Urethane Foam

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Urethane Foam

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Types and Durability

Description

Urethane Foam

Expected Lifespan

(Years)

Adjustment Factors

Closed cell rigid urethane foam boards; as preformed insulation for roofing system to ASTM E 936: 1998 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 : +5 years

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

Closed cell rigid urethane foam boards not to ASTM E 936 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 used to avoid this problem. [13]