SYMPOSIA PAPER Published: 01 January 1990

Strain Energy and Elongation Behavior of Field Samples Taken from Polyester Reinforced Built-Up Roofs


A laboratory study was undertaken to determine the load-strain properties and watertight/strain levels of aged polyester reinforced built-up roof membranes. Tests were run at 0°F on field samples of roof membranes ranging in age from three to five years. One sample of a glass and polyester reinforced membrane was also evaluated. Strain energy values were determined for all specimens tested. A three point watertight integrity test was devised, using a prestressing level of first yield, average ultimate strain, and end point strain.

Author Information

Dupuis, RM
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Developed by Committee: D08
Pages: 210–222
DOI: 10.1520/STP26564S
ISBN-EB: 978-0-8031-5146-8
ISBN-13: 978-0-8031-1393-0