tiling over wet ufh - TilersForums.com

[cowgomoo]

Merry Christmas everyone ! Just a quickie before we all break up, a customer of mine is installing wet ufh in his bathroom and has been advised to top this with 6mm play and tile onto that with flexi addy. I know this to be not best practice but what would be the best solution. Would it be best to use a thin layer of slc or a cement board or just tile straight onto the polystyrene in which the pipes lay. All help appreciated. Cow.

 

[Gazzer]

Is this the PolyPipe system ?

 

[cowgomoo]

Good Afternoon Sir, I don't know which system it is. I will find out shortly but would it make any difference anyhow ? Cow.

 

[Gazzer]

If you search on here for Polypipe you may get more answers.

 

[Gazzer]

Or http://www.tilersforums.com/tile-adhesive-grout-substrate-preparation/47255-polypipe-ufh.html

 

[beanz]

I've only used the Polypipe system, but that was under oak flooring, so not much help here.. Whatever system you're using, tiling straight onto the polystyrene sounds like a no no to me. I'm interested to hear what you come up with, because if it's the same system i used, i'd be stumped at how to make it solid enough to tile onto.

 

[cowgomoo]

Hi Beanz, will keep you up to date when I get there ! Merry Christmas

 

[Rich]

I walked away from a job with a local builder because he had the same thing put down in the kitchen and wanted me to tile over the 6mm ply. He said that they used to use a cement board but it was taken off of the market and the only thing that they can replace it with is ply.

I dont care what the company say, tiling onto 6mm ply is not good enough IMO, I could move the boards up and down by pushing on them with my thumb.

 

[Ajax123]

6mm ply will fail. Is there a screed over the heating if so why not tile direct to the screed. If there is not a screed how does the custmer intend to get any benefit from the heating system (e.g. reflector plates, biscuit mix etc etc)

 

[Rich]

If it was installed the same way as mine (I dont know if it was or not), there was no screed. Just pipes, poly foam stuff and then ply. I couldn't put together a worse floor to tile onto if I tried!