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Wall insulation question BZ 04-28-2007
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Posted by BZ on April 28, 2007, 10:31 pm


I'm replacing the wall insulation in a free-standing one-room building
built in 1977. The studs are 13 inches apart, and the original
Kraft-batted fiberglass insulation is 13 inches wide. Can you still buy
13-inch wide fiberglass insulation anywhere?

And what about some of the other insulation options available, such as
polystyrene and Reflectrix -- are those worth looking into? Does
Reflectrix work on its own, or only in addition to something like
fiberglass?

Thanks!

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Posted by hallerb@aol.com on April 28, 2007, 10:33 pm


> I'm replacing the wall insulation in a free-standing one-room building
> built in 1977. =A0The studs are 13 inches apart, and the original
> Kraft-batted fiberglass insulation is 13 inches wide. =A0Can you still buy
> 13-inch wide fiberglass insulation anywhere?
>
> And what about some of the other insulation options available, such as
> polystyrene and Reflectrix -- are those worth looking into? =A0Does
> Reflectrix work on its own, or only in addition to something like
> fiberglass?
>
> Thanks!

use expanding foam, it costs more but is R6 per inch, the building
will be much quieter, since foam cuts air and noise infiltration a
lot.


Posted by Edwin Pawlowski on April 28, 2007, 10:53 pm



> I'm replacing the wall insulation in a free-standing one-room building
> built in 1977. The studs are 13 inches apart, and the original
> Kraft-batted fiberglass insulation is 13 inches wide. Can you still buy
> 13-inch wide fiberglass insulation anywhere?
>
> And what about some of the other insulation options available, such as
> polystyrene and Reflectrix -- are those worth looking into? Does
> Reflectrix work on its own, or only in addition to something like
> fiberglass?

Owns Corning comes in 15 or 23" wide. Foam board will work, but it comes in
sheets and has to be cut. If you need 13", you won't get that easily from a
24" or 48" wide board.

Consider the spray in foam. Probably will cost a bit more, but would do a
very good job.



Posted by BZ on April 29, 2007, 1:26 am


Edwin Pawlowski wrote:

> Consider the spray in foam. Probably will cost a bit more, but would do a
> very good job.

That might be the way I have to go just because the other options would
be so labor-intensive. But my Googling says that this is a
professionals-only technique. I was hoping for a cheaper alternative.

Posted by ransley on April 29, 2007, 8:51 am


> Edwin Pawlowski wrote:
> > Consider the spray in foam. Probably will cost a bit more, but would do a
> > very good job.
>
> That might be the way I have to go just because the other options would
> be so labor-intensive. But my Googling says that this is a
> professionals-only technique. I was hoping for a cheaper alternative.

The best is blown in foam, forget Reflextic. Foamboard
Polyisocyanurate R .7.2" is also an option. You will get a payback
with better insulation


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