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Underslab insulation for hydronic system in MN-Recomendations

Roger_10
Roger_10 Member Posts: 1
in THE MAIN WALL

Comments

  • kpc_44
    kpc_44 Member Posts: 29
    2 \" of Extruded

    polystyrene... the blue Dow board. don't fall for the bubble foil or thin insulations joke that claim eqivalent R-value.
    PS... make sure you get your perimeter insulated too.
  • Unknown
    Unknown
    I still use,,,

    Insultarp but explain the differences to my customer beforehand and give them the choice. I like it because it is a quicker, easier install and can be walked on without damaging it.
  • mark ransley
    mark ransley Member Posts: 155


    R 7.2 per inch Polyisocyanurate foamboard with foil face. Its the highest R value with radiant barrier, use 2" The blue and pink board are R5"
  • Barry Fawcett
    Barry Fawcett Member Posts: 4
    labor savings plus insulation

    www.creatherm.com

    save tube install labor, a jar of aspirin, plus get R9 insulation.
  • kpc_44
    kpc_44 Member Posts: 29
    no radiant...

    barrier if the slab touches the insulation...

    http://www.healthyheating.com/Page 55/Page_55_o_bldg_sys.htm
    Not to mention if the poly iso gets wet you lose some of it R value... and ants love the taste of the stuff...
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