SKU: 22409266611

Owens Corning WeatherLock 36-in x 66.7-ft (200-sq ft) Polypropylene Roof Underlayment

Sale price$71.08 Regular price$78.98
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Ships within 48 hours · Estimated delivery Jul 27 - Aug 1

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Description

Owens Corning WeatherLock 36-in x 66.7-ft (200-sq ft) Polypropylene Roof UnderlaymentWeatherLock Polypropylene Roof Underlayment, 36 in x 66. 7 ft Self adhering WeatherLock roof underlayment creates a watertight secondary barrier beneath shingles. The granulated, slip resistant surface and excellent tear resistance help ease installation while protecting vulnerable areas against ice dams and wind driven rain. Key Features: Self Adhesive Seal: Adheres to the deck and seals around nails to help prevent water migration. Slip Resistant

WeatherLock Polypropylene Roof Underlayment, 36-in x 66.7-ft

Self-adhering WeatherLock roof underlayment creates a watertight secondary barrier beneath shingles. The granulated, slip-resistant surface and excellent tear resistance help ease installation while protecting vulnerable areas against ice dams and wind-driven rain.


Key Features:

  • Self-Adhesive Seal: Adheres to the deck and seals around nails to help prevent water migration.
  • Slip-Resistant Surface: Granulated top provides traction for safer, easier installs.
  • Tear-Resistant Build: Resists cracking and breaking during installation for durability.
  • Enhanced Waterproofing: Modified asphalt construction forms a dependable watertight barrier; selvedge edge improves seal between courses.
  • Sized for Coverage: 36-in x 66.7-ft roll covers 200 sq ft for efficient roof projects.

Specifications Table:

Specification Details
Series Name WeatherLock
Coverage Area 200 sq ft
Roll Length 66.7 ft
Roll Width 36 in
Material Polypropylene
Application Method Self-adhesive, roll on
Surface Granulated, slip-resistant
Tear Resistance Excellent; resists cracking and breaking during installation
Water Protection Ice and water barrier; seals around nails
Selvedge Edge Improves seal between courses
For Use with Asphalt Shingles Yes
For Use with Flat Roofing No
For Use with Metal Roofing No
For Use with Wood Shakes Yes
Warranty None
CA Prop 65 Warning Yes
UNSPSC 30151500

Frequently Asked Questions (FAQ):

Q: What roofing materials is this underlayment compatible with?
A: Designed for use with asphalt shingles and suitable for wood shakes and slate roof assemblies as part of a roofing system.


Q: Is it self-adhering or mechanically fastened?
A: It is a self-adhesive underlayment that bonds to the roof deck and seals around nails.


Q: How much area does one roll cover?
A: Each 36-in x 66.7-ft roll covers 200 square feet.


Q: Does it help with ice dams and wind-driven rain?
A: Yes, it acts as an ice and water barrier to protect vulnerable areas such as eaves, valleys, chimneys, vents, and skylights.


Q: Is the surface safe to walk on during install?
A: Yes, the granulated surface is designed to be slip-resistant for better traction.


A Sleek, Watertight Foundation for Your Roof

WeatherLock lays down a crisp, graphite-hued canvas that disappears beneath shingles yet elevates the entire assembly with performance. Its granulated texture is a subtle, tactile detail that grips underfoot and signals strength. Wrap eaves, valleys, and chimneys to craft a flawless, watertight edge before the first shingle is set. Consider it the quiet luxury layer—essential protection that lets your roof look beautiful and live beautifully.


Secure your roof with WeatherLock today and add a reliable, watertight barrier before the shingles go on.

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: 22409266611

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4.4 ★★★★★
Based on 26 reviews
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Verified Purchase
Shopper
Carnegie, US
★★★★★ 5
Good stuff !
Model: 36 SqFt(3.4 SqM), Model: 36 SqFt(3.4 SqM)
This is an excellent product. Easily moldable, cuttable with good scissors or razor knife, very sticky, works great. This pack was enough to do all 4 doors on a crew max truck, and I went wild on the fronts. I used 9 peices on each rear door which was just enough, and the rest on the fronts. I doubled up layers and even used some on the back of the door panels. If you follow the instructions and dont go wild you might even have extra left over. It works just like you would imagine. Without doing the entire cab there will still be road noise but this helped noise, better audio, no buzzing door panels, terrific improvement. It is kind of heavy, so extra weight is added to truck, but that really isnt a bad thing. It is noticable but in a good way. Get it. Use it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 20, 2026
O
Verified Purchase
Odin M Turner
Birmingham, US
★★★★★ 4
Good product
Model: 36 SqFt(3.4 SqM)
Easy to roll out. Works great  Why did you pick this product vs others?: Fair price for the amount of coverage, good quality  Works well: Easy to install, rolls out great. Forms to contours well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 13, 2025
B
Verified Purchase
BRIAN HEATH
Dallas, US
★★★★★ 5
Great product
Model: 36 SqFt(3.4 SqM)
I used this on the doors of a Toyota Tacoma, worked as it described. Reduced the road noise significantly.. Need to buy another box for the floor and roof of the truck..
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
T
Verified Purchase
TimtheK
Natrona Heights, US
★★★★★ 5
Great product - Add foam product for complete solution
Model: 36 SqFt(3.4 SqM)
Used in two cars with speaker upgrades. Easy to install but get the roller for assured adhesion.removes "tinnyness" from large metal resonators. Use with foam absorptive material for a complete system.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
T
Verified Purchase
TitothePinkTorpedo
Omaha, US
★★★★★ 5
Great Product for noise reduction in Auto Use.
Model: 36 SqFt(3.4 SqM)
I use this on many builds to dampen the metal echo in cars, vans, and trucks. Just one sheet in the center of a body panel is a huge difference maker. You can also cover the entire surface and get added insulation value. The noise is greatly depleted and it's easy to install with a roller tool. Looks Great when done. Good Product I will use again!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 29, 2025

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