| Specification
Reference: ASTM C 578-91a |
|
Type
I |
Type
VIII |
Type
II |
Type
IX |
| Property |
|
Units |
ASTM Test |
|
|
|
|
| Density, minimum |
|
(pcf) |
C 303 or D 1622 |
0.90 |
1.15 |
1.35 |
1.80 |
| Density Range |
|
|
|
0.90 - 1.14 |
1.15 - 1.34 |
1.35 - 1.79 |
1.80 - 2.20 |
| Thermal Conductivity |
at 25 F |
BTU/(hr.) |
c 177 or c 518 |
0.23 |
0.22 |
0.21 |
0.20 |
| K Factor |
at 40 F |
(sq.ft.)(F/in.) |
|
0.24 |
0.235 |
0.22 |
0.21 |
| Thermal Resistance |
at 25 F |
at 1 inch |
|
4.35 |
4.54 |
4.76 |
5.00 |
| R-vaiue* |
at 40 F |
thickness |
|
4.17 |
4.25 |
4.55 |
4.76 |
| Strength Properties |
|
|
|
|
|
|
|
| Compressive 10% Deformation |
|
psi |
D1621 |
10-14 |
13-18 |
15-21 |
25-33 |
| Flexural |
|
psi |
C203 |
25-30 |
30-38 |
40-50 |
50-75 |
| Tensile |
|
psi |
D1623 |
16-20 |
17-21 |
18-22 |
23-27 |
| Shear |
|
psi |
D723 |
18-22 |
23-25 |
26-32 |
33-37 |
| Shear Modulus |
|
psi |
---- |
280-320 |
370-410 |
460-500 |
600-640 |
| Modulus of Elasticity |
|
psi |
---- |
180-220 |
250-310 |
320-360 |
460-500 |
| Moisture Resistance |
|
|
|
|
|
|
|
| WVT |
|
perm. in |
E 96 |
2.0-5.0 |
1.5-3.5 |
1.0-3.5 |
0.6- 2.0 |
| Absorption (vol.) |
|
% |
0 272 |
less than 4.0 |
less than 3.0 |
less than 3.0 |
less than 2.C |
| Capillarity |
|
|
|
none |
none |
none |
none |
| Coefficient of Thermal Expansion |
|
in./(in.)(F) |
D696 |
0.000035 |
0.000035 |
0.000035 |
0.000035 |
| Maximum Service Temperature |
F |
- |
|
|
|
|
|
|
|
Long-term exposure |
|
167.00 |
167.00 |
167.00 |
167.00 |
|
|
Intermittent exposure |
|
180.00 |
180.00 |
180.00 |
180.00 |
| Oxygen index |
|
% |
D 2863 |
24.00 |
24.00 |
24.00 |
24.00 |
| *R-value means the resistance to heat
flow. The higher the R-value, the greater the resistance to
heat flow. |
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| For residential roof construction refer
to SPI's Roof, Wall and Foundation Design Ideas. |
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The above physical characteristics of
EPS printed in blue above are not addressed in ASTM C 578. |
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Though the information presented in this bulletin |
finished product by the customer. Further, noth |
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is
offered in good
faith and believed to be |
|
ing contained herein should be construed as an |
|
|
accurate, ALL STATEMENTS AND SUGGES- |
inducement or recommendation
to use any |
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|
TIONS ARE MADE WITHOUT
WARRANTY, EX- |
particular company's product. SPI does not |
| The Society of the Plastics Industry,
Inc. |
PRESS OR MPLIED, INCLUDING ANY IMPLIED |
endorse any particular company's product. The |
| Insulation Board Council |
WARRANTIES OF MERCHANTABILITY
OF FIT- |
Society of the
Plastics Industry,
Inc., ARCO |
| Expanded Polystyrene Division |
NESS
FOR ANY PURPOSE. The typical values |
Chemical Company, BASF corporation,
Scott |
| 1275 K Street, NW, Suite 400 |
contained herein are properties believed to be |
Polymers and Huntsman
Chemical, singularly |
| Washington, DC 20005 |
representative of all
EPS insulation meeting |
and collectively, disclaim any liability
that may |
| (202) 371-5200 |
federal specifications, and
were obtained
using |
|
be claimed for infringement of the patents
of the |
|
|
test specimens prepared
in the laboratories
of |
third parties. |
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ARCO Chemical Company,
Huntsman Chemical |
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company and BASF corporation. They are not to |
This brochure
was developed to assist
archi |
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|
be used as raw
material specifications nor as- |
|
tects, specifiers and others who are
select |
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|
sumed to be identical
to values obtained
on the |
ing insulation materials for
commercial |
| |
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roofing applications. |
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