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Discuss Tiling caberboard floor in the Tiling Forum | Tile Advice area at TilersForums.com

acaciaguy

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I have a job coming up to tile on caberboard. 10mm porc. Floor is rock solid. Rather than overboard. I’m thinking decoupling mat. Any thoughts ?
 

Tile Fix Direct

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While Caberboard is moisture resistant fixing a de-coupling layer with adhesive would lock moisture under sheet and may encourage board to take in some moisture and swell? Using an Ardex or similar high spec fast set adhesive that locks moisture into the adhesive might be better, or even BAL Flexbone2easy that does not require adhesive.
 

jcrtiling

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I would want to mechanically fix do to nature of the caber board protective covering
 

LEE MAC

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Screw the Caberboard to the joists and use Ditra stuck with acrylic vinyl adhesive such as Ardex AF200 etc.
 

Boggs

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This was the last floor I took up with Ditra on Caber P5.

4AFD9E31-E0D1-48C5-9596-36903BC864E2.jpeg

I wouldn’t do it, 6mm Hardie every time.
 
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I’d take it up and pop 22mm No More Ply down. Then your Ditra if you like. I’ve never been a fan of chipboard. It’s always close to changing shape when water is nearby. Or 18mm ply then thin no more ply or Hardiebacker or Aquapanel.
 
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Cement boards do not add to the structural integrity of a substrate, they are just an inert tileable substrate that is unaffected by moisture ingress,
and should not be used to strengthen a floor.
That’s according to manufacturers guidelines.
 

acaciaguy

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  • Thread Starter Thread Starter
  • #11
Thank you for the advice guys. It’s in a small kitchen. Not a wet area. Floor Is 18mm onto timber frame on a concrete slab. Boards are screwed to frame and floor is rock solid. No movement at all.
 
Last edited:

Localtiler

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Cement boards do not add to the structural integrity of a substrate, they are just an inert tileable substrate that is unaffected by moisture ingress,
and should not be used to strengthen a floor.
That’s according to manufacturers guidelines.
That's true for most although Tilemaster claim otherwise with there 6mm cement board.
 

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