225 sq. ft. WeatherLock Flex Flexible Self-Sealing Ice and Water Shield Leak Barrier
- Flexible ice and water shield for vulnerable sections of roof
- Slip-resistant surface for great traction and safe installation
- Strong self-adhesive barrier and seals tightly around nails
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Frequently Bought Together
Product Overview
America's Most Trusted And Recognized Brand In Roofing
77% of homeowners feel it is important to trust the shingle brand of their roof and Owens Corning is 3X more trusted than other shingle brands.*
Total Protection Is More Than Shingle Deep
It takes more than shingles to protect your home. It takes an integrated system of components and layers designed to help perform in three critical areas.
More Than Just A Roof
Owens Corning is a market leader in shingles, components, underlayment and specialty products.
Helps Create a Water-Proof Barrier
Powerful two-part protection helps keep moisture away from the roof deck.
Helps Protect Against Nature's Elements
Three kinds of shingles work together for specialized protection on each part of the roof.
Optimize Airflow In Your Attic
Proper ventilation helps create a balanced flow where warm, humid air is conditionally replaced by cool, dry air.
+ COMFORT. Attic Insulation
Optimize value, comfort and performance by adding attic insulation.
Women's Choice Award 2019
This award is given by women for women and is based on a national survey that measures brand preference by female consumers.
Inspiration
Your roof is more than just protection for your home. It's an expression of your personality and style and can be up to 40% of the exterior of your home!
Make More Possible
Owens Corning is a global leader in engineered materials for roofing, insulation and composites.
Expanding Our Impact
We have a commitment to care for people and the planet while delivering a material difference to all stakeholders.
World Class Sustainability
For us, sustainability is about meeting the needs of the present while leaving the world a better place for the future.
OC Gives Back
We make a difference by empowering people and the communities in which we live and work.
- High performance-flexible and pliable poly surface
- Aggressive self-adhesive helps prevents water migration
- Slip-resistant surface for excellent traction and safe installation
- Seals tight around nails
- UV exposure up to 30 days
- Weatherlock G does not replace the starter shingle strip. Owens Corning Starter Shingle Roll can be installed over Weatherlock Leak Barrier products.
- WeatherLock Specialty Tile and Metal Self-Sealing Waterproofing Underlayment should be used with a metal roof.
- Shop Owens Corning Total Protection Roofing System:
- Step 1: Seal – Ice & Water Barrier and Underlayment properly seals your roof and helps prevent rot and mold
- Step 2: Defend – Owens Corning shingles add a tough, yet beautiful layer of defense with strong adhesion that resists blow offs and helps shed water away
- Step 3: Breathe – proper ventilation reduces heat and moisture buildup to prevent ice damming, roof deterioration, and mold infestation
- Step 4: Comfort – Add comfort and energy performance with proper attic insulation
- In order to meet the requirements for the Total Protection Roofing System Limited Warranty, Owens Corning shingles, Owens Corning Hip & Ridges shingles and two additional Owens Corning roofing accessories must be installed.
- California residents
Info & Guides
Compare Similar Underlayments & Leak Barriers
|  |  |  | |
| Brand | Owens Corning | GAF | GAF | GAF |
| Name | 225 sq. ft. WeatherLock Flex Flexible Self-Sealing Ice and Water Shield Leak Barrier | Deck-Armor 400 sq. ft. Premium Breathable Synthetic Roofing Underlayment Roll | Tiger Paw 1000 sq. ft. Premium Synthetic Roofing Underlayment Roll | Deck-Armor 1000 sq. ft Premium Breathable Synthetic Roofing Underlayment Roll |
| Price | ||||
| Ratings | (19) | (5) | (21) | (3) |
| Underlayment/Barrier Type | Leak Barrier | Synthetic Underlayment | Synthetic Underlayment | Synthetic Underlayment |
| Application Method | Peel & Stick,Self Adhered | Nail | Nail | Nail |
| Features | Waterproof | Mildew Resistant,Waterproof | Waterproof | Algae Resistant,Waterproof |
| Unrolled length (ft.) | 75 | 100 | 250 | 222 |
| Product Width (in.) | 36 in | 48 | 48 | 54 |
| Material | Asphalt | Felt | Felt | Felt |
| Roofing Product Type | Underlayment | Underlayment | Underlayment | Underlayment |
| Fire Rating (UL 790) | Class A | No Rating Available | Class A | No Rating Available |
| Product Thickness (in.) | .048 in | 6.5 in | 0.0313 in | 9 in |
| View Product | View Product | View Product | View Product |
Compare Similar Underlayments & Leak Barriers
| | | | |
| Brand | Owens Corning | GAF | GAF | GAF |
| Name | 225 sq. ft. WeatherLock Flex Flexible Self-Sealing Ice and Water Shield Leak Barrier | Deck-Armor 400 sq. ft. Premium Breathable Synthetic Roofing Underlayment Roll | Tiger Paw 1000 sq. ft. Premium Synthetic Roofing Underlayment Roll | Deck-Armor 1000 sq. ft Premium Breathable Synthetic Roofing Underlayment Roll |
| Price | ||||
| Ratings | (19) | (5) | (21) | (3) |
| Underlayment/Barrier Type | ||||
| Application Method | ||||
| Features | ||||
| Unrolled length (ft.) | ||||
| Product Width (in.) | ||||
| Material | ||||
| Roofing Product Type | ||||
| Fire Rating (UL 790) | ||||
| Product Thickness (in.) | ||||
| View Product | View Product | View Product | View Product |
Specifications
Dimensions
Details
Warranty / Certifications
Questions & Answers
How long can the product be exposed to the weather before shingles are applied? I will be doing a 700 sf roof solo so it will take some time
Asked by Joe February 27, 2021Hello Joe, Owens Corning WeatherLock Flex should not be left exposed for more than 30 day. Prolonged exposure to wind, sun and weather will adversely affect this products installation and performance. Thank you for your inquiry!
Will this product adhere to FOAMULAR 150 Extruded Polystyrene (XPS) Rigid Foam Insulation???
Asked by Kent July 24, 2020Hello Kent, we do not have recommendations for installing WeatherLock Flex directly to Foamular. Thank you for your inquiry!
flat porch roof?
Asked by splion July 19, 2020Hello splion, WeatherLock requires a minimum slope of 2:12. Thank you for your inquiry!
What is the width and length of this product?
Asked by Susan March 25, 2020Hello Susan - Width is 36 inches, unrolled length is 75 ft. Thank you for your inquiry!
Will product color leach onto roof's facial boards due to heat or moisture?
Asked by John March 23, 2020Hello John - The color in this product will not leach onto fascia boards. Thank you for your inquiry!
Would this product work if used vertically? I have shed with tar paper under the siding . The sid...
Asked by al March 10, 2020Hello al - WeatherLock Flex is not designed for this type of application. Thank you for your inquiry!
Can I use this on exterior cement block walls on my garage?
Asked by johnlittleman1 March 6, 2020Hello johnlittleman1 - WeatherLock Flex is not designed for this type of application. Thank you for your inquiry!
our roofer used this product on a roof in AK, installation was nearly complete when we had unexpe...
Asked by raven February 11, 2020Hello raven - More information is needed in order to assist you. Please contact an Owens Corning representative at 1-800-GET-PINK for assistance. Thank you for your inquiry!
how many liner feet does this cover?
Asked by joe January 24, 2020Hello Joe - coverage area is 225 sq. ft. Thank you for your inquiry!
so you have a film on the back that needs to be removed so it will stick to the wood roof. Is tha...
Asked by jim July 18, 2019Hi jim, Weatherlock G does have a plastic release backer. This backer is split. installation instructions can be found on Home Depot's link for this product. Thanks for your inquiry!
Customer Reviews
We are sorry to hear about your experience with our product. We would welcome you to contact us at 800-Get-Pink to discuss further.
Thank you!
Owens Corning
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