SYMPOSIA PAPER Published: 22 February 2020

Laboratory Conditioning Methods for Asphalt Shingles


The Insurance Institute for Business & Home Safety (IBHS) began testing the wind uplift performance of asphalt shingles in 2011. Self-sealing asphalt shingles have a temperature-activated sealant strip that adheres the bottom surface of a shingle to the top surface of the shingle beneath. Recent IBHS wind testing of asphalt shingle products demonstrated that the strength of the seal between the shingles is the most important factor affecting high-wind performance for self-sealing asphalt shingles. Current industry wind test methods require a conditioning method that uses convective heat, which is different than the radiant heat exposure in the natural environment. The objective of this study was to evaluate the effectiveness of sealant strips when exposed to convective versus radiant heat sources. Four different conditioning protocols were used to activate the sealant strip of 3-tab asphalt shingles. The strength of the sealant for the condition protocols was evaluated using the methodology provided in ASTM D3161, Standard Test Method for Wind Resistance of Steep Slope Roofing Products (Fan-Induced Method), ASTM D6381, Standard Test Method for Measurement of Asphalt Shingle Mechanical Uplift Resistance, and a customized loading protocol that replicates the loading method of ASTM D6381 but is applied over the entire length of a 3-tab shingle (approximately 12 in.). Test results indicated that radiant heat conditioning led to consistent uplift resistance of asphalt shingles that was similar to elevated convective heat conditioning methods.

Author Information

Estes, Heather
Insurance Institute for Business & Home Safety, Richburg, SC, US
Morrison, Murray
Insurance Institute for Business & Home Safety, Richburg, SC, US
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Developed by Committee: D08
Pages: 133–147
DOI: 10.1520/STP162120190003
ISBN-EB: 978-0-8031-7689-8
ISBN-13: 978-0-8031-7688-1