International Building Code 1508.1
General. The use of above-deck thermal insulation
shall be permitted provided such insulation is covered with an
approved roof covering and passes the tests of FM 4450 or UL
1256 when tested as an assembly.
Exceptions:
1. Foam plastic roof insulation shall conform to the
material and installation requirements of Chapter 26.
2. Where a concrete roof deck is used and the
above-deck thermal insulation is covered with an
approved roof covering.
Cellulosic fiberboard. Cellulosic fiberboard roof
insulation shall conform to the material and installation
requirements of Chapter 23.
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ROOF ASSEMBLIES AND ROOFTOP STRUCTURES
International Building Code 1508.1.1
Cellulosic fiberboard. Cellulosic fiberboard roof
insulation shall conform to the material and installation
requirements of Chapter 23.
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ROOF ASSEMBLIES AND ROOFTOP STRUCTURES
International Building Code 1508.2
Material standards. Above-deck thermal insulation
board shall comply with the standards in Table 1508.2.