600x900 limestone floor - TilersForums.com

[dchtilingnorthwest]

Hi all i am looking for some advice on the best adhesive to use on a floor which has a water fed underfloor heating system.
The total area is 150m but this is divided into 4 separate areas so is not one big area.

Customer has been advised to use a 2 part adhesive but I am wondering if this is absolutely necessary? Any advice much appreciated.

 

[Blunt Tool]

Is it a screed floor? As long as you use uncoupling mat a cement based flexible adhesive is fine.

 

[dchtilingnorthwest]

the system is laid into some kind of pre-moulded blocks and I was wondering whether these would therefore eliminate the matting? If not any advice on the cheapest place to buy the matting as i've just had a quote of £1500 for 150m.

Thanks you

 

[Blunt Tool]

the system is laid into some kind of pre-moulded blocks and I was wondering whether these would therefore eliminate the matting? If not any advice on the cheapest place to buy the matting as i've just had a quote of £1500 for 150m.

Thanks you

After the pipe work was laid did they lay a screed over them?

 

[dchtilingnorthwest]

No, there is no screed.....

 

[Blunt Tool]

No matter what you will need uncoupling mat, too much movement in stone with heat, I buy 30 metre rolls from my local CTD for £200 is there one near you?

 

[dchtilingnorthwest]

yes I use CTD also....thank you. Would you say screeding prior to matting is absolutely necessary? Usual scenario where the money is running out towards the end of the job but I just want to make sure its right.

 

[Blunt Tool]

Never seen this pre formed block thing so if you think they are stable enough prime and cement based flexi adhesive matting down, if not slc then matting

 

[dchtilingnorthwest]

Its this here. polypipe overlay and it says can be tiled straight onto....

 

[Blunt Tool]

If it says that then probably means ceramic or porcelain so since you are laying stone then straight on with matting