Codes & Ratings
What is Ice Barrier Zone?
Roofing Glossary · Codes & Ratings
Definition
A code-defined geographic area where the installation of ice-and-water shield at roof eaves is mandatory due to risk of ice dam formation. Under the IRC, ice barriers are required where the average January temperature is 25 degrees F or lower — covering most of New England, New York, the upper Midwest, and mountain states. The code minimum requires ice barrier extending from the eave to a point 24 inches inside the exterior wall.
Related Roofing Terms
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Ice and Water ShieldA self-adhering, waterproof membrane installed on the roof deck in vulnerable areas — typically the ...
→Ice DamA ridge of ice that forms at the eave of a roof when heat from the interior melts snow on the warmer...
→Building CodeThe minimum legal standards governing construction methods, materials, and installations in a given ...
→IRC (International Residential Code)The model building code developed by the International Code Council (ICC) that sets minimum standard...
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