Toughskin
® 20 underlayment is a mechanically attached synthetic underlayment comprised of a cross-woven polymeric base scrim laminated onto a non-woven scrim and a polymer coating on the back side. The underlayment has a nominal weight of 2.25 lbs. per 100 square feet, and it is available in rolls measuring 48 inches wide by 250 feet long. Custom size of the rolls is also available.
FIRE CLASSIFICATION
Class A
| Assembly No. |
E108-RFU-61514 |
| Slope |
2:12 (Minimum) |
| Deck Type |
Combustible |
| Details |
- Minimum nominal 3/8 in. thick Code Compliant exterior grade plywood
- A single layer of Toughskin® 20 underlayment mechanically fastened to the plywood every 18" oc using T50 staples
- 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
| Evaluation Method |
Building Codes |
CCRR Number |
ASTM D8257
ICC-ES AC188 |
2024, 2021, and 2018 IBC
2024, 2021, and 2018 IRC
2023 and 2020 FBC |
CCRR-0407 |
