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ICF forms (Rastra blocks) & slab edge insulation

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DJFiler
DJFiler Member Posts: 1
in Radiant Heating
how suitable are Rastra Insulated concrete forms for slab edge insulation in a radiant floor job-  if the radiant slab is poured right up against the Rastra blocks without an additional thermal break, how serious is the slab edge heat loss into the Rastra blocks?   

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  • Mark Eatherton
    Mark Eatherton Member Posts: 5,875
    You'll be fine...

    Rastra block has decent R value. Most slabs get NO thermal break, and they work fine, although not the most efficient use of energy tho...



    ME
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