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Building Code Compliance & Spray Foam Insulation

Building Code Compliance & Spray Foam Insulation

It is required that all spray foam insulation, open and closed, be protected with a fire protection coating in attics and crawl spaces according to IBC2006, 2603.4.1.6 (see below)

2603.4.1.6 Attics and crawl spaces. Within an attic or Crawl space where entry is made only for service of utilities, Foam plastic insulation shall be protected against Ignition by 1.5-inch-thick (38 mm) mineral fiber insulation; 0.25-inch-thick (6.4 mm) wood structural panel, Particleboard or hardboard; 0.375-inch (9.5 mm) gypsum Wallboard, corrosion-resistant steel having a base Metal thickness of 0.016 inch (0.4 mm) or other Approved material installed in such a manner that the Foam plastic insulation is not exposed. The protective Covering shall be consistent with the requirements for the type of construction.


The above applies to all spray foam insulations, both open and closed cell unless the manufacturer holds an ES report issued by the International Code Council exempting them from this requirement. There are only a few closed cell products that currently meet these standards. Be sure to ask any spray foam contractor if their foam meets code or if they will need to spray an ignition barrier over their foam in order for it to meet code as is often the case. Be sure to protect yourself in any project by ensuring code compliance.


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