SKU: 48796340903

Grip-Rite 36-in x 32.8-ft (300-sq ft) Fiberglass Base Sheet Roof Underlayment

Sale price$48.10 Regular price$53.44
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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23

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Description

Grip-Rite 36-in x 32.8-ft (300-sq ft) Fiberglass Base Sheet Roof UnderlaymentGrip Rite Fiberglass Roof Underlayment, 36 in x 32. 8 ft A rugged fiberglass base sheet designed for flat roofing applications, this Grip Rite roll covers 300 sq ft and lays flat for fast installation. Ply lines and strong nail holding performance provide a reliable substrate for multi ply roofing systems. Key Features: Fiberglass Construction: Durable base sheet engineered for strength and nail holding ability Easy Install: Rolls out flat with

Grip-Rite Fiberglass Roof Underlayment, 36-in x 32.8-ft

A rugged fiberglass base sheet designed for flat roofing applications, this Grip-Rite roll covers 300 sq ft and lays flat for fast installation. Ply lines and strong nail-holding performance provide a reliable substrate for multi-ply roofing systems.


Key Features:

  • Fiberglass Construction: Durable base sheet engineered for strength and nail-holding ability
  • Easy Install: Rolls out flat with printed ply lines to speed alignment and fastening
  • Flat-Roof Ready: Designed for use with flat roofing; not for asphalt shingles, metal, or wood shakes
  • Generous Coverage: 36 in x 32.8 ft roll covers approximately 300 sq ft
  • Standards & Warranty: Meets ASTM 4601 Type 1; backed by a 1-year limited warranty

Specifications Table:

Specification Details
Coverage Area 300 sq ft
Length 32.8 ft
Width 36 in
Material Fiberglass
Application Method Nail
For Use with Flat Roofing Yes
For Use with Asphalt Shingles No
For Use with Metal Roofing No
For Use with Wood Shakes No
Warranty 1-year limited
Standards ASTM 4601 Type 1
UNSPSC 30151500

Frequently Asked Questions (FAQ):

Q: Can this underlayment be used under asphalt shingles?
A: No. It is intended for flat roofing applications and not for asphalt shingles.


Q: How much area does one roll cover?
A: Approximately 300 square feet per roll.


Q: What is the installation method?
A: Nailed installation; align using the printed ply lines and fasten per local codes.


Q: Is it suitable for metal or wood shake roofs?
A: No, it is not recommended for metal roofing or wood shakes.


Q: Does it meet any standards?
A: Yes, it meets ASTM 4601 Type 1 specifications.


A Sleek, Structured Foundation for Modern Flat Roofs

This fiberglass base sheet sets a clean, confident groundwork that refines the silhouette of a flat roof. I love the crisp ply lines—they guide an impeccably tailored installation, elevating the finish. Pair it with minimalist flashing and tonal gravel for a polished, architectural statement. It’s a quiet essential that underpins the luxury of a well-executed envelope.


Elevate your flat roof system with Grip-Rite’s fiberglass base sheet—order today for fast, reliable installation and lasting performance.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 48796340903

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4.6 ★★★★★
Based on 19 reviews
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Chadnic
Belleville, US
★★★★★ 5
Always order big!
I needed a minimum of 2 AWG wire to create interconnects between batteries in a large bank. If you note, these say 1/0 Gauge, not AWG. What is 1/0 Gauge? Who knows, it's fake. Meaningless, because it is not standardized so you have no clue what you are getting. What did I get for my 1/0 Gauge wire? Something that was in between 1 and 2 AWG (closer to 1). This was perfect for my needs because I knew darn well how big to order when they say gauge instead of AWG. As a rule of thumb: If they as gauge, order 3 - 4 sizes larger than you need in AWG. This will always net you larger wire than you need but I have never had it net me wire smaller than I needed. At the price I got it for during prime days, it was a steal for 2 AWG wire, so I win! I hope you found this helpful!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 21, 2024
A
Verified Purchase
Astrid Falcon
Port Orchard, US
★★★★★ 5
Heavy duty and has lasted three years so far
I have had this relay installed in the engine bay of my Lexus RX 300, functioning to link the front battery to the additional battery in the trunk whenever the ignition is on. The relay has worked reliably for about three years now with no complaints besides one minor comment, be careful when threading down the nut on the Low voltage side. It is prone to stripping
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 24, 2025
D
Verified Purchase
Dr.Ortiz Ayala
Lexington, US
★★★★★ 5
It delivers as advertised.
Works as advertised, and is easy to install.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 18, 2025
J
Verified Purchase
JOHN A.
Lake Worth, US
★★★★★ 5
Heavy Duty!!
Performed extremely well. No buzzzing or poor connection. Extremely well built and has been working issue free for over 6 months! Instalation can be a bit difficult due to size and weight. Not really a problem.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 25, 2024
S
Verified Purchase
shawn
Louisville, US
★★★★★ 4
Seems to be ok for the money
We use it to power a 2000w inverter for the refrigerator and microwave on our boat where sometimes it will stay on continuously throughout the day and it hasn't let us down. As others have said, the terminals are awful close together but for the money, it's worth it.
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Reviewed in the United States on January 21, 2025

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