The Effect of Moisture on Asphalt Shingles

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DOIResolve DOI: http://doi.org/10.4224/20386620
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TypeTechnical Report
Series titleReport (National Research Council Canada. Division of Building Research); no. DBR-R-84
Physical description11 p.
SubjectRoofs
AbstractSamples of asphalt shingles made by seven manufacturers and available in the Ottawa area were subjected to cyclic conditions of drying in the oven at 160 degrees F. and wetting by immersion in water under partial vacuum. It was found that samples 2 by 6 inches absorbed 1.5 to 5.9 gm. of water in 4 days of vacuum saturation accompanied by a dimensional increase of from 0.4 to 1.1 per cent. On repeated cycles of drying and wetting the samples exhibited an irreversible shrinkage ranging from .02 to .07 inch.
Publication date
PublisherNational Research Council Canada
LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedNo
NRC numberNRC-IRC-9200
NPARC number20386620
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Record identifier1e0577b9-b1a8-449f-a08f-b3ddf52749b4
Record created2012-07-25
Record modified2017-06-29
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