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Underfloor heating, radiant tubes

Al Letellier_21
Al Letellier_21 Member Posts: 402
It depends.....is the space below heated? If not, at least R19 is recommended. Less is needed for heated space. Fiberglass batt insulation works fine. Check with the manufacturer of tubing as to whether or not you need an air gap under the tubing

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  • Howard_7
    Howard_7 Member Posts: 11
    Underfloor heating, radiant tubes

    I am installing radiant tubes, underfloor. Does any one know what kind of insulation I should use between the floor joists? There is room for R-38 (fiberglass). Do we use fiberglass, pink board, or reflective? Thanks! Howard
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