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| Contractors and
architects are increasingly finding that roofing systems
using expanded polystyrene (EPS) can meet the needs of the
most demanding building requirements. EPS offers measurable
energy savings, long-term R-value, effective water
resistance, dimensional stability and strength when properly
installed and protected from moisture. These systems may
include flat and/or tapered foam insulation for use in
traditional built-up assemblies and most single ply membrane
systems. |
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| Expanded
polystyrene is molded into large blocks and then cut to
obtain the desired pitch, ranging from 1/16" per foot or
greater. Tapered EPS insulation provides the required
positive slope to drain while retaining the structural and
economic advantages of a flat roof deck. EPS can be applied
in a single layer creating a continual form. This design
versatility translates into considerable savings in labor
and framing costs. Usually the ridges and valleys necessary
to provide correct drainage are supplied at 45° increments
to the horizontal, but custom angles can easily be
furnished.
Moisture is extremely
detrimental to any roofing system. The purpose of the
membrane is to keep the water out. However, in the event of
water penetration, EPS has been shown to effectively resist
moisture and retain its mechanical properties. The moisture
content of EPS insulation samples ranging in age from 6 to
15 years was found to be very low, i.e., a maximum of 0.04%
by volume. Likewise, results for R-value performance
indicated no deterioration in R-value over time, meaning EPS
thermal resistance values may be used without adjustments
for aging. |
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| Tapered EPS Board |
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| Custom EPS Valley |
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| Custom EPS Hip |
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| EPS roof
insulations are compatible with most commercial roofing
systems, including, but not limited to built up roofing and
modified bitumen systems and single-ply membrane systems
that are either ballasted, mechanically fastened or fully
adhered. Expanded polystyrene insulation meets the
requirements of ASTM C 578 Standard Specification for Rigid,
Cellular Polystyrene Thermal Insulation. When specifying EPS
insulation using ASTM C 578, the best possible product
selection is ensured. |
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