Owens Corning home page  Weatherlock Series Self-Adhesive Waterproofing Underlayment


Lock out damage from ice damming and wind driven rain


WeatherLock Series is the Owens Corning self-adhesive waterproofing underlayment that is perfect for both new construction and reroofing applications on sloped residential buildings with wood decks.

It is available in two surfaces: Polyethylene (our premium-grade) and granule surface (GS - our affordable-grade).

The unique composition of a polyethylene or granulated surface, Styrene Butadiene Styrene (SBS) modified asphalt and a fiber glass mat helps lock out damage from ice damming and wind-driven rain. And it's backed by a five-year limited warranty.*

WeatherLock, installed between the roof deck and asphalt shingles, cedar shakes, concrete tile or metal roofing, lays flat and remains dimensionally stable. Rain. Shine. Or Ice.

WeatherLock™ installs as well as it performs

  • WeatherLock underlayment is self-adhesive and textured on top for easier handling.

  • WeatherLock is 50% thicker than many competitors' products and reinforced with Fiberglas® mat for added strength and durability, plus it lays flatter and is easier to install.

  • WeatherLock has a split backing for easy application.

  • WeatherLock seals itself around nail holes for dependable, watertight protection.

  • WeatherLock is backed by Owens Corning for a full 5 years.*


WeatherLock™ and WeatherLock™ GS Applicable Standards

WeatherLock Series self-adhesive waterproofing underlayment complies with:

  • UL Class A and C Fire Ratings

  • ASTM D 1970-90 Standard Ice Dam Underlayment

  • Uniform Building Code No.'s 32B-1, 32B-2, 32D-1 and 31D-2

  • ICBO Report No. 4991

* Please see actual warranty for details.

WeatherLock™ and WeatherLock™ GS Physical Properties
Property Test
Method
Typical
Values
Tensile Strength ASTM D-412 48 lbs./in. MD
35 lbs./in. CD
960 PSI MD
700 PSI CD
Elongation
(rubberized asphalt)
ASTM D-412 250%
Pliability ASTM D-1970 Passed
Adhesion to
Plywood
ASTM D-903 3 lbs./in.
Permeance ASTM E-96 .05 max

Typical Values
Property 1 sq. roll 2 sq. roll
Thickness 50 mils (1.4mm) 50 mils (1.4mm)
Length 33.3 ft (10.2m) 66.7 ft (21.3m)
Width 3 ft (.91m) 3 ft (.91m)
Area 100 sq ft (9.3m2) 200 sq ft (19.4m2)
All values are approximate


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