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Posted by sid on May 8, 2008, 9:37 am
Finishing the basement of a condo. I intend to insulate the outside
walls, but do I need to insulate the inside walls ? (the walls between
units), they are not cinder-block, they are poured.
Thanks
Sid.
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Posted by ransley on May 8, 2008, 9:45 am
> Finishing the basement of a condo. =A0I intend to insulate the outside
> walls, but do I need to insulate the inside walls ? (the walls between
> units), they are not cinder-block, they are poured.
>
> Thanks
>
> Sid.
How will you insulate outside and how well, concrete is a poor
insulator , insulating both sides is best, with foamboard.
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Posted by willshak on May 8, 2008, 10:05 am
on 5/8/2008 9:37 AM sid said the following:
> Finishing the basement of a condo. I intend to insulate the outside
> walls, but do I need to insulate the inside walls ? (the walls between
> units), they are not cinder-block, they are poured.
>
> Thanks
>
> Sid.
>
The outside of the basement is already insulated, with dirt.
I insulated my poured basement walls with studs, insulation and sheetrock.
The average year round temps down here, without any heat supply, is
between 62-75º F.
I do have the oil boiler and propane water heater down here, which
supplies a little heat in the winter, and the house AC helps cool it in
the summer, since cool air flows downward.
--
Bill
In Hamptonburgh, NY
To email, remove the double zeroes after @
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Posted by ransley on May 8, 2008, 10:15 am
> on 5/8/2008 9:37 AM sid said the following:> Finishing the basement of a c=
ondo. =A0I intend to insulate the outside
> > walls, but do I need to insulate the inside walls ? (the walls between
> > units), they are not cinder-block, they are poured.
>
> > Thanks
>
> > Sid.
>
> The outside of the basement is already insulated, with dirt.
> I insulated my poured basement walls with studs, insulation and sheetrock.=
> The average year round temps down here, without any heat supply, is
> between 62-75=BA F.
> I do have the oil boiler and propane water heater down here, which
> supplies a little heat in the winter, and the house AC helps cool it in
> the summer, since cool air flows downward.
>
> --
>
> Bill
> In Hamptonburgh, NY
> To email, remove the double zeroes after @
Dirt is not insulation, my freeze depth is 3.5ft, dirt transfers cold.
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Posted by on May 8, 2008, 11:55 am
>
>
>
>
>
> > on 5/8/2008 9:37 AM sid said the following:> Finishing the basement of a=
condo. =A0I intend to insulate the outside
> > > walls, but do I need to insulate the inside walls ? (the walls between=
> > > units), they are not cinder-block, they are poured.
>
> > > Thanks
>
> > > Sid.
>
> > The outside of the basement is already insulated, with dirt.
> > I insulated my poured basement walls with studs, insulation and sheetroc=
k.
> > The average year round temps down here, without any heat supply, is
> > between 62-75=BA F.
> > I do have the oil boiler and propane water heater down here, which
> > supplies a little heat in the winter, and the house AC helps cool it in
> > the summer, since cool air flows downward.
>
> > --
>
> > Bill
> > In Hamptonburgh, NY
> > To email, remove the double zeroes after @
>
> Dirt is not insulation, my freeze depth is 3.5ft, dirt transfers cold.- Hi=
de quoted text -
>
> - Show quoted text -
Here's my take on answering the question. The value of insulating
something depends on the temp difference between the two areas. As
Ransley pointed out, depending on climate, the outside soil temp can
be quite low for at least a good part of an outside wall. On the
other hand, for a condo basement wall that is shared with another unit
on the other side, the potential temp difference will be less. A
finished basement that is heated on the other side, would have about
zero temp differential. An unheated one, maybe 15 degrees or so.
Even if it's a shared foundation wall with no basement on the other
side, the area towards the middle of that wall is going to have a lot
less temp differential than an outside wall when it's 10 degrees out.
So, it's clearly less important to insulate than the other walls.
However, if it were me, I'd probably just go ahead and do it anyway,
as over the years, even a small difference can add up.
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