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Atlas Summit 180 Synthetic Roof Underlayment, 48 in. x 250 ft. Polypropylene Roll
Regular price $140.00Orders start at $399 — combine any items to reach the minimum. Learn more
Atlas Summit 180 Synthetic Roof Underlayment, 48 in. x 250 ft. Polypropylene Roll
Atlas Summit 180 is a premium synthetic roof underlayment, 48 in. x 250 ft. per roll, made from strong polypropylene woven fabric. Stronger and lighter than #30 felt, it suits virtually all steep-slope roofs, resists water, mold and rot, and allows 180 days of UV exposure during installation. One roll is the sell unit.
Key Features:
- Stronger than #30 felt: Synthetic construction is stronger and lighter than #30 felt underlayment.
- 180-day UV exposure: A UV coating allows 180-day exposure to the sun while the roof is being installed.
- Slip-resistant surface: Slip-resistant polymer applied to the bottom surface gives superior walkability.
- Water resistance: Polypropylene woven fabric guards against water damage, mold growth and rot.
- Steep-slope versatility: Ideal for use in virtually all steep-slope roof applications.
- Improved walkability: Non-woven face improves footing for crews during installation.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Atlas |
| Sell unit | 1 roll, 48 in. x 250 ft. |
| Product line | Atlas Summit 180 Synthetic Underlayment |
| Available sizes | 48 in. x 250 ft. roll |
| Material | Polypropylene woven fabric |
| Dimensions | 48 in. x 250 ft. |
| Coverage per unit | Approx. 1,000 sq. ft. per roll |
| UV exposure rating | 180 days |
| Finish / texture | Non-woven face, slip-resistant polymer bottom surface |
| Intended use | Underlayment for steep-slope roofs |
Coverage & How Much You Need:
A 48 in. x 250 ft. roll covers about 1,000 sq. ft. at full width. Factor in the required head and side laps on your roof pitch when estimating rolls per job.
Fit and Compatibility:
Installed beneath shingles and other steep-slope roof coverings as a premium alternative to #30 felt. Shingles, ridge venting and fasteners are sold separately.
Frequently Asked Questions (FAQ):
Q: What is included in one roll?
A: One 48 in. x 250 ft. roll of Summit 180 synthetic underlayment.
Q: How much does one roll cover?
A: A full 48 in. x 250 ft. roll provides about 1,000 sq. ft. before lap deductions.
Q: How long can it be exposed to sun?
A: The UV coating allows 180 days of exposure while the roof is being completed.
Q: Is it safer to walk on than felt?
A: Yes, a slip-resistant polymer on the bottom surface and a non-woven face provide superior walkability.
Q: How does it compare to #30 felt?
A: It is stronger and lighter than #30 felt underlayment.
Q: Will it grow mold or rot?
A: The polypropylene woven fabric guards against mold growth, rot and water damage.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Summit 180 fits steep-slope jobs where the roof may sit partially completed for weeks, since the 180-day UV rating removes the felt exposure clock. The slip-resistant coating is a real productivity and safety benefit on steeper pitches. On low-slope decks, choose a self-adhered membrane instead, as this underlayment is intended for steep-slope use.
Synthetic underlayment can be slippery, especially when wet or dusty; wear slip-resistant footwear and use fall protection.
Buy Atlas Summit 180 Synthetic Underlayment for stronger, lighter steep-slope roof protection with 180-day UV rating.
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