wall not level in dormer need to tile on to it - best substrate.

[tonytiger]

Hello all. I have been browsing for a while but can't seem to get the info i need so I think t is time to ask. Hope someone can help.

I am refitting my bathroom. I have a lifetime of of DIY experience but am a DIYer not a pro. Money is tight at the mo, and so I can't afford to hire a tiler, (or plumber, or plasterer) but am happy to do the work myself.

I am tiling floor to ceiling and all the walls except one are level. The wall behind the bath is in a dormer, and where the dormer meets the original wall it dips in 10mm from start to finish, over a diagonal length of about 1000mm. I have tried to compensate first by leveling off with boninding then i read that this was no good to tile on, so i chipped it and the old plasterboard off. Then i put new board up, but slope is there. So first question - is this a problem? Tiles are 600 x 300 porcelain. If it is a problem what should i use to render wall to make it match the other wall. I was thinking of finishing plaster but have also seen posts about using sand and cement.

Thanks in advance for any help.

 

[Mike]

you'd be best taking the board/s off and straightening the studs or just screw new ones adjecent to the old ones

 

[Rich]

Good advice above.

 

[White Room]

Take the board off where it dips and pack out with timber so it's going to be level to the adjoining boards...

 

[kilty55]

as above pack out the existing timber to suit

 

[tonytiger]

Thanks for the replies.

OK so i have taken off the board packed out the studs and put the board back on - This has helped a lot, but the two walls are still not flush with each other. However the fault it seems lies with the wall that the cheeks are built on to. I can't bring the board on the cheeks out any more as once i have tiled it, i will be left with no window frame. So i have decided to skim a portion of the other wall to make it match the cheeks. My question then is what should i use to skim with? It will be up to 7mm in a couple of places. I was thinking finish, but not sure with the thickness. I reckon i will only be doing approx 600m wide by 1000mm section.