Backerboard+tiles+tile trims

adelast · Post by **adelast** » Tue Oct 12, 2021 9:08 am

Hi team,

I am not sure if this is the right space for this question but I'd like to read your opinion about an issue I am facing. As some of you might know, we are renovating our small ensuite. I have removed the old tiles and I still need to cleanup the old adhesive. My plan is to put a 6mm backboard+tiles on the shower side (right part of the picture), tiles on the back of the sink (central part of the picture) and then just paint for the rest of the wall (left part of the picture). The issue I am having is that from what I understood:

1. To attach the backboard to the wall I will need at least 1cm of adhesive thickness
2. To attach the tiles to the backerboard the recommended adhesive thickness is 1 cm
3. This means having a tile trim of 3.4 cm

(1+0.6+1+0.8)

What options do I have?

I am not sure I can scratch the right wall enough to put the backboard there, and keep the central part only with tiles (which would be okay as I am not tanking the entire room, just the shower).
Is here the only option to put backboards on the right and central part of the wall, and use plasterboard on the left side and re-paint it? In this way I will have tiles on the right and the center area without having a big difference with the original wall.

Any input here? Many thanks!

aeromech3 · Post by **aeromech3** » Tue Oct 12, 2021 4:43 pm

Don't know where you are getting the 1cm adhesive, normally a 6mm notch trowel is used and when the board / tile is pressed home this will end up about 4mm, you have a sample on your wall!
I have used 6mm backer on walls, though the recommended is 12mm which just an opinion is more for use across studs in a dry walls situation to give rigidity; also recommended is SS screws for fixings into the wall in addition to the adhesive.
see https://findanyanswer.com/goto/529426.

adelast · Post by **adelast** » Tue Oct 12, 2021 5:03 pm

aeromech3 wrote: ↑Tue Oct 12, 2021 4:43 pm Don't know where you are getting the 1cm adhesive, normally a 6mm notch trowel is used and when the board / tile is pressed home this will end up about 4mm, you have a sample on your wall!
I have used 6mm backer on walls, though the recommended is 12mm which just an opinion is more for use across studs in a dry walls situation to give rigidity; also recommended is SS screws for fixings into the wall in addition to the adhesive.
see https://findanyanswer.com/goto/529426.

Thank you for your reply Aeromech3!
I read only that the recommended thickness of adhesive for tiles is 1cm but it seems that I have misread?
The backboards I am planning to use are not the cement boards but the ones in this image. I need to use 6mm ones as the ensuite is extremely small and I want to avoid to reduce the space

finest1 · Post by **finest1** » Tue Oct 12, 2021 9:52 pm

hi adelast,

i am in a similar situation to you. check my post "can i tile on previous tile adhesive?" in the tiling forum.

from the link that aeromech gave you, check out the whole page, but pay attention to the last paragraph. if i ready correctly you will need to remove any old adhesive and plaster off the wall. apply a layer of cement mix to create a smooth surface, then you maybe able to put you board on top.

hopefully someone will verify what i have just suggested. i was thinking of doing this on my situation, but i need to put board on concrete surface. it will save me time and give me a good surface to tile on, but again, awaiting if this is a good idea

where are you getting the backing boards from?

finest1

adelast · Post by **adelast** » Tue Oct 12, 2021 9:56 pm

finest1 wrote: ↑Tue Oct 12, 2021 9:52 pm hi adelast,

i am in a similar situation to you. check my post "can i tile on previous tile adhesive?" in the tiling forum.

from the link that aeromech gave you, check out the whole page, but pay attention to the last paragraph. if i ready correctly you will need to remove any old adhesive and plaster off the wall. apply a layer of cement mix to create a smooth surface, then you maybe able to put you board on top.

hopefully someone will verify what i have just suggested. i was thinking of doing this on my situation, but i need to put board on concrete surface. it will save me time and give me a good surface to tile on, but again, awaiting if this is a good idea

where are you getting the backing boards from?

finest1

Hey finest1, thanks for your reply! I bought a multi tool with a scraper adapter that hopefully will help me to remove the old adhesive. I bought the backing boards from bath1.co.uk, they should arrive in 2 days. I'll check your thread too, thanks!

finest1 · Post by **finest1** » Wed Oct 13, 2021 10:19 am

i used a sds chisel bit on my SDS drill to remove mine. just go in at an angle so you don't dig too deep and gouge out the masonry behind. just an idea

i'll check back to see any other comments

thanks