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Cellofoam North America Inc

 

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Tapered/Expanded Polystyrene Roof Insulation

TAPERED ROOF INSULATION

Designed to provide positive drainage of water. The added thickness to produce slope to drain is a positive factor in today’s energy conscious society.
The roof consists of pre-designed pieces of expanded polystyrene having a slope of 1/8 , 3/16 or 1/4 per foot as required.
This product can be supplied in various densities. (See product description or physical properties chart).
Each piece is labeled as it is manufactured to coincide with the actual shop drawing, thus eliminating guess-work by the installers as to the placement of the insulation.
Saddles and crickets are available as required.
Typical Physical Properties of EPS Insulation
Property Units ASTM Test Density (pcf)
1.0 1.25 1.5 2.0
Thermal Conductivity
at 25F BTU/ (hr.) C177 or 0.23 0.22 0.21 0.20
K Factor
at 40F (sq. ft.) (F/in.) C518 0.24 0.235 0.22 0.21
at 75F
0.26 0.255 0.24 0.23
Thermal Resistance at 25F per inch

4.35 4.54 4.76  5.00
Values (R) at 40F thickness ______ 4.17 4.25 4.55 4.76
at 75F 3.85 3.92 4.17 4.35
Strength Properties

Compressive 10% Deformation psi D1621
10-14 13-18 15-21 25-33
Flexural
psi C203
25-30 32-38 40-50 55-75
Tensile
psi D1623
16-20 17-21 18-22 23-27
Shear
psi D732
18-22 23-25 26-32 33-37
Shear Modulus
psi _____ 280-320 370-410 460-500 600-640
Modulus
psi _____ 180-220 250-310 320-360 460-500
Moisture Resistance
WVT
perm in.
C355 1.2-3.0 1.1-28 0.9-2.5 0.6-1.5
Absorption (vol.)
% C272 < 2.5 < 2.5 < 2.0 < 1.0
Capillarity
_____
_____ none none none none
Coefficient of
CThermal Expansion in./(in.) (F) D696 0.000035 0.000035 0.000035 0.000035
Maximum Service Temperature F _____



Long Term
167 167 167 167
Intermittent
180 180 180 180
Thermal Efficiency -
EPS Roof Insulation
Thickness R Value C Factor
2" 8.3 .12
2.5" 10.4 .10
3" 12.5 .08
3.5" 14.6 .07
4" 16.6 .06
5" 20.8 .05
6" 25.0 .04
8" 33.2 .03

NOTE: Values based on thermal conductivity (k) at 40º F mean test temperature for normal 1.0 pcf density EPS.


Typical "U" Values - Roof Systems
Deck Type EPS or EPS/Composite
C Factor
.10 .05 .03
Metal deck .090 047 .029
Poured gypsum
(2.5") 077 043 .028
Lightweight
concrete (2.5") 072 042 .027
Structural
concrete (4") 087 046 .029
Wood (nominal 1") 083 045 .029

NOTE: Calculations based on ASHRAE handbook procedures and assume winter heat flow conditions.

The performance data herein reflects Cellofoam's expectation based on tests conducted in accordance with recognized standard methods. The sale of these products shall be subject to the terms and Conditions of Sale, INCLUDING those LIMITING WARRANTIES, as set forth in Cellofoam's invoices.
No agent, employee or representative of Cellofoam or its subsidiary or affiliated companies is authorized to modify this disclaimer.

Like many construction materials, expanded polystyrene insulation is combustible. It should not be exposed to flame or other ignition sources. Consult installation instructions and current model building code requirements before use.


Tapered/Expanded Polystyrene Roof Insulation Tapered/Expanded Polystyrene Roof Insulation (235 KB)

     

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