Tremco SA is a 3-layered self-adhered underlayment comprised of a non-woven polypropylene fabric on the exposed side, a modified bitumen adhesive layer, and a silicone release film. It is available in four diffierent thicknesses of 40 mils, 45 mils, 48 mils, and 60 mils having nominal thicknesses of 21.71, 22.43, 22.73, and 24.58 pounds per 100 square feet. The underlayment measures 3 ft. wide by 67 ft. long and is available in grey and white color. Tremco SA may also be labeled as Vulkem HT.
FIRE CLASSIFICATION
Class A Assemblies
| Assembly No. |
E108-RFU-76942 |
| Slope: |
2:12 or greater |
| Deck Type: |
Combustible |
| Details: |
- Minimum nominal 15/32” thick Code Compliant exterior grade plywood
- A single layer of Tremco SA or Vulkem HT roofing underlayment installed using the products peel and stick backing
- Asphalt shingles Listed per ASTM D3462 with a minimum weight of 190 pounds per 100 square feet installed per manufacturer’s installation instructions
|
CODE COMPLIANCE RESEARCH REPORT
| Product |
Evaluation Method |
Building Code |
CCRR Number |
| Tremco SA |
ASTM D1970 |
2024, 2021, and 2018 IBC
2024, 2021, and 2018 IRC
2023 FBC |
CCRR-0528 |
| Vulkem HT |
