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:

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.