I got prices for spray foam and batt insulation. Very expensive to go
with spray foam. For a garage that is 30' wide and 25' deep and 14'
high I got a price of $1100 plus tax, plus costs for vapour barrier
afterwards. For batt insulation $700 and that's vapour barrier
included ! In short it's twice the amount for spray foam.
Huge cost difference
Did they provide estimates of the resulting "R" value for each option?
While foam maybe more $ (and for a garage not needed) it should provide
a tighter seal, better R value and a continuous vapor barrier as
opposed to the batts with a vapor barrier open at each stud.
Section 31 wrote:
Depending upon the formula, spray foam is also less toxic, both in
terms of the material itself, and in terms of the lessor potential
problem for mold. Foam also blocks insect entry better, and won't sag.
Tony Hwang wrote:
And in many climates, R19 fiberglass will decay to R9 in just a few
months to years. Any of humid micro climates in the USA has this
problem so most of the southeast has far lower R values than they
think. To some great degree, in these climates, you get what you pay
for. Fiberglass and Cellulose are just poor products to use in these
environments and we keep pouring in more good money for a product that
keeps failing us.
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