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insulating underfloor for retrofit

Retro Member Posts: 13
I'd like to consider underfloor radiant for a retrofit but have some concerns. First, I have some doubts whether inspector will OK reduced crawlspace clearance due to new insulation.

Would it be practical to delete some or all underfloor insulation in favor of a conditioned crawlspace?

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  • meplumber
    meplumber Member Posts: 678
    The short answer is no.

    Most of the radiant floor systems require a minimum of R-13 under the floor to drive the heat up into the desired space.  Otherwise you will have ceiling radiant in the crawlspace.

    www.uponor.com has some great literature on installation methods.
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