dullard
Elite Member
- May 21, 2001
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Basements have about 12742 kilometers of insulation as-is. Adding a few more centimeters of foam would not do much. I posted the calculations on this forum years ago, and the heat lost through the basement was negligible.I don't believe basement floors are even insulated even in modern construction though, and not sure how easy that would be to do, can you pour concrete over foam without it compressing? Though if basement is dug deep enough and the walls are insulated as part of the same envelope as the upstairs walls, then it would probably be pretty good.
