Field Test Results of Experimental EPDM (Ethylene Propylene Diene Monomer) and PUF (Polyurethane Foam) Roofing

摘要

This report presents the results of 2 years of study of ethylene propylene diene monomer (EPDM) and sprayed-in-place polyurethane foam (PUF) roofs following their installation. Initial samples taken from the materials is delivered were tested to establish initial characteristics. Further samples were cut from the roofs every 6 months for 2 years to determine what changes were occurring from natural aging. Thermocouples and strain gages were also used to study response of the roof systems to changes in ambient conditions. The EPDM shosed an increase in mechanical properties during the first 6 to 12 months, probably due to completion of the curing process, followed by no significant change in properties for the rest of the test period. There was little consistency to the results of PUF during the same time of exposure. This could happen for several reasons: differences among PUF products used, application techniques, and inconsistent atmospheric conditions during application. Test results indicated that both EPDM and PUF, when properly installed, will perform satisfactorily.