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 If you want the tightest, most efficient and comfortable house
possible then you need Handi-Foam Two-Component Foam
Spray Insulation in your walls. Consider that heating oil is priced
at nearly 2.00 /gallon and the slight extra cost of adding foam
to your renovation or new home project becomes insignificant. Unlike
fiberglas batts, sprayed foam between the wall studs provides a
complete air barrier plus R-7 per every inch of cured foam. Handi-Foam
is a closed cell product that repels moisture. This feature prevents
mold and mildews from taking hold in your walls. For the slight
additional cost of foaming your walls you receive a tight, draft
free home that is much more economical to heat or cool and also
provides a barrier to moisture, insects and exterior noise. For
insulating existing closed wall cavities please see our product
description for Handi-Foam SR Slow Rise foam.
The ultimate insulation job would be to completely fill the space
between the studs. A more economical approach would be to spray
1” of Handi-Foam between the wall studs then finish with a
3-1/2” fiberglass batt. By using an initial layer of foam
you can greatly improve the efficiency of your insulation by blocking
the passage of air through your walls. This 2 step approach will
yield a minimum R-18 in a 2x4 wall and in a 2 x 6 wall you can go
with an R-19 batt for an R-26 rating. To calculate the number of
kits needed to do your job, divide the total square feet to be sprayed
by the board feet capacity of the Handi Foam kit.
Example: 16” (1.25 ft) wide a 9 ft tall between the joists.
Total area between the wall studs = 11.25 square feet. You have
to insulate between 50 studs for a total of 563 square feet. ( Divide
563 S.F. by our II-605 Kit (605 board foot kit) = less than 1 kit
needed with a little left over for touch ups if required. This calculation
is based on achieving a consistent 1” depth of cured foam.
Please see this video for an illustration of the proper spraying
technique for insulating between wall studs using a Handi-Foam kit.
Watch the video.
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