Hi all,

Which is the best Tile adhesive to get?? i've have a concrete floor with a 6mm ply base which ive used evo to stick it down with. I've got warm-up underfloor cable to go onto this and was wondering which is the best tile adhesive or grout to buy??

thats all

Why put a 6mm ply on a concrete/screed floor

You are at a stage where you can really improve your warmup time. Speak with Aaron at U-heat and get the ply up and lay insulation board instead.
Then use a SLC suiteble for UFH over the mat or wire and use a flexible addy your tile shop recommends for the application.

To stop the loss of heat from the underfloor heating and the 6mm insualtion boards i had was rubbish

Originally Posted by davy_G

You are at a stage where you can really improve your warmup time. Speak with Aaron at U-heat and get the ply up and lay insulation board instead.
Then use a SLC suiteble for UFH over the mat or wire and use a flexible addy your tile shop recommends for the application.

i cannot take the ply up now its too late everything is fixed onto it and i had underfloor boards but i wasn't happy with the strength of them I only have 6m to play with.

The ply could cause you problems later on, the cold from the floor and heat may cause it to move and tile failure. Check the sponser UHeat he do's insulation boards at a very good price

If it was me id kango them up and get cement reinforced 6mm insulation boards.

Its your call but it will make a big difference.

Underfloor Heating | Floor Insulation | Uheat

Def asking for trouble with 6mm ply!!!!

Originally Posted by whitebeam

The ply could cause you problems later on, the cold from the floor and heat may cause it to move and tile failure. Check the sponser UHeat he do's insulation boards at a very good price

the floor temp shouldn't change that much it has 100mm kingspan under-it. so its already insualted

How much screed thickness to you have on the kingspan

Originally Posted by Hayden Goy

the floor temp shouldn't change that much it has 100mm kingspan under-it. so its already insualted

You have to heat the screed before the kingspan has any effect. ££££3

You will be applying heat directlty from the heat mat to 6mm ply! firstly this restricts the amount of power you can have in you heating system and secondly, ply is thermally unstable and will expand and contract a lot more than cement based thermal insulating boards, resulting in failure of your tiling surface!

Originally Posted by grumpygrouter

You will be applying heat directlty from the heat mat to 6mm ply! firstly this restricts the amount of power you can have in you heating system and secondly, ply is thermally unstable and will expand and contract a lot more than cement based thermal insulating boards, resulting in failure of your tiling surface!

But the floor is to be primed and 5-6 tiles have said this is ok?

Originally Posted by grumpygrouter

You will be applying heat directlty from the heat mat to 6mm ply! firstly this restricts the amount of power you can have in you heating system and secondly, ply is thermally unstable and will expand and contract a lot more than cement based thermal insulating boards, resulting in failure of your tiling surface!

As per Grumpy.

6mm ply will not offer much in the way of strengthening or insulation so seems a very strange choice.
What wattage mat / wire have you laid? You should not apply anything over 100 watts onto ply (fire hazard) which will not provide a massive amount of heat.

Take everyones advice and do the job properly mate.

Good luck.

Originally Posted by Hayden Goy

But the floor is to be primed and 5-6 tiles have said this is ok?

Not sure what you think priming will do but if you are happy with the advice of your 5 or 6 tilers then take it. I personally would not tile your floor in the way it has been prepared...you would be knocking on my door in a very short space of time asking me to repair the damage that will be caused by it.

Good luck, which ever way you chose to go. I will be delighted for you if it turns out ok with the prep the way it is.

This is what happens when you use ply and underfloor heating. Take the good advice already given and you will have a proper job.
Check out my other thread on here....'Another one for the Rogues Gallery'
Another one for Rogues Gallery

Originally Posted by grumpygrouter

Not sure what you think priming will do but if you are happy with the advice of your 5 or 6 tilers then take it. I personally would not tile your floor in the way it has been prepared...you would be knocking on my door in a very short space of time asking me to repair the damage that will be caused by it.

Good luck, which ever way you chose to go. I will be delighted for you if it turns out ok with the prep the way it is.

is there anything i can put on top thats thin? theres no way of getting the boards up now

Originally Posted by Captain Slow

As per Grumpy.

6mm ply will not offer much in the way of strengthening or insulation so seems a very strange choice.
What wattage mat / wire have you laid? You should not apply anything over 100 watts onto ply (fire hazard) which will not provide a massive amount of heat.

Take everyones advice and do the job properly mate.

Good luck.

hi its a dws 800 wire warm-up. its not laid yet

HG, you have had the advice of 5-6 tilers on here and we would all lift the ply.
No such word as cant...just wont. Get yer kango out, ditch the ply, lay insulation and make a job of it for yourself and the customer.

I know your not liking what we say but you can still sort it out, better than a call back in 6 months to rip it all up!

Originally Posted by Hayden Goy

is there anything i can put on top thats thin? theres no way of getting the boards up now

What is sitting on top of the boards now?

Originally Posted by Hayden Goy

Hi all,

Which is the best Tile adhesive to get?? i've have a concrete floor with a 6mm ply base which ive used evo to stick it down with. I've got warm-up underfloor cable to go onto this and was wondering which is the best tile adhesive or grout to buy??

thats all

Hello and welcome....

6mm ply isn't really suitable for tiling to...it is moisture un-stable and can swell even from the moisture in your adhesive...
But i am also concerned with the way it is stuck down...you would normally screw and plug it and if that glue breaks down then nothing is holding it...and then you are adding a heating element to it, can the glue withstand thermal expansion and contraction..?

You only want to do this job once, so think carefully before you go ahead on that ply...

Originally Posted by Dave

Hello and welcome....

6mm ply isn't really suitable for tiling to...it is moisture un-stable and can swell even from the moisture in your adhesive...
But i am also concerned with the way it is stuck down...you would normally screw and plug it and if that glue breaks down then nothing is holding it...and then you are adding a heating element to it, can the glue withstand thermal expansion and contraction..?

You only want to do this job once, so think carefully before you go ahead on that ply...

hi chap,

its well stuck down with strong evo adhesive which is like a rubber and is recommend to be used with underfloor heating/tiles and will not come up i'm really sure of that. I'm not a tiler only a diy and i purchased some underfloor heating boards but with the kitchen units having to sit on them i felt that 6mm boards wouldn't take the weight and get damaged. My electrician and tiler said to use 6mm ply. I also are very limited to height and have only 6mm to play with so thats why i got these boards/ply.Is there anything i can put on the top thats cheap and going to do the job?

Dave tell him please, before this turns into a disaster for all concerned!

Originally Posted by grumpygrouter

What is sitting on top of the boards now?

nothing chap only the fitted kitchen

Originally Posted by Hayden Goy

hi chap,
Is there anything i can put on the top thats cheap and going to do the job?

Lino

Save the money on doing it again

Originally Posted by Dave

Hello and welcome....

6mm ply isn't really suitable for tiling to...it is moisture un-stable and can swell even from the moisture in your adhesive...
But i am also concerned with the way it is stuck down...you would normally screw and plug it and if that glue breaks down then nothing is holding it...and then you are adding a heating element to it, can the glue withstand thermal expansion and contraction..?

You only want to do this job once, so think carefully before you go ahead on that ply...

There's just no point helping some people...
Get a written guarantee from your tiler and keep your fingers crossed that you won't ever need it!

Stay lucky

Originally Posted by davy_G

Dave tell him please, before this turns into a disaster for all concerned!

I really thank you all for your comments I will do the job correct but at the same time am limited by budget and i'l not able to get he floor up now it would cost me a bloody fortune. Again if theres anything i can put on the top of the boards that would be great

Originally Posted by Captain Slow

There's just no point helping some people...
Get a written guarantee from your tiler and keep your fingers crossed that you won't ever need it!

Stay lucky

nothing to do with not helping people its all about getting the right answers to the right questions.

For what good the ply will do for insulation with the ufh then i would just rip it up and tile onto the floor it's self...

Honestly we are not giving you advice to cause you grief, we are here to make sure you have a long lasting installation....Your tiler needs educating as well i think...

Do yourself a big favour and remove the ply...and just tile the floor ...you will probs need to mechanicaly remove the glue but you want the job done right...

The choice is yours really and we wish you good luck....

Originally Posted by davy_G

HG, you have had the advice of 5-6 tilers on here and we would all lift the ply.
No such word as cant...just wont. Get yer kango out, ditch the ply, lay insulation and make a job of it for yourself and the customer.

I know your not liking what we say but you can still sort it out, better than a call back in 6 months to rip it all up!

whats the thinest you can get??