Uncoupling Mat yes or no - TilersForums.com

[MinionKevin]

Hi everyone
I have the following: Natural stone floor tiles to be laid on a dry anhydrite screed floor with underfloor heating in the kitchen. The tiles will be sealed. I will be using a flexible adhesive and grout having previously sealed the floor with say BAL prime APD.
Question is do I need to lay a uncoupling mat like for example BAL rapid mat prior to tiling.
I'm asking this as some info I've found says no but seems the majority says yes so that's why I'm asking the experts

Thanks in advance for any replies

 

[hmtiling]

Absolutely yes! There are loads of threads on here about anhydrite/alpha hemi-hydrite screeds. have a good read through for proper prep of these and use gypsum based adhesive under the decoupler

 

[hmtiling]

Did mayhew pump it as you're in Hampshire?

 

[Flintstone]

I would yes. Also use a propper adhesive such as tilemaster anhyfix

 

[MinionKevin]

Thank you everyone. As I thought a mat is needed. Taken the advice for the adhesive to bond the mat to the floor and no Mayhew didn't pump in the screed was a company called Partridge screeding. Did a good job