Performance of Insulations Located Above an Impermeable Membrane in a Flat Roof System

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TypeTechnical Report
Series titleInternal Report, Division of Building Research, National Research Council Canada; Volume 386
Physical description10 p.
AbstractThe impermeable membrane of a flat roof can be protected from solar radiation, the effects of extreme temperature variation, and from traffic damage by placing it beneath the roof insulation. This provides the membrane with a better chance of performing its function of protecting the building from the entry of moisture. Now, however, the insulation is exposed to the weather and may lose its thermal insulating properties by becoming wet. Using experimental facilities which permit exposure of materials to outdoor conditions, several insulations - both porous and closed cell - were incorporated into a roof system of this type. Moisture contents and thermal conductances were measured periodically over a span of about two years. The results are reported here. This is being followed by work involving similar measurements with other design arrangements.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number8007
NPARC number20331657
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Record identifier18a28739-2815-4047-88a9-d614bb308ac7
Record created2012-07-18
Record modified2016-10-03
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