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A series of T-Peel lap seam adhesion tests were conducted on various EPDM roof membrane samples in order to characterize the typical expected seam strength in laboratory prepared samples, and in samples taken from new and in-service roofs. The program included constructing lap seams in the laboratory using four commercially available EPDM roof membranes and their proprietary adhesives and seaming techniques. In addition, two sets of seams were made and tested in the laboratory without the benefit of cleaning the splice area of the rubber. T-peel testing was also conducted on samples taken from two roofs that were approximately 6 months and 5 years in age. Three other sets of contractor prepared field seams were obtained during on-site roof construction and tested in T-peel. The objective of the study was to provide some reference data relative to seam strength developed in the laboratory versus that which is typically achieved in the field.
EPDM, T-peel test, lap seam, adhesion, strength development, single-ply, field seams, butyl, adhesive, neoprene adhesive, in-service
Senior Materials Engineer, Law Engineering, Chantilly, Virginia