- Author
-
Booth, R. J.
|
DeRushie, C.
|
Liu, K. K. Y.
- Title
- Protection of Foam Plastic Thermal Insulation in Low Sloped Roofing Systems.
- Coporate
- National Research Council of Canada, Ottawa, Ontario
- Journal
-
Journal of Thermal Envelope and Building Science,
Vol. 30,
No. 3,
1-20,
2002
- Report
-
NRCC 45712,
- Distribution
- FOR MORE INFORMATION CONTACT: National Research Council of Canada, Institute for Research in Construction, Ottawa, Ontario, K1A 0R6, Telephone (613) 993-2607, Fax: (613) 952-7673, Email: Irc.Client-Services@nrc.ca Full Document in PDF - Website: http://irc.nrc-cnrc.gc.ca/fulltext/nrcc45712/
- Keywords
-
roofs
|
thermal insulation
|
plastics
|
foam (materials)
|
barriers
|
moisture
|
polyisocyanurate foam
|
polystyrene foams
|
damage
|
corrosion
- Identifiers
- air-vapor barriers; condensation; foam plastic thermal insulation; low sloped roofing; phenolic foam insulation; roof membrane blistering; roof traffic damage; galvanized steel roof deck corrosion; galvanized steel fastener corrosion
- Abstract
- Foam plastic thermal insulations have substantially replaced traditional insulations in low sloped roofing systems in North America. Foam plastic thermal insulations used in low sloped roofs are low density (typically 16 to 48 kg/m 3 ) materials with low permeability to air and water vapour. In many roofs these materials have been directly substituted for traditional (wood and glass fibre) insulations without due attention to the different material characteristics. Moist air movement within roofs, condensation protection (air and vapour barriers), steel deck corrosion, roof membrane blistering and roof traffic damage are discussed. This paper discusses protection of foam plastic thermal insulations in roofing systems, why the protection is needed, and what consequences result if these materials are not protected. Case studies demonstrate the importance of condensation protection in reducing corrosion of galvanized steel in roofs containing closed cell phenolic foam roof insulation in Canada.