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Posted by Edwin Pawlowski on May 8, 2008, 10:20 pm
> The outside of the basement is already insulated, with dirt.
Do some research and see how much heat is being lost to that dirt. It is
not a very good "insulator" at all.
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Posted by BobK207 on May 9, 2008, 12:09 am
> > The outside of the basement is already insulated, with dirt.
>
> Do some research and see how much heat is being lost to that dirt. =A0It i=
s
> not a very good "insulator" at all.
Per Ransley & Ed..... dirt isn't much of an insulator (but better
than concrete)
R values per inch
"dirt" ~.25
concrete ~.08
wood ~1.2 (depending on type)
In areas where the frost depth is substantial you'll have dirt temps
up against your foundation wall in the 32F to 0F (or lower).
Heated spaces will loose lots of heat through soil contact. That's one
reason why above ground well insulated spas / hot tubs are so much
cheaper to heat than in-ground energy hogs.
Without decent insualtion on the basement walls you can lose a lot of
energy heating the soil mass around the basement. How much depends on
the local soil temps during the heating season.
cheers
Bob
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Posted by ransley on May 8, 2008, 2:07 pm
> 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.
I thought you meant the outside and inside of one exterior wall, I
wouldnt insulate an interior adjoining wall, just all walls that are
exterior to weather. 1' foamboard depending on type is only R4-R7,
thats not much insulation. in Zone 5, R- 40 is optimal for walls, but
few can do it or afford it unless it is new construction.
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Posted by Joe on May 8, 2008, 2:38 pm
> 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.
What did your building inspection department tell you when you asked ?
Better call them if you haven't, and then you'll have the right
answers if your HOA gets snitty about the project. Good luck.
Joe
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Posted by Edwin Pawlowski on May 8, 2008, 10:19 pm
What did your building inspection department tell you when you asked ?
Better call them if you haven't, and then you'll have the right
answers if your HOA gets snitty about the project. Good luck.
Joe
Why do you have to call the building inspector? None of their business if
you frame and insulate your walls.
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