All of our information is sourced from manufacturer data.
GCP Applied Technologies (Grace)
Perm-A-Barrier NPS Wall Membrane
Vapor Retarder (Class I)
Ceiling, Sloped Roof, Wall
Standard Sizes: 0"
Product Weight Per Area
Roll Tensile Strength
Weight needed to break the roll, per inch of width
Water Vapor Transmission
An imperial perm is defined as 1 grain of water vapor per hour, per square foot, per inch of mercury
Minimum Application Temperature
Minimum temperature that the product can be applied or installed
Film Tensile Strength
Pressure required to break the film
Rate of airflow through the barrier per square foot at a specified pressure difference
cfm /ft^2 @ 1.57 psf
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