All of our information is sourced from manufacturer data.
MFM Bldg. Products Corp.
IB3 Storm Stopper
WRB (Weather/Water Resistant Barrier)
Sloped Roof, Wall
Concrete, Masonry, Wood Sheathing
Standard Sizes: 3' 0"
Standard Sizes: 5' 7"
Standard Sizes: 0"
Manufacturer Design Notes
Comes with a non-removeable selvedge edge for a secure seal on overlaps. Applies easily at eaves, valleys, vents, skylights and chimneys.
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
Minimum Application Temperature
Minimum temperature that the product can be applied or installed
California Building & Residential Code CBC CRC
City of Los Angeles Approval
Florida Building Code
ICC Evaluation Service
Miami Dade County
Texas Department of Insurance
More to Explore
All Window Categories
Discover more than 100 curated collections of windows to inspire your next project.
Understand how the frame material, type, and glazing affect a window’s cost & see price ranges.
Download manufacturer specs from more than 7,000 residential & commercial windows.