lm tiles

Any advice on tiling onto a sand cement screed laid over underfloor heating pipes . I would imagine the screed will be pretty weak not like a concrete floor . Ceramic tiles ..

Dave

If the screed is laid right then it won't be weak....use flexi products to tile with...Also a product like ditra mat is ideal for this type of installation.........

lm tiles

Thanks for getting back as quick . would you advise sbr bonding first

Dave

Most definitely...........

lm tiles

will do m8 .its great to have a back up like this site . does wonders for your confidence .

enduro

A plumber mate of mine when they have laid this type of heating turn the heating on for a couple of days as hot as it will go then let the floor go cold before i tile, dont know if this helps to stop to much expansion.

pjc

this may help Pete

http://www.pci-uk.com/PCIUK/En/tilin...oorheating.htm

GazTech

[quote=pjc;39276]this may help Pete

[URL="http://www.tilersforums.co.uk/redirector.php?url=http%3A%2F%2Fwww.pci-uk.com%2FPCIUK%2FEn%2Ftilingadvice%2Fhowtoguides%2Ftilingontounderfloorheating.htm"]http://www.pci-uk.com/PCIUK/En/tilingadvice/howtoguides/tilingontounderfloorheating.htm[/URL][/quote]
nice one pj...the bit about heating gradually was spot on !:hurray:

[B]"[I][COLOR=darkgreen]The bitterness of poor quality remains long after the sweetness of low price is forgotten[/COLOR][/I]"[/B]

pjc

Had one turn the heating on to 30 deg while still tilling on limestone nice one

GazTech

[quote=pjc;39284]Had one turn the heating on to 30 deg while still tilling on limestone nice one
:furious3: :mad2:[/quote]Dear me ..how considerate...did you revert to mixing rapid by the cup full....lol

[B]"[I][COLOR=darkgreen]The bitterness of poor quality remains long after the sweetness of low price is forgotten[/COLOR][/I]"[/B]

pjc

one of those clever guys who know everything

Leatherface

Guys - to do the job properly - first the screed should be allowed to dry out naturally - dependant upon conditions. Once dry the underfloor heating should be switched on and gradually brought up to maximum operating temperature - . Leave on once max temp has been reached for a couple of days , then allow to cool down prior to tiling. The reason for switching the heating on first is to allow for any initial expansion and cracking of the screed due to the heat.
Once tiles have been fixed again leave heating off for a couple of weeks, then again heating should be switched on and gradually brought up to maximum temp again.
Sounds a drawn out process, but a safe one. This is what I always advise and have never had any tiles crack or lift.