Your Hail Damage Repair Specialists ---- Highly Recommended By Major Insurance Companies Serving All Wisconsin and Oklahoma Communities

Leak Barriers

    "Protect Your Investment And Safeguard Vulnerable Areas"
  • Protect Your Property...
    Help prevent wind-driven rain from leaking through the roof deck, or melting ice and snow (caused by ice dams in harsh winter climates) from leaking into property’s interior 
  • Add Extra Protection...
    In valleys and at eave and rake edges — the most leak-prone areas of the roof. Strongly recommended for chronic problem areas like skylights, dormers, vent pipes, chimneys, and other flashing areas 
  • Won’t Leak...
    Helps ensure a 100% watertight seal 
  • Avoid Costly Repairs...
    Due to staining on interior walls and ceilings
  • Better Appearance...
    Fiberglass reinforcement helps resist wrinkling and buckling — lays flatter under shingles 
  • Saves Labor...
    Split-back release film peels off in sections, for faster installation and superior property owner value 
  • Peace Of Mind...
    Benefits from the same warranty term as the shingles they are applied under, up to a maximum of 30 years*

*See ltd. warranty for complete coverage and restrictions

StormGuard StormFlash

Film surfaced leak barrier, suitable for application under shingle and metal roofs

Specialty self-adhering flashing, air, and moisture barrier.  
WeatherWatch UnderRoof 2

Mineral surfaced leak barrier, suitable for application under shingle roofs.
UnderRoof™ 2 

Premium leak barrier designed for use under tile roofs .
WeatherWatch WeatherWatch
WeatherWatch® XT

Mat surfaced leak barrier with XTra traction, suitable for application under shingle roofs.
UnderRoof HT

Now, Protect Your Metal, Shingle, Or Tile Roof With A Waterproof Leak Barrier roofs.

Weather Watch® Leak Barrier

Protect Your Home From Wind-Driven Rain And Damaging Ice Dams With A Waterproof Leak Barrier 

IMPORTANT NOTE: The product Information Sheet for Weather Watch®  Leak Barrier with a print date of 10/07 listed the incorrect information that Weather Watch Leak Barrier was made with a “high temperature compound” and was “suitable for use with most metal roof applications”. This product is not made with a high temperature compound and it is not suitable for use under any metal roof. The incorrect information was listed on the web site from October 15th -18th  2007 and distributed in hard copy form, October 1st – October 18th  2007.

A Quality Leak Barrier Will:

Create a 100% watertight seal that keeps water out at the most vulnerable areas of your roof (at the eaves and rakes, in valleys, around chimneys, etc.).

Weather Watch®, a quality leak barrier, will:
  • Protect your home by preventing costly repairs due to wall or ceiling staining
  • Help prevent leaks due to water damming in your gutters,
    wind-driven rain, and, in the North, damaging ice dams

    Good Housekeeping

Weather Watch® leak barrier is a key part of the GAF Smart Choice® Roof System Solution.

Don’t Put Your Home At Risk

  • The Codes Are Clear...

    Protection against ice dams is required* at eaves wherever the January average temperature is 25°F 
    or lower or where there is a possibility of ice forming 
    in the eaves 

  • But Be Prepared...

    Ice dams can still occur in areas where the average temperature is above 25°F (not to mention wind-
    driven rain) 

  • Avoid The Risks...

    If you are in an area that requires leak barrier protection – and if there is a leak – you could be putting your insurance coverage at risk by not installing it!


Homeowner’s Best Choice

  • Looks Better...

    Fiberglass reinforcement helps resist wrinkling and buckling – lays flatter under shingles 

  • Meets Building Codes...

    In the North, where a leak barrier MUST be used* 

  • Peace Of Mind...

    Benefits from the same warranty term as the asphalt shingle it is applied under, up to a maximum of 30 yrs**


Professional’s Best Choice

  • Helps Eliminate Waste...

    Special adhesive allows for one-time repositioning, but aggressively adheres over time 

  • Safer Installation...

    SlipGuard™ mineral surface improves footing 

  • Dependable...

    Self-seals around nails or metal roofing fasteners 

  • Saves Labor...

    Split-back release film peels off in layers for faster installation and greater homeowner value 

  • Convenient...
    1.5 and 2.0 square roll sizes

  • Great For Emergencies...

    Can be left exposed for up to 60 days if necessary


*Check local building codes for specifications in your area

** See ltd. warranty for complete coverage and restrictions

†Source: International Building Code (ICBO), IRC, UBC, NBC, and SBC


GAF Weather Watch ® Leak Barrier EXCEEDS the following requirements of ASTM D1970

Property Method Requirement
Thickness (mils) D5147 Min. 40
Tensile strength MD (lbf/in) D2523 Min. 25
Tensile strength CMD (lbf/in) D2523 Min. 25
Elongation at break, modified bitumen Portion – MD and CMD (%) D2523 Min. 10
Adhesion to plywood at 75°F (lbf/ft-width) D903 Min. 12
Adhesion to plywood at 40°F (lbf/ft-width) D903 Min. 2
Thermal stability (mm) D1204 Max. 3
Low temperature flexibility ( –20°F) D1970 Pass
Tear resistance MD (lbf) D4073 Min. 20
Tear resistance CMD (lbf) D4073 Min. 20
Moisture vapor permeance (U.S. Perms) E96 A Max 0.1
Sealability around nail D1970 Pass
Waterproof integrity after low temperature flexibility D1970 Pass
Waterproof integrity of lap seam D1970 Pass


Product Specifications (Nominal)

Specification 1.5 Square Roll 2.0 Square Roll
Roll length 50 ft (15.2 m) 66.7 ft (20.3 m)
Roll width 36 in (0.9 m) 36 in (0.9m)
Sq. feet per roll 150 sq ft (13.9 sq m) 200 sq ft (18.6 sq m)


Applicable Standards

  • ICC-ES Evaluation Report (ESR 1322)
  • Meets the performance criteria of ASTM D1970
  • Texas Department of Insurance
  • Miami-Dade County Approved
  • State of Florida Approved
  • UL Classified. See complete marking on product