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putting on insulation backwards

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putting on insulation backwards Eigenvector 02-22-2007
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Posted by Eigenvector on February 22, 2007, 11:34 pm


On one wall I have to install insulation, but unfortunately its going to be
installed on the wrong side of the wall for the vapor barrier. I personally
haven't found a source for insulation that doesn't have a vapor barrier -
otherwise this would be a moot point, but I'm wondering if I can just push
the insulation into the wall - vapor barrier and all. It should stay put
from friction but I didn't want to just start stuffing it in there and have
it turn out to be a bad idea.



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Posted by Michael B on February 22, 2007, 11:40 pm


You can slice the vapor barrier, many cuts, with a carpet knife.

> On one wall I have to install insulation, but unfortunately its going to be
> installed on the wrong side of the wall for the vapor barrier. I personally
> haven't found a source for insulation that doesn't have a vapor barrier -
> otherwise this would be a moot point, but I'm wondering if I can just push
> the insulation into the wall - vapor barrier and all. It should stay put
> from friction but I didn't want to just start stuffing it in there and have
> it turn out to be a bad idea.



Posted by on February 23, 2007, 7:46 am


> On one wall I have to install insulation, but unfortunately its going to be
> installed on the wrong side of the wall for the vapor barrier. I personally
> haven't found a source for insulation that doesn't have a vapor barrier -
> otherwise this would be a moot point, but I'm wondering if I can just push
> the insulation into the wall - vapor barrier and all. It should stay put
> from friction but I didn't want to just start stuffing it in there and have
> it turn out to be a bad idea.

The vapor barrier on fiberglass insulation can be peeled off quite
easily.

I last bought fiberglass insulation in 2000. There were several
choices of "no-vapor-barrier" insulations available then. Are you
sure you looked hard enough?

-Jason


Posted by Joseph Meehan on February 23, 2007, 11:20 am


Eigenvector wrote:
> On one wall I have to install insulation, but unfortunately its going
> to be installed on the wrong side of the wall for the vapor barrier. I
> personally haven't found a source for insulation that doesn't have
> a vapor barrier - otherwise this would be a moot point, but I'm
> wondering if I can just push the insulation into the wall - vapor
> barrier and all. It should stay put from friction but I didn't want
> to just start stuffing it in there and have it turn out to be a bad
> idea.

If I understand you correctly you are working from the cold side so the
vapor barrier should be on the other side. Yes you normally could use just
friction fit. As noted the barrier usually comes off easy or you can slit
it if that is not possible. I would use friction fit to keep the barrier
where it belongs.

--
Joseph Meehan

Dia 's Muire duit




Posted by Eigenvector on February 23, 2007, 10:51 pm



> Eigenvector wrote:
>> On one wall I have to install insulation, but unfortunately its going
>> to be installed on the wrong side of the wall for the vapor barrier. I
>> personally haven't found a source for insulation that doesn't have
>> a vapor barrier - otherwise this would be a moot point, but I'm
>> wondering if I can just push the insulation into the wall - vapor
>> barrier and all. It should stay put from friction but I didn't want
>> to just start stuffing it in there and have it turn out to be a bad
>> idea.
>
> If I understand you correctly you are working from the cold side so the
> vapor barrier should be on the other side. Yes you normally could use
> just friction fit. As noted the barrier usually comes off easy or you can
> slit it if that is not possible. I would use friction fit to keep the
> barrier where it belongs.
>
> --
> Joseph Meehan

Alright, just checking. Another person asked why I wasn't looking too hard
for non-backed insulation and the answer to that was because I have a bunch
of rolls of backed insulation already.



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