Re: Spray foam insulation in Vented Attic?
- From: Rick Blaine <dont@xxxxxxxxxx>
- Date: Sat, 30 Jun 2007 10:26:43 -0600
kio.ami@xxxxxxxxx wrote:
I have a standard early 1980s suburban house in Texas with a vented
roof. The A/C unit ductwork is in the attic, but only the attic floor
is insulated (blown fiberglass). Obviously, this isn't an efficient
use of the A/C unit since the attic heats up the cool air in the
ductwork before it reaches us.
Assuming the blown in insulation is up to spec, I'd bet you get a far better
payback by making sure all the ac ducts are sealed and insulated and that the
attic is well ventilated. Look into things like a ridge vent with lots more
soffit vents. Worse case, you could put a power vent in there as well, but you
still will need lots of soffit vents.
However, I've been looking at open cell spray-on foam insulation for
the roof deck -- specifically Sealection 500 -- and every review I've
seen said that it works beautifully. Ideally, it's supposed to be
used with an unvented attic, but I was wondering if it'd buy you
anything in a vented attic. My semi-educated guess is yes, but I'd be
interested in hearing educated opinions.
If you insist on spraying foam, you could look at this:
http://www.tigerfoam.com/ but I suspect you will be wasting money at best and
creating a bigger problem worse case.
--
"Tell me what I should do, Annie."
"Stay. Here. Forever." - Life On Mars
.
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