Which is better, easier - caulking the gap between the drywall and the floor
by pulling back the carpet and baseboard or sealing the open drywall joints
in the attic? I'm leaning towards the attic but it's probably more effective
to seal closer to the heated room. I noticed alot of staining on the bottom
of the insulation where air infiltrates into the attic from interior walls
so there is significant leakage.
No real expertise here just an opinion. It is impossible say where the air
that is staining the attic insulation is coming from. The cold air that
enters around an unsealed baseboard is definitely entering the heated air
space of your home. I just used 30 tubes of caulk on a very small house to
seal all visible gaps around the perimeter where the osb met the stud walls
and the floor met the studs. As soon as the drywall is finished I will
repeat the process between the bottom of the drywall and the floor. To prove
how much I believe this I will add, this is for a rental property where I do
not pay the utilities.
the spray foam is real insulation. the caulk just stops the breeze (as does
the foam thingies) but the wall still gets colder than with foam. mostly
you need it behind the box where the outside wall is unless the regular
insulation isnt tight to the box.
with the nozzle attached to the can of spray foam. the ones ive used have a
straw taped to the side. if you have room on the top to stick the nozzle in
thats good, you may have to trim a bit of drywall that he plate will still
or you can use an existing hole in the box to get the nozzle through.
I use a metal coat-hanger.
You can wash out the tube with acetone to get rid of most of the wet foam,
then ream it with a coat hanger. Leave the hanger in there, then pull it
out when you want to use it again.
that said, it will never work as good as the first day. at least in my
experience it doesnt...
ive gotten in the habit of getting a cans worth of stuff ready to foam then
shooting it all at once. but even if you waste some, its not all that
With the poly stuff, I heard leaving a big gloob at the end of the
tube, overhanging will harden and keep the tube portion 'uncured',
then you only have to break off the piece, or snip a small part of the
tube, to get access to the fresh stuff and start spraying/foaming
I started using the DAP latex stuff, it water cleans up, and is
REMOVABLE from clothing and hands.
Man can I make a mess. :)
tom @ www.CarFleaMarket.com
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