Roof Underlayment
Roofing underlayment is what lies between the shingles and the roof sheathing or roof deck, its installed directly on the roof deck and provides secondary layer of protection from the elements including rain, snow & wind. Shish is specialized in providing custom Synthetic Roof Underlayment.
Our synthetic roof underlayment have number of benefits. We have developed the products in keeping with technological advancements. These products are lightweight, wider in width, and have a longer run length than asphalt-saturated felt, allows for fewer laps, cuts, and easier roll handling than felt.
The underlayment is resistant to rot, buckle, and crack. It have high slip resistance for workers on the rooftop deck. Our single underlayment sheet features a woven polymeric scrim for added strength and less slippage between the underlayment and the protective covering of the roof. During installation, a textured top surface fabric improves walking ability.
Technical Specification
| Property | Test/Method | Unit | Arkina 100 | Arkina 120 | Arkina 180 |
|---|---|---|---|---|---|
| Mechanical Properties | |||||
| Tensile Strength MD (warp) | ASTM D 5035 | Kgf | 50-55 | 78-82 | 100-105 |
| Elongation (warp) | ASTM D 5035 | % | >15 | >15 | >15 |
| Tensile Strength CD (weft) | ASTM D 5035 | Kgf | 40-45 | 60-65 | 93-97 |
| Elongation (weft) | ASTM D 5035 | % | >15 | 60-65 | 93-97 |
| Tear Strength MD | ASTM D4533 | Kgf | 23-28 | 26-31 | |
| Tear Strength CD | ASTM D4533 | Kgf | 18-23 | 24-29 | |
| Physical Properties | |||||
| Color | Upper Surface – Grey or Black (with custom print) Upper Surface – Grey | ||||
| Thickness | ASTM D 1977 | mil | 8-9 | 10-11 | 13-14 |
| Temperature Range | °F | -40°F to 240°F | -40°F to 240°F | -40°F to 240°F | |
| COF (kinetic friction) | ASTM D 1894 | 0.6 | 0.85 | 0.82 | |
| COF (static friction) | ASTM D 1895 | 1 | 0.91 | 0.98 | |
| Pliability | ASTM D 226 | PASS | PASS | PASS | |
| Fire Rating “Class A” | ASTM E 108 | PASS | PASS | PASS | |
| Durability | |||||
| UV Stabilized | Yes | ||||
