Gordon from Montreal writes asking about the use of Celotex foam insulation (with aluminium foil cladding on both sides- 4 X 8 sheets). He writes:
"For your information, the Celotex product is considered by many, to be a premium insulator for residential installations. Ironically it is made in C...
Common Name: Cellulose Fiber, ground up newspapers.
Colour: Grey or white.
Thermal Resistance: RSI - .025/mm R - 3.6/in. Good
Cost: Lowest plus blower. (The only blowers that can be rented by homeowners)
Capacity to dry out if wet: Fair to poor
Fire Resistance: Good to Fair (Borax can leach ...
Example: Styrofoam products by Dow (by the way, Styrofoam is a Dow Chemical brand name and not a generic term for foam insulation).
Colour: Blue (Dow) or Pink (Celfort)
Thermal Resistance: RSI - .035/mm R - 5.0/in. Very high.
Cost: high
Capacity to dry out if wet: Won't get wet
Fire Resistan...
