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Insulating conventional foundation floor


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07-08-00, 07:09 PM   #1  
I have heard pros and cons regarding insulating the floor with fiberglass insulation in a conventional foundation. Any suggestions? I also heard that instead of insulating the floor, I should spray insulation on the block wall instead. Anyone know?? We are building now so need an answer asap. Thanks!

 
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07-12-00, 04:09 AM   #2  
You should check you insulation codes. Several years ago, the codes said to insulate all foundation walls, then they changed to insulate the floors. I always insulate between the floor joists with rolled insulation, paper on one side.

 
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07-22-00, 11:10 AM   #3  
Why not use 2x3s or 2x4s as floor joists and use 1 7/8" or 2" rigid foam between? This will give you between 10 and 14 R on the basement floor.

 
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