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Extruded polystyrene insulation (XPS) is by far
the preferred choice for use in low temperature building roofs
because of its high resistance to moisture absorption, and,
because of it’s ability to maintain R-value in the presence
of moisture. Lasting R-value is essential to controlling the
long-term operating costs of low temperature facilities.
XPS insulation is suitable for use in many types
of roofing systems including single-ply, built-up, and modified
bitumen, in both conventional below the membrane applications, and,
in protected roof membrane assemblies (PMRA)
in which insulation is placed above the membrane. Low temperature
roofing assemblies should be evaluated for effectiveness and placement
of vapor retarders to avoid condensation and subsequent deterioration
of the building envelope components.
Durable XPS stands up to the rigors of jobsite
handling and is available in a variety of sizes and thicknesses.
XPS insulation is easily cut to needed lengths by scoring
with any common knife and breaking.
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