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jrstingray 12-02-2011 07:43 PM

Insulating exterior basement walls
I am renovating a basement coming up pretty soon and the basement has insulation that has been shot onto the exterior wall down below the frost line.
The insulation looks like it is glass fibre with a vapour barrier holding it up.

I am going to frame out the walls and run electrical and I was wondering if it is necessary to insulate the walls that I am installing or will this cause different problems.

I am new to this type of insulating and want to know if there is anything that I should be aware of.

nealtw 12-03-2011 02:07 PM

I have not seen what you have described but the vapour barrier should be inside your new insulation. I guess the question should be to remove the old stuff or not.

joecaption 12-05-2011 07:32 AM

I think what you looking at outside is waterproofing not insulation.
Insulation out side most likly would have been done with Blue foam, not a thin fiberglass mat.
So yes you need insulation inside the basement wall.
No pic I'm just guessing here.

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