THERMADRAIN IS ONLY MANUFACTURED FROM THE HIGHEST R-VALUE INSULATION PROVIDED BY THE DOW CHEMICAL CO.
EXTRUDED POLYSTYRENE
1” = 5.0 “R” VALUE
2” = 10.0 “R” VALUE
3” = 15.0 “R” VALUE
POLYSOCYANURATE
1.5” = 9.8 “R” VALUE
2” = 13.0 “R” VALUE
2.5” = 15.8 “R” VALUE
3” = 19.0“R” VALUE
