Best Adhesive To Fix Porcelain Tile To Ditra Over Plywood With Underfloor Heating

[Kyle Knowles]

I've bin reading rather a lot on this subject as it will be the first time I've used ditra over ply with heating and I'd like some information fron the fellas who do this all the time
Much appreciated

 

[J Sid]

Weber SPF for me, ctd have bags 25kg for the price of 20kg, silly not too.

 

[LM]

You shouldn't be using ufh over ply, Fire Hazzard

 

[Kyle Knowles]

It's a wet pipe system under the ply sorry I should of made that point

 

[J Sid]

You shouldn't be using ufh over ply, Fire Hazzard

wet under ply

 

[LM]

Oh ok, no probs

 

[Kyle Knowles]

I try not to use rapid set unless I really have to I like standard set it's easier to keep ur tools and equipment clean or am I being a lunatic haha

 

[LM]

If time isn't an issue then standard set is the way to go

 

[Spare Tool]

TM standard setaflex, don't like the idea of ply over ufh though..

 

[LM]

TM standard setaflex, don't like the idea of ply over ufh though..

Totally agree, movement would be more than alternative substrates, no need to risk it now with superior options

 

[Spare Tool]

Talked a customer out of Polypipes spec on same in January, went straight down on pipes and insert boards instead as I couldn't get my head round tiling on the ply..

 

[One Day]

ardex af200 onto ply. Couldn't be easier!

 

[Kyle Knowles]

Totally agree, movement would be more than alternative substrates, no need to risk it now with superior options

What would be ur preferred method of goin over polypipe ?

 

[Sean Kelly]

ardex af200 onto ply. Couldn't be easier!

As Impish said......Ardex AF200 to stick down the Ditra. You can then start tiling straight away.

If you use rapid (remember you must use rapid onto ply) then you have to wait for the adhesive to harden before you walk or tile onto the Ditra.

If you use slow set to tile porcelain tiles onto Ditra then give it a few more hours drying time.........this especially applies in the Winter time.

 

[Kyle Knowles]

I'm using rapid to bond the ditra it's gonna be laid Wednesday and possibly Thursday then start tiling Saturday so it's got plenty of time to cure

 

[LM]

What would be ur preferred method of goin over polypipe ?

HardieFloor for under floor heating
For clients who desire the comfort of under floor heating, HardieFloor® is the perfect solution. Unlike wood, it won’t swell, shrink, expand or buckle due to temperature changes and its thermal conductance properties mean that the heating system will react faster and can help conduct more heat into the room.

 

[Kyle Knowles]

HardieFloor for under floor heating
For clients who desire the comfort of under floor heating, HardieFloor® is the perfect solution. Unlike wood, it won’t swell, shrink, expand or buckle due to temperature changes and its thermal conductance properties mean that the heating system will react faster and can help conduct more heat into the room.

Are u talking the real thick board with the lip that lock together?

 

[LM]

Yes its 27mm
Structural Fibre Cement Interior Flooring - HardieFloor

 

[Spare Tool]

As Impish said......Ardex AF200 to stick down the Ditra. You can then start tiling straight away.

If you use rapid (remember you must use rapid onto ply) then you have to wait for the adhesive to harden before you walk or tile onto the Ditra.

If you use slow set to tile porcelain tiles onto Ditra then give it a few more hours drying time.........this especially applies in the Winter time.

Why do you have to use rapid only on ply, or wait for adhesive to dry before tiling?

 

[J Sid]

Why do you have to use rapid only on ply, or wait for adhesive to dry before tiling?

if it's not dry when you start to tile and you need to lift a tile you put the mat up as well

 

[Spare Tool]

if it's not dry when you start to tile and you need to lift a tile you put the mat up as well

Oh ok so that's only reason then?

 

[J Sid]

Oh ok so that's only reason then?

it is for me

 

[ExplodingPudding]

It's just screaming at me that this might not end the way intended.... I would use the most flexible thing you could get your hands on. No personal experience with the technical info on piped heating under ply but your definitely going to need something good. I would say BAL Single Part Fastflex (12.5k gives 5m2) or something of similar standards. Out of curiosity, how comes they aren't having Hardiefloor or Hardiebacker on the floor? Also, again out of curiosity, is the ditra going to be enough to counteract the flex of the plywood when heated?

 

[Kyle Knowles]

I've sent the builder the info for hardi floor for future jobs, I've past him all the relevant information as I've bin in contact with schluter and it will be goin in writing on my invoice that this method don't meet the guidelines set by schluter but I'm confident there won't be any problems he's a good builder with 3 decades behind him

 

[Old Mod]

I've sent the builder the info for hardi floor for future jobs, I've past him all the relevant information as I've bin in contact with schluter and it will be goin in writing on my invoice that this method don't meet the guidelines set by schluter but I'm confident there won't be any problems he's a good builder with 3 decades behind him

Ahhhhhh bless........ I remember that!.........hope! Haha

 

[Kyle Knowles]

The builder said he's a religious man and he's had a word with the big man up top and he said its gonna be just fine lol

 

[hmtiling]

The builder said he's a religious man and he's had a word with the big man up top and he said its gonna be just fine lol

All sorted then

 

[J Sid]

Why do you have to use rapid only on ply, or wait for adhesive to dry before tiling?

been to a schluter demo this afternoon at local CTD and asked a few questions think they were getting p*** *** with all the questions anyway stick Ditra to any substrate with a C2 rated adhesive and no need to be rapid onto any surface and doesn't need to be set before tiling starts.
when I asked why TM say use ultimate S2 they laughed and said so they make more money, it words to that effect, all thats needed is it to C2 rated as a minimum.

 

[Spare Tool]

been to a schluter demo this afternoon at local CTD and asked a few questions think they were getting p*** *** with all the questions anyway stick Ditra to any substrate with a C2 rated adhesive and no need to be rapid onto any surface and doesn't need to be set before tiling starts.
when I asked why TM say use ultimate S2 they laughed and said so they make more money, it words to that effect, all thats needed is it to C2 rated as a minimum.

Mate you've taken what I said TM had said way out of context..
They only said Ultimate S2 perfect for sticking ditra/dural to a new/green screed, which was the question I asked. I'd already bought the gear anyway but was just double checking with them

 

[J Sid]

Mate you've taken what I said TM had said way out of context..
They only said Ultimate S2 perfect for sticking ditra/dural to a new/green screed, which was the question I asked. I'd already bought the gear anyway but was just double checking with them

sorry for miss understanding, but same answer, Ditra onto green screed only needs a basic C2 adhesive.