Marble Floor

[Diggy]

UFH - Natural stone = decoupling mat , no brainer.

Diggy

 

[jimbo]

The floor is approx. 25m2. I have tiled concrete floors before with underfloor heating with no problem without a decoupling membrane,but only 15m2 max.My original question was if Bal Flexible Adhesive would be ok.

 

[DHTiling]

Yes the adhesive is suitable for a fully cured and commissioned screed.

 

[jimbo]

Thanks for that information.

 

[Concrete guy]

I always preferred Ardex S20W for marble, it releases it's moisture (or more importantly doesn't release it's moisture to avoid water staining) in a different manner more suitable for natural stone, particularly if it's a light marble.

Not particualrly cheap though but suitable for UFH.