Floor Build Up with UFH - Tile Advice

[samwynn]

I'm thinking of including an electric heating mat under the floor tiles in the upstairs WC. Could you provide advice on thickness and build up?

Currently there are floor board fixed to joists. I was going to fix down the joists, lay over a cement board, lay an UFH mat and then tile over the top of that with flexible adhesive.

Is this the correct build up and any thoughts on the thickness of cement board that should be used?

 

[Dave]

6mm Hardibacker type board , lay ufh and then incapsulate in levelling compound before tiling.

 

[samwynn]

Thanks,

Is there a way to reduce the level build up so as not to create too much of a lip between the carpet landing and WC?

 

[eddcottee]

Put a door bar in between the two and that will take care of upto about 25mm of height difference and leave a clean edge both sides. Will you be any further out than that or not?

 

[Dave]

Thanks,

Is there a way to reduce the level build up so as not to create too much of a lip between the carpet landing and WC?

Put a shim under the carpet to reduce build up