FOUNDATIONS R506.2.3 Vapor Retarder

6 mil poly or approved vapor retarder* lapped 6” placed between the slab and the base course.

Exceptions:• Unheated accessory structures• Unheated storage room <70 sf and carports• Flatwork not likely to be enclosed and heated• Where approved by the building official

* Visqueen, Polyethelyne SheetingIRC 2009WHAT BUILDERS NEED TO KNOWKEY POINTS OF THENEW RESIDENTIAL CODE

WEATHER RESISTANT BARRIER R703 and Table 703.4 Weather Resistant Exterior Covering

Both wind and water resistance for exterior wall covering systems recognized.

R703.1.1 Water Design and construction preventing water intrusion into the wall assembly thru a water-resistant barrier behind exterior veneer and a means for draining water to the exterior (this is not new).Water resistive barrier behind “anchored veneer” with 1” air space is now mandatory. (brick, concrete, masonry and stone)

WEATHER RESISTANT BARRIER R703.1.2 Wind Resistance

“Wall coverings, backing materials and their attachments shall be capable of resisting wind loads in accordance with Tables R301.2(2) and R301.2(3).”

When determined by design analysis, approved design standards meeting engineering practice used to evaluate the sidings.

R703.1.2 and Table 703.4 Wind: resistance according to Tables R301.2(2) and R301.2(3) and ASTM E330.

New fastening requirements for siding to meet manufacturer’s recommendations and test reports.

WEATHER RESISTANT BARRIER No water resistant barrier here!…

IRC 703.2 says there should be!

Incorrect Installation

WEEP HOLES

R703.7.6 Weep holes

Provided at a maximum spacing of 33” on center.

Shall not be less than 3/16” in diameter.

Shall be located immediately above the flashing. See Figure R703.7.

EQUIPMENT SIZING

N1103.6 Equipment SizingHeating and cooling equipment shall be sized as specified in Section M1401.3.

All buildings must have load calculations performed.

M1401.3 SizingHVAC system sized according to ACCA Manual S based on load calculations from ACCA Manual J (Version 8 is the latest version)

LIGHTING SYSTEMS

N1104 Lighting Systems (addition)

50% of permanently installed lighting fixtures required to be CFLs or other high-efficacy lamps.

Comment: Can or recessed lighting are exempt in Oklahoma.

ATTIC ACCESS HATCHES

N1102.2 Ceiling and Access Hatch Insulation Requirements (clarification)

Access doors to unconditioned space will be weatherstripped and insulated to same R-value as the ceiling.

Insulation baffle installed at edges to prevent spilling into the living space and maintain the installed R-value.

ATTIC RULERS

N1101.4 Blown or Sprayed Roof/Ceiling Insulation

Markers installed 1 for every 300sf with numbers at least 1” tall to help determine the depth of the installed insulation.

Stickers must face the attic access opening.

ATTIC VENTILATION

All Cavities in attic to be ventilated

AIR BARRIER INSPECTION

Table N1102.4.2 Air Barrier and Insulation Inspection

ENERGY CODE COMPLIANCE METHODS

THREE ENERGY COMPLIANCE

METHODS

1. PERSCRIPTIVE

ENERGY CODE COMPLIANCE METHODS

Comment: U-factor = 1/R. Windows rated by U-factor.

Insulation rated by R-factor

ENERGY CODE COMPLIANCE METHODS

THREE ENERGY COMPLIANCE

METHODS

2. U-FACTOR ANDUA ALTERNATIVES

U-factor from Table N1102.1.2 shall be allowed instead of the R-values from Table N1102.1.

ENERGY CODE COMPLIANCE METHODS

N1102.4.2.1 Testing option.

Tested air leakage is less than 7 ACH when tested with a blower door at a pressure of 50 pascals (0.007 psi).

THREE ENERGY COMPLIANCE

METHODS

3. PERFORMANCE

Testing shall occur after rough in and after installation of penetrations of the building envelope, including penetrations for utilities, plumbing, electrical, ventilation and combustion appliances.

BRACING DIAGRAMS

“Bracing Diagrams to appear on plans”

R106.1.1 Information on construction documents.

Construction documents shall be drawn upon suitable material.Electronic media documents are permitted to be submitted when approved by the building official. Construction documents shall be of sufficient clarity to indicate the location, nature and extent of the work proposed and show in detail that it will conform to the provisions of this code and relevant laws, ordinances, rules and regulations, as determined by the building official. Where required by the building official, all braced wall lines, shall be identified on the construction documents and all pertinent information including, but not limited to, bracing methods, location and length of braced wall panels, foundation requirements of braced wall panels at top and bottom shall be provided.

INCENTIVES

Oklahoma State Tax Credit

Utility Rebate Programs

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INCENTIVES

For more information on these green building programs contact Andrea Palmer 888-488-0206 apalmer@gwssi.com

www.nahbgreen.org

www.energystar.gov www.epa.gov/indoorplus

www.usgbc.org/homes