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AL K. Member Posts: 17
I'm going to be installing my first radiant floor, in my own home as a test bed( I'm a contractor, no real experience in this area though).

The original thought was to do staple-up( 3/4" ply, 1/2" cement board, 1/4" tile), proper heatloss calc's of course.

Anybody have any experience with THIN overpours? The plywood subfloor has to stay, the tile's been bought, and matching other existing floor surfaces is important( to my Princess!)

Maybe a 'Board or 'Trak system? How thick are these panels, and would there be enough support for the tiles?

Thanks, Al K.


  • delmas
    delmas Member Posts: 4

    One thing to keep in mind here is that your floor needs to be designed to handle the extra weight of an overpour. The fact that this only coming up after the floor is in made me think of this.
    I've never done Gypcrete or any other type of overpour. I'm sure there are others here who can give you more direction on this.
  • AL K.
    AL K. Member Posts: 17

    Thanks for the reply, Delmas. Is an overpour still more weight than cementboard, after (most of) the water has cured out?
    Al K.
  • Cosmo
    Cosmo Member Posts: 159
    Staple up...

    Using the new thicker heat teansfer plates you might be able to do from underneath depending on size of bathroom and btu's needed. If you can install on top many companies make 1/2inch thick panels that are routed out to fit 5/16 pex, I have used Wirsbo's Quik Trak. It works good, just a lot of planning ahead before you start cutting the panels to fit.

  • AL K.
    AL K. Member Posts: 17
    Quick Trak

    Thanks, Casmos. That 1/2" is the magic number, I'll check with my supplier on Monday.
    Al K.
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