insulation board under slate floor to warm it up

Discussion in 'Remodel Forum & Blog' started by vtplumb, Apr 25, 2013.

  1. vtplumb

    vtplumb New Member

    Messages:
    11
    Location:
    Vermont
    Hi, I know about the Wedi and kerdi board but was looking for a lower cost alternative to creating a thermal break between a concrete slab an a slate floor I have a total of about 2 inchs to play with 1/2" of that would be the slate and morter.

    Can you use XPS or poly iso with Backer board or ply and backer board or ply only? may be alternate 2 pcs of 1/2" ply on top of xps or polyiso (screw down)?

    Anny help would be appreciated, thanks!
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