All commercial (low slope) roof systems use “membrane” roofing products. Low slope roofs are waterproof as they are subject to ponding water. (Steep slope roofs use either shingles or metal, and are designed to repel water as opposed to being "waterproof".)

Modified bitumen roofing was developed to replace built-up roofing. Built-up roofing consisted of alternating layers of reinforcement and bitumen, a sticky form of asphalt,applied to the roof on the jobsite. Although it still requires some on-site handling, modified butimen roofing eliminates much of the labor and materials involved with traditional built-up roofing.

Modifed bitumen roofing membranes consist of polyester, asphalt, and a modifier to give the asphalt volume and flexibility. Modified bitumen roof systems account for the majority of low slope commercial roof systems in the country. Modified bitumen roof systems are tough and redundant, equating to superior, reliable performance.

The first roof layer consists of a base sheet (either mechanically fastened or in asphalt), with the second layer consisting of a modified membrane. Additional layers of base sheet and/or membrane may be applied depending upon the project. Final layer should always consist of modified roofing membrane.

®Grip-Rite modified bitumen roofing membranes are manufactured from formulas using only the highest quality materials, and meet or exceed industry standards for standard performance modified bitumen membranes.

®Grip-Rite Fiberglass Base Sheet

General commercial (low slope) roofing information

Grip-Rite® roofing membranes are distributed by PrimeSource Building Products, Inc.

© 2011 PrimeSource Building Products, Inc.

ROOFING MEMBRANEROOFING MEMBRANE

SKU Function Roll Size Weight per Roll

ASTM

GRBASE Base Sheet

3 Squares 72 lb. D-4601-04 Type I/II

þfor use with all Grip-Rite® SBS and APP roofing membranes

800-676-7777www.grip-rite.comwww.primesourcebp.com

Irving, Texas 75038 USA

BUILDING PRODUCTS, INC.

GRRMBRO05/2011

®Grip-Rite APP Roofing Membrane Cap SheetApplication: Torch welding

Material Requirements

Available Colors Available Colors

Color: Smooth (none)SKU: GRAPP160S

Material Requirements

Color: WhiteSKU: GRSBSMWHT

Color: WhiteSKU: GRAPPMWHT

Color: BlackSKU: GRSBSMBLK

Color: BlackSKU: GRAPPMBLK

Color: Cedar BlendSKU: GRSBSMCBL

Color: Cedar BlendSKU: GRAPPMCBL

Color: TanSKU: GRSBSMTAN

Color: TanSKU: GRAPPMTAN

Color: WeatherwoodSKU: GRSBSMWW

Color: WeatherwoodSKU: GRAPPMWW

®Grip-Rite SBS Roofing Membrane Cap SheetApplication: Mop adhesive

ROOFING MEMBRANEROOFING MEMBRANE

SBS (styrene-butadiene-styrene) membranes

modified with rubber, applied with hot asphalt or cold adhesive

designed for use in cooler climates, as the membrane retains its flexibility in lower temperatures

þþ

APP (atactic polypropylene) membranes

modified with plastic, applied with a torch

designed for use in warmer climates

þþ

Composition Type Requirement Method Application Rate

Approved Substrate

Follow substrate requirements for preparation

Base SheetGrip-Rite® Fiberglass Base Sheet

One (1) Layer

Mechanical fasteners or hot asphalt applied as applicable for substrate type

Per project specification

MembraneGrip-Rite® SBS Roofing Membrane

One (1) Layer

Hot asphalt applied or SBS adhesive applied as applicable to specifications

Per project specification

Flashing Membrane

Grip-Rite® Fiberglass Base Sheet

One (1) LayerMechanical fasteners or hot asphalt

Fully adhered

Grip-Rite® SBS Roofing Membrane

One (1) Layer

Hot asphalt or adhesive applied as applicable to specifications

Composition Type Requirement Method Application Rate

Approved Substrate

Follow substrate requirements for preparation

Base SheetGrip-Rite® Fiberglass Base Sheet

One (1) Layer (if applicable)

Mechanical fasteners as applicable for substrate type

Per project specification

Interply Sheet

Grip-Rite® Smooth APP Roofing Membrane

One (1) Layer Torch appliedFully adhered

Membrane

Grip-Rite® Granulated APP Roofing Membrane

One (1) Layer Torch appliedFully adhered

Flashing Membrane

Grip-Rite® Smooth APP Roofing Membrane

One (1) Layer

Torch appliedFully adhered

Grip-Rite® Granulated APP Roofing Membrane

One (1) Layer

Thickness Reinforcement Function Roll Size Weight per Roll

ASTM

3.80 mm Polyester Cap 1 Square (3 ft. x 32.8 ft.)

98 lb. D-6164 Type I, Grade G

Thickness Reinforcement Function Roll Size Weight per Roll

ASTM

3.50 mm Polyester Base / Interply /

Cap

1 Square (3 ft. x 32.8 ft.)

84 lb. D-6222 Type I, Grade S

4.00 mm Polyester Cap 1 Square (3 ft. x 32.8 ft.)

102 lb. D-6222 Type I, Grade G