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Alpha ProTech TECHNO SB 25 Synthetic Roof Underlayment 48 in. x 250 ft. Roll, Gray
Regular price $115.00Orders start at $399 — combine any items to reach the minimum. Learn more
Alpha ProTech TECHNO SB 25 Synthetic Roof Underlayment 48 in. x 250 ft. Roll, Gray
TECHNO SB 25 is a 100% synthetic woven roof underlayment supplied as one 48 in. x 250 ft. roll in gray. It offers high tear strength, a slip-resistant back surface for safer walking and a cool grey spunbond non-woven walking surface with the AQUA TRAK System. UV resistant, it can be left exposed for up to 6 months.
Key Features:
- Slip-resistant back: Slip-resistant back side surface provides added walking traction during installation.
- AQUA TRAK surface: Cool grey spunbond non-woven walking surface features the AQUA TRAK System.
- 6-month UV exposure: UV resistant and can be left exposed for up to 6 months.
- High tear strength: 100% synthetic woven construction offers high tear strengths.
- Faster installation: Pre-printed nailing pattern and overlap lines speed installation.
- Synthetic construction: Fully synthetic woven design for residential roof underlayment.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Alpha ProTech |
| Sell unit | 1 roll, 48 in. x 250 ft. |
| Product line | TECHNO SB 25 |
| Available colors | Gray |
| Available sizes | 48 in. x 250 ft. |
| Material | 100% synthetic woven polyolefin underlayment (synthetic woven with spunbond non-woven surface) |
| Color / finish | Cool grey |
| Nominal size | 48 in. x 250 ft. |
| Dimensions | 48 in. x 250 ft. roll |
| Coverage per unit | Approx. 1,000 sq. ft. per roll before overlap deductions |
| Intended use | Residential synthetic roof underlayment beneath shingle and other roof coverings |
Coverage & How Much You Need:
One 48 in. x 250 ft. roll covers roughly 1,000 sq. ft. at full width; subtract for laps. The pre-printed overlap lines guide consistent side laps so order rolls based on roof area plus overlap waste.
Fit and Compatibility:
Installed under shingle and other roof coverings as a synthetic underlayment layer. Fasteners, cap nails and ridge/ice-water barriers are sold separately; specific shingle brand compatibility is not stated in the sources.
Frequently Asked Questions (FAQ):
Q: What is included in one roll?
A: One roll of TECHNO SB 25 measuring 48 in. x 250 ft. in gray.
Q: How much area does a roll cover?
A: A 48 in. x 250 ft. roll covers about 1,000 sq. ft. before overlap deductions; use the pre-printed overlap lines for laps.
Q: Can it be left exposed before shingling?
A: Yes — it is UV resistant and can be left exposed for up to 6 months.
Q: Is it safe to walk on?
A: It has a slip-resistant back surface and an AQUA TRAK non-woven walking surface for added traction.
Q: How is it installed?
A: Roll it out, follow the pre-printed nailing pattern and overlap lines, and fasten with compatible roofing fasteners (sold separately).
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Synthetic underlayment like SB 25 replaces felt on steep-slope jobs where tear strength and walkability matter most. Use the printed lines to keep laps consistent and cap-nail at the pattern for high-wind zones. On multi-day jobs, the 6-month UV exposure window lets you dry in an entire roof before the covering goes on.
Always follow fall-protection requirements; synthetic underlayment surfaces can still be slippery when wet or dusty.
Order Alpha ProTech TECHNO SB 25 synthetic underlayment for a safer, faster dry-in.
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