self levelling compound on top of Egger P5 Protect Board

[kaide]

Hi everyone,
Is there any such thing as a self levelling compound that can be directly laid on top of Egger P5 Protect Tongue and Groove Chipboard? My builders have done just that and then tiled on top of it. My tiled floor has failed.
The Egger people have been really helpful. They say that it is well known that melamine can be a difficult material to bond to. However, the Egger people have advised me to contact a manufacturer of levelling compounds to check whether they have a particular product they can suggest for a melamine surface. I've contacted one company but no luck so far.
From your experiences as tilers, have you ever come across a levelling compound that you can use on a melamine surface before?
Many thanks in advance.
Kaide:mad2:

 

[Mr Tiler]

to my limited knowledge slc over any chipboard surface is a no no.... but id wait for one of the pros to advise

 

[Martyn Leeds]

Builder?? Are we looking for a suitable SLC product to re-do the thing again?? or are we just double checking what they've used? or are we at the stage where we're ripping the failed floor up, and we're starting again?

 

[nybor62]

builders dont ya just love em , not
nothing suitable imho , rip up and start again sorry

 

[kaide]

Thanks Martin and Mr Tea Bag for your response.
Yes, I am double checking what my builders used. But I don't know what SLC they used. Brand new kitchen sitting on a failed floor! My builders have ripped the floor up and say it failed because I have a few spliced joists (they did not tell me about at the time) and that it is my fault. They want to charge me over £5000 to rectify the joists and lay a new tiled floor. No way!!! Hence, I am gathering information against them.
Since posting, I have had 3 positive individual SLC companies email me to say they have no products to recommend. Instead, they advise to put plywood or Hardibacker board over the Egger P5 boards.
Thanks again,
ali

 

[Martyn Leeds]

I would assume he's used whatever SLC he usually uses, flexible or non-flexible. Not that it really matters. What product does he say he's used?

 

[andyb1]

Doesn't matter what SLC they used, wrong option to start with.

 

[Martyn Leeds]

Is this the same Porcelain floor, or the 2nd effort that has failed again?

 

[kaide]

Hi Martyn,
We haven't asked the project manager of the building firm yet what SLC he's builder used. Knowing our luck, it probably was non-flexible!
Ali

 

[kaide]

Hi Martyn,,
This is the same porcelain floor that I posted back in April. We have not had it rectified yet. We are victims of cowboy builders. We are gathering all the necessary information to back our case.
ali

 

[Martino]

The floor was proborbly very deflective/bouncy thats why they failed??

 

[IHB]

You mention melamine. Is this chipboard melamine faced?

 

[The Legend; Phil Hobson RIP]

Thanks Martin and Mr Tea Bag for your response.
Yes, I am double checking what my builders used. But I don't know what SLC they used. Brand new kitchen sitting on a failed floor! My builders have ripped the floor up and say it failed because I have a few spliced joists (they did not tell me about at the time) and that it is my fault. They want to charge me over £5000 to rectify the joists and lay a new tiled floor. No way!!! Hence, I am gathering information against them.
Since posting, I have had 3 positive individual SLC companies email me to say they have no products to recommend. Instead, they advise to put plywood or Hardibacker board over the Egger P5 boards.
Thanks again,
ali

Sorry but chipboard in any form will never be a suitable surface to tile on.

 

[lindaree]

Sorry for your troubles but as others have said - your floor is a no go regardless of product. The least you should have had is a decoupling mat(sometimes known as an anti crack mat) and most probably either ply or hardi board as well as the mat. If you can find out which adhesive they used you can go straight to the manufacturers who (in my experience) will come to see you foc and spec the floor. If as it sounds like, the builder has made a hash of the install, the manufacturers rep will provide a report saying this is how their product should have been used, so although its unlikely this report will lay the blame with the builder its more evidence to help you sort out them out by being able to show the install was wrong from the start.

 

[DHTiling]

Yet again a builder see's tiling as a anyone can do it trade and it has come back to bite him.. BIG SYLE!!...


By rights the builder should have done a deflection test and established whether the substrate was capable of taking the weight of the tiles and also providing a suitable background to tile too , as chipboard even with the waterproof coating is not suitable.

 

[Mr Tiler]

I think he/she says he slc the floor dave

 

[DHTiling]

I think she says he slc the floor dave

ye i know.. slc does not make it suitable to tile too.. and will not sort any deflection either.

 

[Martyn Leeds]

Can of worms though. Lot more information on the original thread, I'd post a link, but I'm off to bed instead!!

 

[IHB]

Egger p5 looks like it has a melamine face Products.

I'd imagine that the SLC hasn't bonded with the melamine and has broken up.

 

[Ajax123]

Tremco unismooth would probably stick to melamine... Wouldn't think they would recommend it though...