Indian sandstone with underfloor heating

mulls · 1 Jun 2010

Hi experts - I hope you can advise me with this.

I am laying indian sandstone inside our house (looks fantastic when glazed with a suitable lacquer). I also want to install electric underfloor heating in the same room.

I was at the sandstone supplier today and he said you don't need any flexible adhesive for the job - just a dry sand/cement mixture. I'm not sure about this as it concerns me that when the heating comes on, the tiles will lift.

Can anyone please advise the following:

- If sand/cement is not the correct approach, what is? Flexible tile adhesive perhaps?
- If sand/cement is OK, what ratio should I use?
- I am assuming sharp sand. Is this OK?
- Should it be a dry mix or wet?
- What do I use as grout?
- Can anyone advise a suitable lacquer I could use?
- Any other concerns?

Thanks very much.

Mulls.

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Indian sandstone with underfloor heating

mulls

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