THERMAX White Finish
THERMAX™ White Finish polyiscoyanurate insulation is designed as an insulation and interior finish system for interior masonry or concrete walls, plus walls and ceiling in metal, wood post frame, and concrete or masonry buildings, as governed by building codes. The glass-fiber-reinforced polyisocyanurate foam core of THERMAX White Finish is faced with nominal 1.25 mil embossed white acrylic coated aluminum on one side and 0.9 mil smooth aluminum on the other. It can be pressure washed up to 1,000 psi with a 15-degree or greater spray tip (15 a minimum of 3' distance). It can be installed exposed to the interior without a thermal barrier.
Ease of application:
Easy-to-handle THERMAX insulations require no special tools or materials for installation. Simply use a utility knife and a straight edge to cut the boards to size. Then adhere directly to basement walls with an approved adhesive.
For extra protection against air and moisture and a more finished appearance use one of the joint closure systems from Dow, or tape seams with THERMAX white foil tape or aluminum foil tape.
THERMAX insulations are backed with a 15-year limited thermal warranty.
Nominal
Board
Thickness** |
R-Value,1 |
Board Size |
Edge Treatment |
Min
Compressive
Strength |
| .50 |
3.3 |
4' x 8'/4' x 9'/4' x 10' |
Butt Edge |
25 psi |
| .75 |
5.0 |
4' x 8'/4' x 9'/4' x 10' |
Butt Edge |
25 psi |
| 1.0 |
6.5 |
4' x 8'/4' x 9'/4' x 10' |
Butt Edge |
25 psi |
| 1.25 |
8.0 |
4' x 8'/4' x 9'/4' x 10' |
Butt Edge |
25 psi |
| 1.50 |
9.8 |
4' x 8'/4' x 9'/4' x 10' |
Butt Edge/Shiplap |
25 psi |
| 1.55 |
10.0 |
4' x 8'/4' x 9'/4' x 10' |
Butt Edge/Shiplap |
25 psi |
| 1.75 |
11.4 |
4' x 8'/4' x 9'/4' x 10' |
Butt Edge/Shiplap |
25 psi |
| 2.0 |
13.0 |
4' x 8'/4' x 9'/4' x 10' |
Butt Edge/Shiplap |
25 psi |
Building Code Compliance Information
Complies with ASTM C 1289 Type I, Class 2. Meets IBC/IRC requirements for foam plastic insulation. See NES NER 681.
**Not all product sizes are available in all regions.
R means resistance to heat flow. The higher the R-value, the greater the insulating power. R-values are expressed in ft2 "h "°F/Btu.
Vertical compressive strength is measured at 10% deformation or at yield, whichever occurs first.
1 R-value determined by ASTM C518.
