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Insulating my cellar walls

in my basement the walls are framed and electric is all in when we purchased it. I am looking to finish it up. What type of insulation should I use on framed walls on concrete wall sides? The concrete is sealed with a paint I assume moisture lock--done before I purchased. I am trying to avoid using styrafoam since framing is already done and I want to do this my self save labor. Some things I read said bate insultion a bad idea because of mold? If sealed witrh moisture lock do I have to worry about that. If it wastn't framed I would have used styrafoam first then frame but what is my best bet? Thanks for your help

Timothy Miller
Re: Insulating my cellar walls

Howdy, is the framing tight against the foundation walls? is there a foam strip between the wood and the concrete floor? Any evidence of moisture? Mold is always a concern in basements. Insulation that does not readily grow it is a good start. No paper backed fiberglass! Fungus/ mold eats wood paper is wood. If you are going to use the room allot then once you have ruled out moisture entry consider having an 1" or 2 of closed cell insulation spray applied to the wall cavity it is $$ but very effective. Have you done a moisture test on the floor? Consider taping a 2 foot square of plastic to the slab and come back in 24 to 36 hours and see if moisture on the cement/ plastic if not then you have good options if moisture then maybe no finish the cellar.

Re: Insulating my cellar walls

Styrofoam panels are as easy as insulation gets so I don't understand your reluctance to go that way, but any time moisture might be an issue you need a closed cell foam of some kind for insulation. Anything that can absorb or hold moisture will find a way to do that in this scenario. You can place the panels between the studs or furring then fill gaps with minimal-expanding foam. You'll still have heat conductivity through the wood though.

Never expect a basement to be dry unless it was thoroughly waterproofed from the outside when the house was built. Always allow for a way to handle unwanted water ingression large and small because it is likely going to happen sooner or later in every basement.


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