Quote:
Originally Posted by Death2Theft
Thing I dont get about insulation is why people waste money on insulation that can be damaged by water vs spray foam/foam panels.
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Money.
Spray foam is expensive in comparison to fiberglass, rock wool or cellulose and the majority of clients just don't care what's behind the drywall. The exception was the client who 220k in spray foam, he literally insulated every single wall in the house with the most expensive product available.
If you go with closed cell foam, you don't even need to worry about vapour barrier, it will stop passage of air directly at the sheathing.
In general however, spray foam is worth the cost. The measure of quality of a traditional insulation install is the fitment of the batts; if the installer crushes a piece of batt insulation a bit to fit it into place you loose R value, if they don't trim the batt perfectly to fit you have air leakage. No matter who does the installation, all those little air leaks add up to the equivalent of leaving a window or door open year round. Spray foam doesn't have the problem, it's provides a 100% perfect seal. Imagine how much higher a homes energy bills would be if it had a door open year round, that fact alone should make spray foam worthwhile. That's just one of a number of benefits.