On Jan 17, 12:58*am, Aaron Fude wrote:
Hi,

In the following picture, you are looking at a gap between my roof
(with a skylight) and an interior stone wall (which used to be
exterior before the addition). The roof structure is old and the roof
shingles were recently installed by a fantastic roofing company. There
are no leaks of any kind so that's not a worry.

http://freeboundaries.com/roofgap.jpg

However, there is lots of cold air coming through that gap. So I would
like to shoot some foam into that space. But how can I do it and make
sure that it sticks and also, how do I make sure that I don't muck up
the stone that I am leaving explosed. That beam that's runs along the
stone looks like a 2x8 so I want to shoot the foam 7 1/2 inches high.
I can just see the stuff you buy at HD in cans falling out and messing
up the stones and not really insulating all that well. (Maybe I can
put a longer attachment that will place it deaper?) Anyway, I'm
looking for advice on how to deal with it.

Many thank in advance,

Aaron

To me the stone looks rough, dirty with mortar on it. A chisel will
remove mortar, Muriatic acid will clean it. For foam sheet plastic
ductaped under the opening to keep foam off then cut it. Foam cans
need to be upside down, to just extend the hose it will come out real
slow or almost not at all. If I remember I slipped a bigger hose over
the cans hose and heated the can in hot water to get it out. it
expands so its hard to control.