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Understanding underlayment

Abstract
The International Building Code,® 2021 Edition and International Residential Code,® 2021 Edition require enhanced underlayment materials and application methods for asphalt shingle roof systems in certain situations, such as when installing them in low-slope applications or high-wind regions. Asphalt shingle roof system designers and installers should be aware of these enhancement requirements; highlights follow.
Date
5/2023
Author(s)
Mark Graham
Page(s)
24-28
Source
Professional Roofing / National Roofing Contractors Assn
Keyword(s)
high; wind; regions; IBC; asphalt; shingle

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