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  1. #1
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    Question for engineers and other smarts.

    How much r-value (benefit) can I add to my basement by putting 3" Styrofoam around the top (above ground level) portion of my basement? I have a pool table and don't want to give up the wall space around it. I have eight foot walls and can get free sheets which are 3"X4'X8' (or 12'). Any suggestions considered and appreciated.



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    Re: Question for engineers and other smarts.

    Quote Originally Posted by cychhosis View Post
    How much r-value (benefit) can I add to my basement by putting 3" Styrofoam around the top (above ground level) portion of my basement? I have a pool table and don't want to give up the wall space around it. I have eight foot walls and can get free sheets which are 3"X4'X8' (or 12'). Any suggestions considered and appreciated.
    I just talked to a guy that installed energy blanket type insulation- you know the tin foil looking thin stuff, and he was saying that it gave almost R15, and it sounded pretty cheap. Maybe look into that if space is an issue.



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    Re: Question for engineers and other smarts.

    You could go on the outside of the wall if you wish.



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    Re: Question for engineers and other smarts.

    Assuming the 3" styrofoam is an expanded polystyrene type insulation (blue board) you would get R-4 per inch or a total of R-12. If its an extruded polystyrene you would get R-5 per inch for a total of R-15. If you are getting it for free thats hard to beat.



  5. #5
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    Re: Question for engineers and other smarts.

    Kinda tough, part of it is under the deck, under the garage or porch. The part I can get to is flagstone foundation. I know it would be benifical...but labor intensive. Too old to do it myself and too cheap to hire.



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    Re: Question for engineers and other smarts.

    Dunno, but my parents did it to their floor when they finished their basement. You would never know there's a concrete floor underneath, even when it's -30 F outside...


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