A glass-fiber-reinforced polyisocyanurate foam core faced with nominal
16.5 mil embossed white acrylic-coated aluminum sheet laminated to plain 1 mil
aluminum on one side and 1 mil plain aluminum on the other side. Can be
installed exposed to the interior without a thermal barrier.
Applications
THERMAX Heavy Duty Plus is used for exposed wall and/or ceiling insulation
in agricultural, commercial, and industrial buildings, such as factories,
warehouses, farm buildings, retail establishments, cold storage structures,
and similar facilities.
Not all sizes available for all applications.
Dow is transitioning to a new blowing agent. As a result, current R-values are
changing. New R-values are referenced in the chart provided.
| THERMAX Heavy Duty |
|---|
Nominal Board Thickness
in. (mm) |
Current R-value1 |
Current R-value2 |
| .5 (12.7) |
3.6 |
3.3 |
| .75 (19.1) |
5.4 |
5.0 |
| 1 (25.4) |
7.2 |
6.5 |
| 1.25 (31.8) |
9.0 |
8.0 |
| 1.55 (38.1) |
10.8 |
10.0 |
| 1.75 (44.5) |
12.6 |
11.4 |
| 2 (50.8) |
14.4 |
13.0 |
| 2.5 (63.5) |
18.0 |
15.8 |
| 3 (76.2) |
21.6 |
19.0 |
1 R-values @ 75° F (24° C) mean temperature determined in accordance
with ASTM C236/C518.
2 R-value determined by ASTM C518
|
