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| General commercial |
| (low slope) roofing information |
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| All commercial (low slope) roof systems use "membrane" roofing products. Low slope roofs are
waterproof os 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".) |
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| 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. |
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| Modified 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 the superior, reliable performance |
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| The first roof layer consists of a base sheet (either mechanically fastened of 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. |
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| SB'S (styrene-butadiene-styrene) membranes |
- modified with rubber, applied with how asphalt of cold adhesive
- designed for use in cooler climates, as the membrane retains its flexibility in lower temperatures
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| Grip-Rite® modified bitumen membranes are manufactured from formulas using only the highest
quality materials, and meet or exceed, industry standards for standard performance modified
bitumen membranes. |
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| Grip-Rite® |
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| SKU |
Function |
Roll Size |
Weight |
ASTM |
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per Roll |
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| GRASSED |
Base Sheet |
3 Squares (3ft.x108ft.) |
72 lb. |
D4601-04 Type-1 |
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| Grip-Rite® Roofing Membrane Cap Sheet |
| Application: Mop adhesive |
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| Thickness |
Reinforcement |
Function |
Roll Size |
Weight |
ASTM |
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per Roll |
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| 3.80 mm |
polyester |
Cap |
1 Square
(3ft.x32.8ft.) |
98 lb. |
D6164 Type 1, Grade G |
| Material Requirements |
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| Composition |
Type |
Requirement |
Method |
Application |
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Rate |
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| Approved Substrate |
Follow substrate requirements for preparation. |
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| Base Sheet |
Grip-Rite® Fiberglass Base Sheet |
One(1) Layer |
Mechanical fasteners or hot asphalt applied as applicable for substrate type |
Per Project specification |
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| Membrane |
Grip-Rite® SBS Roofing Membrane |
One(1) Layer |
Hot asphalt applied or SBS adhesive applied as applicable
to specifications |
Per Project specification |
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| Flashing Membrane |
Grip-Rite® Fiberglass Base Sheet |
One(1) Layer |
Mechanical fasteners or hot asphalt |
Fully adhered |
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Grip-Rite® SBS Roofing Membrane |
One(1) Layer |
Hot asphalt or adhesive applied as applicable to specifications |
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| Grip-Rite® APP Roofing Membrane Cap Sheet |
| Application: Torch welding |
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| Thickness |
Reinforcement |
Function |
Roll Size |
Weight |
ASTM |
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per Roll |
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| 3.80 mm |
polyester |
Base/ Interply/ Cap |
1 Square
(3ft.x32.8ft.) |
84 lb. |
D6222 Type 1, S |
| 4.00 mm |
polyester |
Cap |
1 Square
(3ft.x32.8ft.) |
102 lb. |
D6222 Type 1, G |
| Material Requirements |
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| Composition |
Type |
Requirement |
Method |
Application |
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Rate |
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| Approved Substrate |
Follow substrate requirements for preparation. |
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| Base Sheet |
Grip-Rite® Fiberglass Base Sheet |
One(1) Layer |
Mechanical fasteners as applicable for substrate type |
Per Project specification |
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| Interply |
Grip-Rite® Smooth APP Roofing Membrane |
One(1) Layer |
Torch applied |
Fully adhered |
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| Membrane |
Grip-Rite® Granulated APP Roofing Membrane |
One(1) Layer |
Torch applied |
Fully adhered |
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| Flashing Membrane |
Grip-Rite® Smooth APP Roofing Membrane |
One(1) Layer |
Torch applied |
Fully adhered |
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Grip-Rite® Granulated APP Roofing Membrane |
One(1) Layer |
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