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WeatherLock® G Granulated Water-resistant Underlayment provides superior roof deck protection for your home. It helps prevent damage caused by freeze/thaw cycling, wind-driven rains, and normal water flow that occurs around valleys, vents, chimneys and skylights. It's an essential part of a complete roofing system.
Ice And Water Shield Weatherlock
 
Area: 1 sq. roll - 100 sq. ft.
Area: 2 sq. roll - 200 sq. ft.
Thickness: 55 mils
Length: 1 sq. roll - 33.3 ft.
Length: 2 sq. roll - 66.7 ft.
Width: 3 ft.
 
ICBO ES ER 4991
UBC 15B-1
UBC 15B-2
UBC 15D-1
UBC 15D-2
UL 790, Class A
UL 790, Class C
 

Physical Properties

Property Test Method Typical Values*
Thickness -------- 55 mils
Slip Resistance Asphalt Saturated Felt Passed
Pliability 1" Mandrel Bend at -20°F Passed
Tensile Strength
  Longitudinal (md)
  Transverse (cd)
ASTM D 412
48 lbs/in
35 lbs/in
Elongation at Break
(modified bitumen portion)
ASTM D 2523 250%
Permeance ASTM E 96 .05 max
Adhesion to Plywood, 40°F ASTM D 903 1.0 lbs/in
Adhesion to Plywood, 75°F ASTM D 903 6.0 lbs/in
Tear Resistance
  Longitudinal
  Transverse
ASTM D 4073
20 lbs
20 lbs
Sealability around Nail ASTM D 1970 Passed
Low Temperature Flexibility ASTM D 1970 Passed
Waterproofing Integrity after
Low Temperature Flex
ASTM D 1970 Passed
Waterproofing Integrity of Lap ASTM D 1970 Passed

*All values are approximate

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