Tiling on Weyroc Protect

[alan42]

Thanks to all. Certainly gives me an idea what the general consensus is. By the way I contacted BAL as their fast-flex 2 part was since recommended. They said it is suitable for tiling directly on Weyroc/chipboard and with UFH. So it's down to that vs Hardie backer from a cost and extra work aspect.

Alan

 

[doug boardley]

it's your call alan, but tilers with a lot of years experience have said not to do it...

 

[kitl]

Hi I am new here, this thread is very relevant as my builder has just put down weyroc insisting it is fine to tile on and the first tiler I approached wants it ripped up!
Is Hardibacker suitable for UFH? I have pipes in screed between joists.

Thanks for any help.
Kit

 

[Time's Ran Out]

:welcome:Kit - Your floor sounds as though its a 'floating' floor and has its own set of problems/drawbacks!
You may find in this case that your tiler is correct, but there are other issues with reference to movement and stability and deflection of the surface which need to be checked.
A consensus on the forum would undoutably ascertain the unsuitability of this type of substrate for tiling, however Adhesive manufacturers do make products for 'floating' floors but the ultimate decision would rest in the contractor (tiler) accepting responsibility for future movement/or not!

Advice : post another thread with your particular situation and assess the replies.

 

[kitl]

Thanks John
It is a suspended rather than floating floor and the original boarding was removed so that the ufh pipes and screed(pug) could be installed. Most is now ready for re coverin but some has been freshly Weyrocced. The rest is still screed and joists.
Do I have to remove the weyroc and replace with ply? Is 12mm ply ok?
I am concerned about the heat transfer.

Thanks in advance

Kit

 

[Richard Edwards]

Hello Kitl and welcome.

A quick question - is the floor on the ground or 1st / 2nd floor etc and are the joists timber or concrete beams. I assume the UFH is water type. As John has sai we need a bit more info / picture or two to move this forward.

Deflection and movement of the substrate is always a major issue. If this is the case then an Uncoupling membrane on top of any sheet material that you use might be answer.

Please post your additional info and the members on here will help.

 

[kitl]

Thanks Richard
The floor is timber joist ground floor with a void underneath. The ufh is water.

 

[grumpygrouter]

Hi I am new here, this thread is very relevant as my builder has just put down weyroc insisting it is fine to tile on and the first tiler I approached wants it ripped up!
Is Hardibacker suitable for UFH? I have pipes in screed between joists.

Thanks for any help.
Kit

Next time your builder tries to tell you what is fine to tile onto, casually mention that your glazier recommends holding his brickwork together with putty! After all, it holds his glass in place ok.................:smilewinkgrin::smilewinkgrin:

 

[lent]

Have just moved into a house where the porcelain flooring has failed...tiles are blown. Substrate appears to be Weyroc Protect.No idea which adhesive was used. kitchen has been flooded though exposed Weyroc,under the units, does not seem to have been adversely affected. Nevertheless its made me a little nervous about this stuff,as I am about to quote for relaying these tiles and by coincidence the same board is on another job i am also about to quote for.
I phoned the company www.egger.co.uk who reccomended bal flex and fast flex,Ardexflex 7001,and Biscem vitreflex (Bostic). I just like 'ALAN 42' am calling adhesive companies for confirmation

 

[Richard Edwards]

Have just moved into a house where the porcelain flooring has failed...tiles are blown. Substrate appears to be Weyroc Protect.No idea which adhesive was used. kitchen has been flooded though exposed Weyroc,under the units, does not seem to have been adversely affected. Nevertheless its made me a little nervous about this stuff,as I am about to quote for relaying these tiles and by coincidence the same board is on another job i am also about to quote for.
I phoned the company www.egger.co.uk who reccomended bal flex and fast flex,Ardexflex 7001,and Biscem vitreflex (Bostic). I just like 'ALAN 42' am calling adhesive companies for confirmation

Hi Lent

Well I guess you have read through this post start to finish and basically nothing much has changed.

If you want to keep the Weyroc - not sure why you would want to, however,,,, Replace any boards that have swollen or been water damaged. Ensure entire floor and supporting structure is sound, stable and well screwed down etc.

Then if you can, overlay with a suitable board, hardibacker 6mm , lux 6mm or similar cementous board - this will need to be layed with flexible ady and / or screwed depending on the board selection.

If you cannot accept the increase in height [kitchen units for example] Then there is only one product I can put my name and recommendation to - [only because I have never used the others - not to say they aren't suitable, they might be] BAL FASTFLEX.

Its very expensive, works out at about £45 GBP for 2-2.5m2 is not easy to use and you need to work very clean and tidy, especially the grout joints as the cured product dries to a charcoal colour and sticks to literally everything it touches. But we use it a lot and we price timber floors with it and in 8 years of using it I have never had a failure. But I repeat - the floor must have no noticeable deflection under normal operation loading. [Three fat ladies jumping up and down on 1 m2 is about right ]

Hope this helps