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TRI-BUILT 39.38 in. x #30 ASTM D226 Type II Asphalt Felt Underlayment Roll, Metric
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TRI-BUILT 39.38 in. x #30 ASTM D226 Type II Asphalt Felt Underlayment Roll, Metric
This TRI-BUILT #30 asphalt-saturated felt underlayment is a 39.38 in. wide metric roll that meets ASTM D226 Type II. It is sold as a roll and installs beneath shingles as a secondary water-shedding layer. Pair it with compatible drip edge and starter products for a complete roof system.
Key Features:
- ASTM D226 Type II: Manufactured to meet ASTM D 226 Type II, the standard for No. 30 asphalt-saturated organic felt.
- Metric width: 39.38 in. metric roll width for standard coverage lines.
- No. 30 weight: #30 (30 lb) felt provides a heavier, more durable underlayment layer than #15.
- Shingle underlayment: Installed under asphalt shingles and other roof coverings as a secondary layer.
- Sold by the roll: One roll per selling unit, approximately 57 lb.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | TRI-BUILT |
| Sell unit | 1 roll, 39.38 in. wide |
| Product line | Asphalt-saturated felt underlayment |
| Profile / style | #30 metric felt |
| Dimensions | 39.38 in. wide roll |
| Material | Asphalt-saturated organic felt |
| Applicable standards | ASTM D 226 Type II |
| Weight | 57 lb per roll |
| Intended use | Roof underlayment beneath shingle roofing |
Coverage & How Much You Need:
Roll length and square footage per roll are not stated in the available sources; size your job from the manufacturer's printed roll coverage on the packaging. Order rolls by roof area plus overlap allowance.
Fit and Compatibility:
Use as an underlayment layer beneath asphalt shingles or other steep-slope coverings, with drip edge and starter products per the roofing manufacturer's installation instructions.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One roll of TRI-BUILT 39.38 in. wide #30 felt underlayment meeting ASTM D226 Type II.
Q: How much area does one roll cover?
A: The sources do not state the roll length or coverage; check the roll packaging for printed square footage.
Q: What standard does it meet?
A: ASTM D 226 Type II, the specification for No. 30 asphalt-saturated organic felt.
Q: Where is it installed?
A: On the roof deck beneath the primary roof covering, lapped per the manufacturer's instructions and local code.
Q: How heavy is a roll?
A: Each roll weighs approximately 57 lb.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
No. 30 felt is the go-to choice when you want a heavier, more tear-resistant underlayment than #15, especially on longer-duration projects. Install with proper head and side laps per the roofing manufacturer and local code, and keep rolls dry before and during installation. For extended exposure periods, consider a synthetic underlayment instead.
Felt underlayment is slippery, especially when wet or dusty; use fall protection and walk carefully on installed rolls.
Get TRI-BUILT #30 metric ASTM D226 felt underlayment rolls for a dependable layer under your shingles.
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