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Manufacturer Varies by Location 30 lb Asphalt-Saturated Organic Roofing Felt Underlayment, 2 Squares per Roll
Regular price $31.00Orders start at $399 — combine any items to reach the minimum. Learn more
Manufacturer Varies by Location 30 lb Asphalt-Saturated Organic Roofing Felt Underlayment, 2 Squares per Roll
This 30# roofing felt underlayment roll covers 2 squares and is the standard organic felt used beneath shingles. Roofing felt is a fleece-like sheet of polyester or fiberglass fibers soaked in a waterproofing agent; the 30 lb designation reflects the original weight of 100 sq. ft. of the paper. One sell unit is one 2-square roll.
Key Features:
- Heavy 30 lb weight: The 30 lb class is the heavier traditional felt grade, referring to the original weight per 100 sq. ft.
- Two squares per roll: One roll covers approximately 200 sq. ft. of roof deck.
- Waterproofed sheet: Felt made from polyester or fiberglass fibers saturated with a waterproofing agent.
- Proven underlayment: A traditional asphalt-saturated felt used under shingle roof systems.
- Roll format: Supplied as one full roll per sell unit for fast deck coverage.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Manufacturer Varies by Location |
| Sell unit | 1 roll, 30# covering 2 squares |
| Product line | Felt Underlayment |
| Available sizes | 30# roll covering 2 squares |
| Material | Asphalt-saturated felt (polyester or fiberglass fiber base) |
| Coverage per unit | 2 squares (200 sq. ft.) per roll |
| Intended use | Underlayment beneath residential shingle roofing |
Coverage & How Much You Need:
One roll covers 2 squares, approximately 200 sq. ft. of roof deck. Order one roll per 2 squares of deck plus extra for laps at eaves, ridges and penetrations.
Fit and Compatibility:
Used beneath asphalt shingles and other slope roof coverings; pairs with drip edge, starter strip and shingle systems. Fasten with standard roofing cap nails or felt tacks per code.
Frequently Asked Questions (FAQ):
Q: What does 30 lb mean?
A: It refers to the original weight of 100 sq. ft. of felt paper; today it designates the heavier of the two traditional felt grades compared to 15 lb.
Q: How much roof does one roll cover?
A: One roll covers 2 squares, about 200 sq. ft., before laps and waste.
Q: How is it installed?
A: Roll it horizontally up the deck with proper laps and fasten with cap nails or felt tacks before shingling.
Q: What is felt made of?
A: A fleece-like sheet of polyester or fiberglass fibers soaked in a waterproofing agent.
Q: How is it different from 15 lb felt?
A: The numbers originally indicated the weight of 100 sq. ft. of paper, with 30 lb being the thicker, heavier grade.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Choose 30 lb felt over 15 lb when you want a heavier, more tear-resistant layer under shingles, especially on longer-lived roof systems. Lap horizontal courses per code and keep the felt dry before shingling, as saturated felt can wrinkle when wet. On steep or windy sites, use cap nails at tighter spacing.
Roofing work at height carries fall risk; install felt on dry decks in good weather and follow ladder safety and fall-protection practices.
Add this 30 lb roofing felt, 2 squares per roll, to your shingle job for dependable underlayment coverage.
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