The Effect of Moisture on Asphalt Shingles

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TypeTechnical Report
Series titleReport, National Research Council Canada, Division of Building Research; Volume 84
Physical description11 p.
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
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number9200
NPARC number20386620
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Record identifier1e0577b9-b1a8-449f-a08f-b3ddf52749b4
Record created2012-07-25
Record modified2016-10-03
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