SYNSTEP L340, SYNSTEP S360, SYNSTEP G380, SYNSTEP 100, SYNSTEP T440, SYNSTEP V480, SYNSTEP R600, SYNSTEP U640, SYNSTEP PRO 720, and SYNSTEP MAX960 are mechanically attached, four-layered synthetic roofing underlayments comprised of a non-woven fabric on the exposed side, a polymeric laminate/bonding layer, a woven polypropylene base, and a polymeric laminate/coating layer on the sheathing side. They have nominal weights of 1.74, 1.84, 1.95, 2.05, 2.25, 2.46, 3.07, 3.28, 3.69, and 4.92 pounds per 100 square feet, respectively. The standard roll size is 4 feet wide by 250 feet long, or as required. These are also available in different colors as required.
PHYSICAL RATINGS
| PRODUCT |
TEST METHOD |
TEST PROCEDURE |
RESULTS |
| SYNSTEP L340, SYNSTEP S360, SYNSTEP G380, SYNSTEP 100, SYNSTEP T440, SYNSTEP V480, SYNSTEP R600, SYNSTEP U640, SYNSTEP PRO 720, and SYNSTEP MAX960 Roofing Underlayments |
ASTM D226 |
Unrollability |
Meets Type II |
| Breaking Strength |
Meets Type II |
| Pliability |
Meets Type II |
| Loss on Heating |
Meets Type II |
| CAN/CSA A123.3 |
Unrollability |
Meets Type III |
| Breaking Strength |
Meets Type III |
| Pliability |
Meets Type III |
| Loss on Heating |
Meets Type III |
| Water Shower Exposure |
Meets Type III |
FIRE CLASSIFICATION
CLASS A Assemblies
| ASSEMBLY NO. |
E108-RFU-79855 |
| Slope: |
2:12 (min.) |
| Deck Type: |
Combustible |
| Details: |
- Minimum nominal 3/8 in. thick code compliant exterior grade plywood
- Single layer of SYNSTEP L340, SYNSTEP S360, SYNSTEP G380, SYNSTEP 100, SYNSTEP T440, SYNSTEP V480, SYNSTEP R600, SYNSTEP U640, SYNSTEP PRO 720, or SYNSTEP MAX960 underlayment mechanically fastened to the plywood every 12 in. oc using 1 in. cap nails. Underlayment horizontal joints overlapped by 4 in.
- 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 CODE |
CCRR NUMBER |
ASTM D8257
ICC-ES AC188 |
2024, 2021, 2018 IBC
2024, 2021, 2018 IRC
2023 FBC |
CCRR-0549 |
FLORIDA PRODUCT APPROVAL
| Report No. |
Product Covered |
| FL No. 46899 |
SYNSTEP L340, SYNSTEP S360, SYNSTEP G380, SYNSTEP 100, SYNSTEP T440, SYNSTEP V480, SYNSTEP R600, SYNSTEP U640, SYNSTEP PRO 720, and SYNSTEP MAX960 Synthetic Roofing Underlayments |
