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EPS Foam
EPS is a unique product that can be manufactured in a wide range of densities and strengths. Most commonly EPS is supplied in a density range from 0.9-2.4 lbs/ft3. The performance properties of EPS in this density range are covered by industry standard ASTM C578. However, some applications require higher strength than covered by ASTM C578.

R-Control EPS can be manufactured to custom high strength performance levels for application subjected to high load conditions. Examples of high strength EPS properties are shown below:
Concrete Void
Dry Wall Backer


High Density EPS Properties1 40 PSI 50 PSI 60 PSI
ASTM C578 Type XIV - -
Compressive strength @10% def., min. psi
(kPa)
40
(256)
50
(345)
60
(414)
Density, min. lb/ft 3
(kg/m3)
2.4
(38.4)
2.7
(43.2)
3.0
(48.0)
Design Thermal Resistance
per 1.0 in. thickness
40ºF ºF•ft2•h/Btu
(ºC•m2/W)
4.76
(0.84)
4.76
(0.84)
4.76
(0.84)
75ºF ºF•ft2•h/Btu
(ºC•m2/W)
4.35
(0.77)
4.35
(0.77)
4.35
(0.77)
Thermal Resistance,min.,
per 1.0 in. thickness
40ºF ºF•ft2•h/Btu
(ºC•m2/W)
4.60
(0.81)
4.60
(0.81)
4.60
(0.81)
75ºF ºF•ft2•h/Btu
(ºC•m2/W)
4.20
(0.74)
4.20
(0.74)
4.20
(0.74)
Flexural strength, min. psi
(kPa)
60
(414)
70
(483)
80
(552)
Water Vapor Permeance of 1.0 in. thickness,
max., perm
2.5 2.5 2.5
Water Absorption by total immersion,
max., volume %
2.0 2.0 2.0
Oxygen Index min., volume % 24.0 24.0 24.0
1 When test in accordance with ASTM C578 Test Methods.


Download a PDF file of our 40 PSI EPS Brochure.
Downloadable EPS Brochure

Download a PDF file of our EPS Product Testing Chart.
Downloadable EPS Brochure



Video 
Learn more about Expanded Polystyrene (EPS)


Industry Links
EPSMA
AFPR
SIPA
ICFA
Energy Star
USGBC

EPS Applications
Fabricated EPS
Drywall Backer
Exterior Sheathing
Flotation
Perimeter Underslab
Void Fillers


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