Polyisocyanurate Foam

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Polyisocyanurate Foam

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Types and Durability

Description

Polyisocyanurate Foam

Expected Lifespan

(Years)

Adjustment Factors

Closed cell rigid polyisocyanurate foam boards faced to C 1289: 2002, Unfaced to ASTM 591: 2001 or to BS 4841: Part 3, faced on both sides with bitumen coated glass tissue or glass/ polyethylene/ glass facing.

35+

Test certificate from approved local testing authority : +15% years.

For inverted roof system or in protected membrane system: -15% years.

Closed cell rigid polyisocyanurate not to ASTM C 1289: 2002 or ASTM 591: 2001 or BS 4841: part 3

< 10

None

Note: Some insulants are not compatible with bituminous materials due to migration of plasticizer separating membranes are necessary to be sued to avoid this problem. [12]