Thinnest board to tile on?

[MARTINOV]

Hello!

I'm planning to tile behind a fireplace, and there are lots of layers of wallpaper there today that are hard to remove. I'm thinking of screwing up some board to tile onto, but to avoid it looking odd at the ceiling trim/building too much thickness, I want to use the thinnest board possible.

Is there anything thinner than renovation gypsum that works for tiling? I've seen that there is masonite which is 2.4mm thick, does this work? I have also found the following board:



Would this work?

Thanks in advance!

 

[Johan Gunverth]

Plywood won't work. Nor will any other wood fiber-based board. It will move with the seasons and the grout in the tile will crack, and the adhesive might also come loose. You probably can't have combustible material so close to a stove, either. This applies to the entire material depth, not just the surface (the tile). Check out thin fiber cement board, like Cembrit, which is completely shape-stable. What material is behind the wallpaper?

Edit: Bauhaus has a construction board called Ultrament Doit 4 mm that might work?

 

[Kane]

Hi!

I'm thinking of tiling behind a stove, there's a lot of layers of wallpaper there today that are hard to remove.
I was thinking of screwing up some board to tile on, but to avoid it looking too strange at the ceiling moulding/building too much thickness, I want to use the thinnest board possible.

Is there anything thinner than renovation gypsum that works for tiling? I've seen that there is hardboard that is 2.4mm thick, would this work? I've also found the following board:

[image]

Would that work?

Thanks in advance!

6 mm renovation gypsum should work.
Isn't it a gypsum wall so you can replace the gypsum board where the wallpaper is?

 

[Dowser4711]

Yes, behind a stove there should be non-combustible material. For example, gypsum, minerit, metal, etc.

It *might* be possible to get approval with a plywood board protected by a layer of ceramic, but it feels like you have just as much risk of it being flagged by the chimney sweep.

Now, as mentioned, plywood is not a good option regardless, but *if* you want it, you should first contact your local chimney sweep to get an assessment that it will pass the fire safety inspection.

But the best and simplest way is, of course, to do it properly. Install a fiber cement board of 6-9mm or gypsum if you want a new layer instead of removing the wallpaper.

 

[MARTINOV]

Plywood doesn't work. Nor does any other wood fiber-based board. It will move with the seasons, causing the tile joints to crack, and even the adhesive can loosen. You probably can't have combustible material so close to a stove. This applies to the full depth of the material, not just the surface (tile). Check out thin fiber cement board, like Cembrit, which is completely form-stable. What material is behind the wallpaper?

Edit: Bauhaus has a construction board called Ultrament Doit 4 mm that might work?

Thanks for the reply and the board tip. I'm not sure, but elsewhere in the house, it's some fairly porous masonite-like board from the 70s.

6 mm renovation gypsum should work. Isn't it a gypsum wall so you can replace the gypsum board where the wallpaper is?

Haven't gotten past all the layers of wallpaper yet, and I can't find a seam either, but I'll try to figure it out.

Yes, behind a stove there should be non-combustible material. For example, gypsum, minerit, sheet metal, etc. It *might* be possible to get approval with a plywood board protected by a layer of ceramic, but it feels like you have just as much risk of it being flagged by the chimney sweep.

Now, as mentioned, plywood isn't a good option anyway, but *if* you want to use it, you should first contact your local chimney sweep to get an assessment that it will pass the fire safety inspection.

But the best and simplest is obviously to do it right. Put up a fiber cement board of 6-9mm or gypsum if you want a new layer instead of taking down the wallpaper.

Thanks, I'll drop the idea of a wood-based construction board. I have about 22cm between the back of the stove and the wall.