Section 1508 Roof Insulation
The use of above-deck thermal insulation shall be permitted provided that such insulation is covered with an approved roof covering and passes the tests of NFPA 276 or UL 1256 when tested as an assembly.
Above-deck thermal insulation board shall comply with the standards in Table 1508.2.
[BF] TABLE 1508.2
MATERIAL STANDARDS FOR ROOF INSULATION
|Cellular glass board||ASTM C552|
|Composite boards||ASTM C1289, Type III, IV, V or VII|
|Expanded polystyrene||ASTM C578|
|Extruded polystyrene||ASTM C578|
|Fiber-reinforced gypsum board||ASTM C1278|
|Glass-faced gypsum board||ASTM C1177|
|High-density polyisocyanurate board||ASTM C1289, Type II, Class 4|
|Mineral fiber insulation board||ASTM C726|
|Perlite board||ASTM C728|
|Polyisocyanurate board||ASTM C1289, Type I or II|
|Wood fiberboard||ASTM C208, Type II|