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Generic 30# ASTM D226 Asphalt Saturated Organic Felt Underlayment, 36 in. 2 Square Roll
Regular price $41.62Orders start at $399 — combine any items to reach the minimum. Learn more
Generic 30# ASTM D226 Asphalt Saturated Organic Felt Underlayment, 36 in. 2 Square Roll
This 30# asphalt-saturated felt underlayment meets ASTM D226 and comes on a 36 in. roll covering 2 squares. It provides a waterproofed separator layer beneath shingles on residential roofs. One roll is included per order.
Key Features:
- ASTM D226: Manufactured to meet ASTM D226, the standard for asphalt-saturated organic felt underlayment.
- 30 lb Weight: 30# grade is heavier and thicker than 15# felt for added durability under shingles.
- 2 Squares per Roll: Each 36 in. roll covers approximately 2 squares (200 sq ft) of roof deck.
- Asphalt Saturated: Felt sheet saturated in waterproofing agent to shed moisture beneath the roofing.
- Standard Roll Size: 36 in. width fits standard residential shingle coursing.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Generic |
| Sell unit | 1 roll, 36 in., 2 squares |
| Product line | 30# Asphalt Saturated Felt, ASTM D226 |
| Material | Asphalt-saturated felt (organic felt sheet with waterproofing saturation) |
| Dimensions | 36 in. wide roll, 2 squares per roll |
| Coverage per unit | 2 squares (approximately 200 sq ft) per roll |
| Approvals | ASTM D226 |
| Available sizes | 36 in. x 2 square roll |
| Nominal size | 36 in. roll |
| Intended use | Roofing underlayment beneath shingles |
| Category | Residential Roofing/Underlayment/Felt Underlayment |
Coverage & How Much You Need:
One 36 in. roll covers about 2 squares (200 sq ft) of roof deck; divide total roof area by 200 to size the job and add laps per the ASTM D226 installation practice, typically 2 in. end laps and 4 in. side laps.
Fit and Compatibility:
Used as a shingle underlayment on steep-slope residential roofs and installed beneath asphalt shingles; pair with drip edge and starter products from the same roofing package. Fasteners or cap nails are not included.
Frequently Asked Questions (FAQ):
Q: What is included in one order?
A: One 36 in. roll of 30# ASTM D226 asphalt-saturated felt, covering about 2 squares.
Q: How many rolls do I need?
A: One roll covers about 200 sq ft, so divide your roof area by 200 and add rolls for laps and waste.
Q: What does 30# mean?
A: The number originally referred to the weight of 100 sq ft of the paper; 30# felt is thicker and heavier than 15# felt.
Q: Does it meet a standard?
A: Yes, it meets ASTM D226 for asphalt-saturated felt.
Q: How is it installed?
A: Roll it horizontally up the deck with lapped courses before shingle installation; follow standard lap practices for the roof slope.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Thirty-pound felt is the right pick when the deck will be exposed for more than a day or two before shingling, since it is more tear-resistant than 15#. Lap courses shingle-style, start at the eave, and use cap nails or tabs to hold it in wind. On steeper or shorter-duration projects, synthetic underlayments are an alternative, but this ASTM D226 felt remains the code-familiar choice for standard residential work.
Felt becomes slippery when wet or dusty, so walk on it carefully and wear fall protection when working on the roof.
Order 30# ASTM D226 asphalt felt underlayment in 36 in., 2-square rolls for your next roof.
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