| TYPICAL DESIGN
VALUES |
| Expanded Polystyrene
density |
1.5 lbs. / cu.
ft. |
| Average thickness
of EPS |
2.4" per side
(6" core); 2.5" per side (8" core) |
| R-Value of 1.5
lb. / cu ft EPS |
4.17 / inch |
| K-Factor of
1.5 lb. / cu ft EPS |
0.24 / inch |
| Average R-Value
Per Form |
20* (See Effective
R-Value) |
| Thermal mass
with concrete |
56 lbs. /sq.
ft. (6" core), 76 lbs. /sq. ft. (8" core) |
| Air Infiltration
Comparison |
25% versus wood
frame |
| *Effective R-value
for Polysteel Wall |
R26 to R30 |
| Water absorption
(volume) |
Less than 3%
(ASTM C272) |
| Water Vapor |
1.39 perm in. |
| Transmission
Breathability/permeability |
1.27 perms per
inch |
| Sound class |
48 with 1/2"
drywall |
| Fire Wall |
4 hours, without
the addition of any wall coverings to assist in its performance |
| EPS compressive
strength |
15-21 psi (10%
deformation) |
| Concrete compressive
strength |
3,000 psi (typical) |
| Concrete pouring
temperature |
Down to 0°F
(-18° C) |
