All of our information is sourced from manufacturer data.
Perma R Products
Ceiling, Sloped Roof, Wall
Standard Sizes: 3' 0", 4' 6", 9' 6", 10' 0"
Standard Sizes: 8' 4", 12' 6", 16' 3"
Standard Sizes: 0"
Rate of airflow through the barrier per square foot at a specified pressure difference
Product Weight Per Area
Water Vapor Transmission
An imperial perm is defined as 1 grain of water vapor per hour, per square foot, per inch of mercury
Weight needed to break the roll, per inch of width
lbs / in
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