tiles on chipboard

[Krillew]

I have particle board as flooring with 22mm oak planks on top, and I'm planning to lay tiles in front of the fireplace insert.

The tiles are 10mm, so I will need grout + some form of spacer material to make it 12mm.
The tiles are large pieces... 48x48cm so it needs to be stable, otherwise, they'll crack when someone jumps on them on purpose.

How should I proceed? Self-leveling compound might be too thin, will it hold?
The spacer material should probably be around 8-9mm.

What should I do?

HELP!!

 

[nino]

Glue a 6mm gypsum with Ardex S48 and set the tiles in X78
Not entirely according to the rulebook but it will likely hold

 

[Krillew]

You mean regular repair plaster

Yes, when I read Ardex's description, I think you're right...

 

[nino]

Yep repair gypsum

 

[jbr]

Minerit is available in several thicknesses. If you fully glue Minerit and screw it with cc200 or so, it will certainly become sufficiently rigid.

 

[SBH]

Minerit comes in several thicknesses. If you full-glue minerit and screw with cc200 or so, it will definitely be stiff enough.

have you found other than 12mm and 9mm?

 

[nino]

Regular Minerit should not have tiles placed on it as it moves quite a bit, Minerit VT works
Now they have probably changed the name

 

[jbr]

have you found any other than 12mm and 9mm?

Apparently, Minerit now has fewer thicknesses compared to several years ago. However, they also have a 6mm thick panel for facades called Windstopper.

Otherwise, one must look for other manufacturers of cement-based boards. They are very similar to Cembrit (Minerit) but have different thicknesses.

You can search a bit here:
http://byggkatalogen.byggtjanst.se/cementbaserade-och-cementbundna-skivor/61/sok?kategori=&page=1

For example:
http://byggkatalogen.byggtjanst.se/produkt/cementbaserade-och-cementbundna-skivor/dlh-fibercementskivor/39905

The difficult part is, as always, finding a distributor...

 

[jbr]

Regular Minerit should not be used for tiling as it moves quite a lot, Minerit VT works.
Now they have probably changed the name

Well, I actually discussed that quite extensively with the manufacturer a few years ago.
Just fully glued and screw cc200 was a method they recommended.

I actually laid 45x45 tiles 6-7 years ago on such a substrate and it turned out very well.

But as mentioned, it is the full adhesive against the chipboard combined with screws that creates the rigidity.

 

[nino]

Ardex S48 should not be screwed; if a screw is used because the substrate is uneven, it should be removed after curing. From what I recall, regular Minerit contains chips, so it moves with humidity, making it unsuitable for tiling, although it may well hold... I have torn down older kitchens where tiles have been on masonite for 40-50 years without cracks or tiles coming off.

 

[jbr]

Well, but it depends a bit on what you're looking for...
The method with glue and screws aims to stiffen the substrate, not just to deaden the material and prevent movements due to variations in moisture and temperature.

In this particular case, I understood it as TS being worried that the substrate is not stiff enough, and based on that, I recommend fully glued and screwed cement-based board.
Just my two cents.

 

[Krillew]

I agree, I am a bit worried that it won't be stiff enough.. Now there's another problem I forgot to mention... There's water heating under the chipboard and the area where I am supposed to lay the tiles has worn-off markings of where the pipes are. I can get a few screws in but not around the edges.. Towards the front side I can place a row in the middle but not along the side where the stove is.. I will screw as much as I dare.. I have tried with ordinary minerit at some point before and happened to leave it out in a rain shower.. It became quite soft after that.

Is this the board you mean?http://www.beijerbygg.se/store/privat/byggmaterial/byggskivor/cementbaserade-skivor/cembrit-ws-900x2700

Humant pris...

 

[nino]

Glue a 6mm repair gypsum with S48 and lay the tiles, skip the screws entirely
It usually holds with tiles on chipboard if you use S48

 

[kulle]

I agree with ninos's suggestion, it will definitely be good.

 

[Krillew]

Nino I'm going with your suggestion... Thanks!
The plasterboards are usually reinforced so they are a bit extra stiff.. I'm going with those..
I'll check if Beijer has Ardex.