Evaluation of air leakage properties of seam-fastened mechanically attached single-ply and polymer-modified bitumen roof membrane assemblies

DOIResolve DOI: http://doi.org/10.1520/STP159020150025
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TypeBook Chapter
Proceedings titleRoofing Research and Standards Development: 8th Symposium
Conference8th Symposium on Roofing Research and Standards Development, Dec. 6, 2015, Tampa, Florida
ISBN978-0-8031-7625-6
VolumeSTP 1590
Pages3043
Subjectair permeability; air leakage; air barrier material; air barrier assembly; single-ply roof assembly; polymer-modified bitumen roof assembly
AbstractThe National Research Council of Canada (NRCC) in collaboration with the Canadian Roofing Contractors Association (CRCA), National Roofing Contractors Association (NRCA), Roofing Industry Alliance for Progress, and the Single-Ply Roofing Institute (SPRI) addressed the issue of air movement in roof assemblies through a research and development project designated air movement impacts on roof Systems (AIR). The AIR steering committee developed goals for a two-phase testing program: Phase 1, quantify air permeances of single-ply and polymer-modified bitumen membrane materials; and Phase 2, quantify air leakage rates of seam-fastened mechanically attached single-ply and polymer-modified bitumen roof membrane assemblies. In Phase 1, four roof membrane materials were tested using ASTM E2178 test protocol to measure the air permeability rates. The tested materials meet the air permeability criterion of ASHRAE 189.1, ASHRAE 90.1, and the International Energy Conservation Code (IECC) for effective air barrier materials. In Phase 2, a test method for measuring air leakage rates across membrane roof assemblies was developed. Test assemblies were constructed with seam-fastened mechanically attached Phase 1 roof membrane materials, rigid board roof insulation, and steel roof decks. Each test assembly also included five common roof penetrations flashed in accordance with the manufacturers' installation instructions. The results demonstrated that the tested assemblies comply with ASHRAE 189.1, ASHRAE 90.1, and the IECC air leakage requirement for effective air barrier assemblies. An ASTM work item under the D08 committee is underway on the developed test method for measuring air leakage rates across membrane roof assemblies.
Publication date
LanguageEnglish
AffiliationConstruction; National Research Council Canada
Peer reviewedYes
NPARC number23001004
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Record identifierc4eb21ae-5c7a-45bf-9d40-9d65c9e53726
Record created2016-11-25
Record modified2017-04-05
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