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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.
Considering the price of home heating oil in today's
economy, the 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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