Insulation on all walls or just exterior walls?


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Old 07-19-14, 01:27 PM
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Insulation on all walls or just exterior walls?

I am in the process of finishing our basement and was wondering if we need to insulate all the way around, or just on the walls touching the outside (dirt).
We are in a 1930's twin, so one wall is shared with the neighbors, and stays a constant temp. Would it be necessary/a good idea to insulate this wall? The walls are parged, Drylocked, I am using the rigid foam boards and will be covering with green board.
Thanks!
 
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Old 07-19-14, 02:16 PM
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The only reason to insulate an interior wall is for sound deadening. Does any noise transfer thru the wall from the neighbors?
 
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Old 07-20-14, 10:09 AM
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I wouldn't insulate interior walls. That said, there might be reason to insulate the shared wall for sound but it would likely be a different process than what you're doing on the outside walls for temperature.
 
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Old 07-21-14, 03:51 AM
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No noise, it is a rock rubble wall and pretty thick. If it is not necessary to do all the walls, then I will only do the ones that touch the outside soil (which is where any temp change comes from). Thanks!
 
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Old 07-21-14, 04:25 AM
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before you get on w/the work & risk $ & labor, tell us more about the exterior walls,,, adding your location helps greatly - eg, philly row houses, parging, & drylock stuff do not a good combination make
 
 

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