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Tarah 30# Felt Underlayment, ASTM D4869, Roll
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Tarah 30# Felt Underlayment, ASTM D4869, Roll
Tarah 30# Felt is an organic asphalt-saturated felt roofing underlayment that meets ASTM D4869 and is sold as a roll. Installed beneath asphalt shingles, it adds a secondary water-shedding layer over the roof deck. Use it under shingle roofing with drip edge and flashing to complete the roof assembly.
Key Features:
- ASTM D4869: Manufactured to meet ASTM D4869, the standard specification for asphalt-saturated felt underlayment.
- 30# Weight Class: A 30-pound felt for heavier-duty secondary protection under shingles.
- Roll Format: Ships as a roll for efficient coverage across roof decks.
- Shingle Underlayment: Installed beneath asphalt shingle roofing as a secondary water-shedding layer.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Tarah |
| Sell unit | 1 roll |
| Product line | Tarah felt underlayment |
| Material | Asphalt-saturated organic felt |
| Standard | ASTM D4869 |
| Weight class | 30# |
| Intended use | Roofing underlayment beneath shingles |
Coverage & How Much You Need:
A standard roll of 30# felt underlayment covers roof deck in horizontal courses with the laps required by your local code and shingle manufacturer—typically 2 in. side laps and 4 in. or greater end laps. Calculate rolls from the deck area plus a lap and waste allowance.
Fit and Compatibility:
Used under asphalt shingle roofing systems and pairs with drip edge, starter courses and flashings. Matching 15# felt and synthetic underlayments may be substituted per project spec; shingles sold separately.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One roll of Tarah 30# felt underlayment meeting ASTM D4869.
Q: What is it used for?
A: It is a roofing underlayment installed over the roof deck beneath asphalt shingles for secondary water shedding.
Q: What standard does it meet?
A: It is specified to ASTM D4869.
Q: What does 30# mean?
A: It is the traditional weight class designation for this heavier organic felt, heavier than standard 15# felt.
Q: How is it installed?
A: It is rolled out horizontally across the deck with code-required laps and fastened before shingles are applied.
Q: Is a warranty stated?
A: No manufacturer warranty is stated in the available product information.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Choose 30# felt where the spec or local code calls for heavier underlayment or where the roof will be exposed to weather briefly during construction. Keep laps to the shingle manufacturer's requirements and dry-in valleys and penetrations with appropriate flashing. In high-wind areas, confirm fastening patterns with the project's specification.
Felt underlayment becomes slippery when wet or dusty—wear non-slip footwear and use fall protection when working on roof decks.
Order Tarah 30# ASTM D4869 felt underlayment by the roll for dependable secondary protection under shingles.
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