3/4 inch for wood screws and metal decking not less than recommended by fastener manufacturer to achieve maximum pull-out resistance.
E. Seal joints as shown and as required for watertight construction. 1. Where sealant-filled joints are used, embed hooked flanges of joint members not less
than 1 inch into sealant. Form joints to completely conceal sealant. When ambient temperature at time of installation is moderate, between 40 and 70 deg F, set joint members for 50 percent movement each way. Adjust setting proportionately for installation at higher ambient temperatures. Do not install sealant-type joints at temperatures below 40 deg F.
2. Prepare joints and apply sealants to comply with requirements in Division 07 Section "Joint Sealants."
F. Soldered Joints: Clean surfaces to be soldered, removing oils and foreign matter. Pre-tin edges of sheets to be soldered to a width of 1-1/2 inches, except reduce pre-tinning where pre-tinned surface would show in completed Work. 1. Do not solder aluminum sheet. 2. Pre-tinning is not required for zinc-tin alloy-coated stainless steel. 3. Do not use torches for soldering. Heat surfaces to receive solder and flow solder into
joint. Fill joint completely. Completely remove flux and spatter from exposed surfaces.
4. Stainless-Steel Soldering: Tin edges of uncoated sheets using solder recommended for stainless steel and acid flux. Promptly remove acid flux residue from metal after tinning and soldering. Comply with solder manufacturer's recommended methods for cleaning and neutralization.
G. Rivets: Rivet joints in uncoated aluminum where indicated and where necessary for strength.
3.04 ROOF FLASHING INSTALLATION
A. General: Install sheet metal flashing and trim to comply with performance requirements and SMACNA's "Architectural Sheet Metal Manual." Provide concealed fasteners where
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possible, set units true to line, and level as indicated. Install work with laps, joints, and seams that will be permanently watertight and weather resistant.
B. Roof Edge Flashing: Anchor to resist uplift and outward forces according to recommendations in SMACNA's "Architectural Sheet Metal Manual" and as indicated. Interlock bottom edge of roof edge flashing with continuous cleat anchored to substrate at staggered 3-inch centers.
C. Copings: Anchor to resist uplift and outward forces according to recommendations in SMACNA's "Architectural Sheet Metal Manual" and as indicated. 1. Interlock exterior bottom edge of coping with continuous cleat anchored to substrate
at 24-inch centers. 2. Anchor interior leg of coping with washers and screw fasteners through slotted holes
at 24-inch centers.
D. Pipe or Post Counterflashing: Install counterflashing umbrella with close-fitting collar with top edge flared for elastomeric sealant, extending a minimum of 4 inches over base flashing. Install stainless-steel draw band and tighten.
E. Counterflashing: Coordinate installation of counterflashing with installation of base flashing. Insert counterflashing in reglets or receivers and fit tightly to base flashing. Extend counterflashing 4 inches over base flashing. Lap counterflashing joints a minimum of 4 inches and bed with sealant. Secure in a waterproof manner by means of interlocking folded seam or blind rivets and sealant.
F. Roof-Penetration Flashing: Coordinate installation of roof-penetration flashing with installation of roofing and other items penetrating roof. Seal with butyl sealant and clamp flashing to pipes that penetrate roof.
3.05 WALL FLASHING INSTALLATION
A. General: Install sheet metal wall flashing to intercept and exclude penetrating moisture according to SMACNA recommendations and as indicated. Coordinate installation of wall flashing with installation of wall-opening components such as windows, doors, and louvers.
3.06 MISCELLANEOUS FLASHING INSTALLATION
A. Overhead-Piping Safety Pans: Suspend pans independent from structure above as indicated on Drawings. Pipe and install drain line to plumbing waste or drainage system.
3.07 ERECTION TOLERANCES
A. Installation Tolerances: Shim and align sheet metal flashing and trim within installed tolerance of 1/4 inch in 20 feet on slope and location lines as indicated and within 1/8-inch offset of adjoining faces and of alignment of matching profiles.
3.08 CLEANING AND PROTECTION
A. Clean and neutralize flux materials. Clean off excess solder.
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B. Clean off excess sealants.
C. Remove temporary protective coverings and strippable films as sheet metal flashing and trim are installed unless otherwise indicated in manufacturer's written installation instructions. On completion of installation, remove unused materials and clean finished surfaces. Maintain in a clean condition during construction.
D. Replace sheet metal flashing and trim that have been damaged or that have deteriorated beyond successful repair by finish touchup or similar minor repair procedures.
END OF SECTION
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SECTION 07900
JOINT SEALANTS
PART 1 – GENERAL 1.01 SECTION INCLUDES
A. Sealants and joint backing.
1.02 REFERENCES
A. ASTM C 919 - Standard Practice for Use of Sealants in Acoustical Applications; 2008.
B. ASTM C 920 - Standard Specification for Elastomeric Joint Sealants; 2010.
C. ASTM C 1193 - Standard Guide for Use of Joint Sealants; 2009. 1.03 SUBMITTALS
A. See Section 01600 - Product Requirements, for submittal procedures.
B. Product Data: Provide data indicating sealant chemical characteristics.
C. Manufacturer's Installation Instructions: Indicate special procedures. 1.05 QUALITY ASSURANCE
A. Maintain one copy of each referenced document covering installation requirements on site.
B. Applicator Qualifications: Company specializing in performing the work of this section with minimum 3 years’ experience.
1.06 ENVIRONMENTAL REQUIREMENTS
A. Maintain temperature and humidity recommended by the sealant manufacturer during and after installation.
1.07 COORDINATION
A. Coordinate the work with all sections referencing this section. 1.08 WARRANTY
A. Correct defective work within a five year period after Date of Substantial Completion.
B. Warranty: Include coverage for installed sealants and accessories which fail to achieve airtight seal, exhibit loss of adhesion or cohesion, or do not cure.
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PART 2 - PRODUCTS
2.01 MANUFACTURERS
A. Polyurethane Sealants: 1. Bostik, Inc: www.bostik-us.com. 2. Pecora Corporation: www.pecora.com. 3. BASF Construction Chemicals, Inc: www.chemrex.com.
B. Polysulfide Sealants: 1. Pecora Corporation: www.pecora.com. 2. BASF Construction Chemicals, Inc: www.chemrex.com.
C. Acrylic Sealants: 1. Tremco, Inc: www.tremcosealants.com.
2.02 SEALANTS
A. Sealants and Primers - General: Provide only products having lower volatile organic compound (VOC) content than required by South Coast Air Quality Management District Rule No.1168.
B. Type 2 - General Purpose Exterior Sealant for joints in vertical and sloping surfaces; Polyurethane and Polysulfide; single component. 1. Color: Standard colors matching finishing surfaces.
C. Type 1; self-leveling - General Purpose Exterior Sealant for joints on horizontal surfaces; Polyurethane and Polysulfide; single component. 1. Color: Standard colors matching finished surfaces.
2.03 ACCESSORIES
A. Primer: Non-staining type, recommended by sealant manufacturer to suit application.
B. Joint Backing: Round foam rod compatible with sealant; ASTM D 1667, closed cell PVC; oversized 25 to 50 percent larger than joint width.
C. Bond Breaker: Pressure sensitive tape recommended by sealant manufacturer to suit application.
PART 3 - EXECUTION
3.01 EXAMINATION
A. Verify that substrate surfaces are ready to receive work.
B. Verify that joint backing and release tapes are compatible with sealant. 3.02 PREPARATION
A. Remove loose materials and foreign matter which might impair adhesion of sealant.
B. Clean and prime joints in accordance with manufacturer's instructions.
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C. Perform preparation in accordance with manufacturer's instructions and ASTM C 1193.
D. Protect elements surrounding the work of this section from damage or disfigurement. 3.03 INSTALLATION
A. Perform work in accordance with sealant manufacturer's requirements for preparation of surfaces and material installation instructions.
B. Perform installation in accordance with ASTM C 1193.
C. Perform acoustical sealant application work in accordance with ASTM C 919.
D. Install bond breaker where joint backing is not used.
E. Install sealant free of air pockets, foreign embedded matter, ridges, and sags.
F. Apply sealant within recommended application temperature ranges. Consult manufacturer when sealant cannot be applied within these temperature ranges.
3.04 CLEANING
A. Clean adjacent soiled surfaces. 3.05 PROTECTION OF FINISHED WORK
A. Protect sealants until cured.
END OF SECTION
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