Secure Start™ HT is a self-adhered synthetic underlayment comprised of a modified bitumen membrane as the adhesive material on the sheathing side and a synthetic facer on the exposure side. The nominal weight of the underlayment is 19.3 pounds per 100 square feet and it is available in rolls measuring 36.75 inches wide and 66 feet long.
FIRE CLASSIFICATION
Class A Assemblies
Assembly No. |
E108-RFU-64349 |
Slope:
Deck Type:
Details: |
2:12 or greater
Combustible
- Minimum nominal 3/8” thick Type AC grade plywood
- A single layer of Secure Start™ HT underlayment self-adhered to the plywood sheathing
- 3-tab asphalt shingles Listed per ASTM D3462 with a minimum weight of 190 pounds per 100 square feet, mechanically fastened with 1-1/2 inch roofing nails through nailing strip, (4) per shingle
|
CODE COMPLIANCE RESEARCH REPORT
Evaluation Method |
Building Code |
CCRR No. |
ASTM D1970
ICC-ES AC188 |
2024, 2021, 2018 IBC
2024, 2021, 2018 IRC
2023 FBC |
CCRR-0423 |
The underlayment is also under Intertek's QA program for the following application:
Product |
FL Application No. |
Secure Start™ HT |
FL 41901 |