November 2004
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Benefits and uses of EPS

Benefits and uses of EPS 3.8 stars3.8 stars3.8 stars3.8 stars3.8 stars

by Betsy Steiner
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Roof assemblies are one of the largest and most important expenditures building owners make. These significant investments typically include a roof deck, waterproofing membrane, insulation, installation, maintenance and repair. Contractors and roof system designers are finding that roof systems incorporating expanded polystyrene (EPS) insulation can meet demanding building requirements.

EPS is a closed cell, lightweight, resilient foamed plastic insulation. It offers measurable energy savings, long-term R-value, effective water resistance, and dimensional stability when properly installed and protected from moisture. EPS insulation is compatible with all commercial roof systems, including but not limited to built-up roof (BUR); modified bitumen; and single-ply membrane systems that are either ballasted, mechanically fastened or fully adhered. EPS insulation meets the requirements of ASTM C578-04, "Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation," and CAN/ULC-S701-01, "Standard for Thermal Insulation, Polystyrene Boards and Pipe," the material standards that cover the types, physical properties and dimensions of cellular polystyrene intended for use as thermal insulation in the United States and Canada.

Following are some considerations regarding EPS insulation use.



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