Foam Insulation


Old 07-17-01, 02:40 PM
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I have a 100 year old home with wood siding.
The exterior walls have no insulation. Interior walls
are slat and plaster walls covered with sheetrock.

Because the siding is wood boards...the house leaks
air badly. Is there a way I can use foam insulation
by drilling a small hole in exterior wall....shoot the
liquid foam into the cavities and allow it to expand
and harden?

I know the product is sold in use for small
areas...but is there a way I can rent a machine that
has a nozzle through a small hole (1" ?) drilled
from the outside?

I want to inusltate and seal the house while doing it.
I don't want to cut large holes and use blown

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Old 07-20-01, 03:23 AM
Join Date: Mar 2000
Location: Arlington, WA
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Have cellulose blown into the walls. They will drill one or two of the same 1" holes in each stud cavity that you are talking about, and plug them when they are done. Get quotes and references from several contractors, and CHECK OUT THE REFERENCES! BLowing walls properly is difficult because most of the machines on the market have too much volume to do a wall properly.

The machines that contracors use to blow foam are not available to anybody other than factory trained contractors, and foam isn't blown into an enclosed cavity. They would remove ALL of the siding, blow the walls from the outside, cut off the excess after it sets up, then replace the siding.
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