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TRI-BUILT 15# Asphalt Felt Underlayment, 36 in. Roll, ASTM D-226
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TRI-BUILT 15# Asphalt Felt Underlayment, 36 in. Roll, ASTM D-226
TRI-BUILT 15# organic felt underlayment is a 36 in. wide roll of roofing felt that meets ASTM D 226. Sold per roll at 52 lb, it installs under asphalt shingles as a secondary water-shedding layer. Use with shingles, starter and drip edge in a standard steep-slope roof assembly.
Key Features:
- ASTM D 226: Meets ASTM D 226, the standard specification for asphalt-saturated organic felt underlayment.
- 36 in. width: 36 in. roll width suited to standard shingle course layout.
- 15# felt weight: Traditional 15-pound felt for residential steep-slope roofing.
- Per-roll unit: Sold per roll, approximately 52 lb each for job estimating.
- Secondary protection: Provides a water-shedding layer beneath shingles.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | TRI-BUILT |
| Sell unit | 1 roll |
| Product line | TRI-BUILT roofing felt underlayment |
| Dimensions | 36 in. roll width |
| Weight | 52 lb per roll |
| Material | Asphalt-saturated felt |
| Approvals | ASTM D 226 |
| Intended use | Roofing underlayment beneath shingles |
Coverage & How Much You Need:
Roll length is not stated in the sources; traditional 15# felt in 36 in. width is commonly supplied in 432 sq ft (144 ft x 36 in.) rolls, but confirm before ordering and allow for laps.
Fit and Compatibility:
Used under asphalt shingles and other steep-slope coverings; pair with TRI-BUILT drip edge and underlayment products in the same roof system.
Frequently Asked Questions (FAQ):
Q: What is included in one order?
A: One 36 in. roll of TRI-BUILT 15# felt underlayment meeting ASTM D 226.
Q: What standard does it meet?
A: ASTM D 226, the specification for asphalt-saturated organic felt used as roofing underlayment.
Q: How do I size the job?
A: Roll length is not published in our sources; traditional 15# 36 in. rolls are typically 432 sq ft, so confirm and add for lap overlap.
Q: How is it installed?
A: Horizontally over the deck with laps per the manufacturer's instructions and local code, before shingles are applied.
Q: How much does a roll weigh?
A: Approximately 52 lb.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Fifteen-pound felt remains a workhorse underlayment for standard residential slopes. Lap horizontal courses at least 2 in. and end laps 4 in., following manufacturer instructions and local code. For valleys, eaves and low-slope sections, upgrade to a self-adhering membrane for added protection.
Felt underlayment can be slippery, especially when wet or dusty; wear appropriate footwear and fall protection while installing.
Order TRI-BUILT 15# felt underlayment, ASTM D-226, for a dependable layer under your next shingle roof.
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