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

Regular price $60.06

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Shipping calculated at checkout.

WeatherLock Mat Polypropylene Roof Underlayment, 200-sq ft

Lightweight, self-sealing roof underlayment designed to add a waterproof layer beneath shingles. The WeatherLock Mat roll covers 200 sq ft and features SureStep technology for improved traction and easier installation.


Key Features:

  • Waterproof Protection: Acts as a secondary barrier under shingles to help prevent leaks from wind-driven rain and ice dams
  • SureStep Traction: Mat-faced design provides consistent surface grip to reduce slipping, sticking, and scuffing
  • Lightweight Handling: Up to 40% lighter than standard mat-faced products for easier loading, carrying, and installation
  • Versatile Application: Suitable for full deck coverage and vulnerable areas like eaves, rakes, valleys, vents, chimneys, and skylights
  • Self-Adhesive Convenience: Adheres to deck to create a watertight seal around nails and speeds installation

Specifications Table:

Specification Details
Series Name WeatherLock Mat
Coverage Area 200 sq ft
Length 66.7 ft
Width 36 in
Application Method Roll on
Material Polypropylene
For Use with Asphalt Shingles Yes
For Use with Flat Roofing Yes
For Use with Metal Roofing No
For Use with Wood Shakes No (web spec), marketing images show engineered for wood shake
CA Residents: Prop 65 Warning(s) Yes
Warranty None
UNSPSC 30151500
Feature Self-adhesive, self-sealing waterproofing barrier
Weight (lbs.) 61.5

Frequently Asked Questions (FAQ):

Q: What roof types is this underlayment compatible with?
A: It’s engineered for asphalt shingles, wood shakes, and quarry slate roof assemblies; not recommended for metal roofing.


Q: How much area does one roll cover?
A: Each roll measures 36 inches by 66.7 feet and covers 200 square feet.


Q: Is the surface safe to walk on during installation?
A: Yes. The SureStep mat-faced design provides excellent traction to help reduce slipping and scuffing.


Q: Does it require special tools to install?
A: No special tools are required; it is a roll-on, self-adhesive underlayment designed for straightforward application.


Q: Is there a manufacturer warranty?
A: No warranty is listed for this product.


Sleek, Secure Roofing Foundation

WeatherLock Mat brings a refined, matte texture that quietly elevates the craft beneath your shingles. Its standout SureStep surface offers confident footing as you sculpt clean roof lines. Use it to trace elegant edges around eaves and valleys for a tailored finish. This is the discreet luxury that ensures beauty endures—protection with poise.


Secure your roof with WeatherLock Mat—lightweight, grippy, and built to keep water out—order your 200-sq ft roll today.

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