|
Specification |
|
Type |
Type |
Type |
Type |
||
|
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.
For residential roof construction refer to SPI’s Roof, Wall and Foundation Design Ideas.
The above physical characteristics of EPS printed in blue above are not addressed in ASTM C 578.