remove or over tile ??

[skim]

Hi guys new to this forum have been reading posts for the last month and find it very informative. Im a plasterer by trade and have got 2 weeks of work so my challange is to strip all of the bathroom and re tile. all of the walls are plasterboard and i have removed 3 walls back to the stud. my question is the last wall had 2 layers of tile on it i have removed the first layer but the first layer is solid, is it better to remove this one back aswell or could i clean up the tiles and put a bondiing agent on it and tile ??

 

[Bubblecraft]

Hi & welcome to TF

 

[Bubblecraft]

It's always better to remove the tiles & prep your new substrate. Tile on tile can be be done but depends on what type of tile you are putting up. This also includes weight limits on your plasterboard, if this is what you are putting back up on your studs.

What type & size of tile are you putting up?

 

[skim]

Hi bubblecraft thanks for the quick response. The tiles are 400x250 ceramic tiles

 

[peteablard]

It's always best to remove, wouldn't advise anyone to tile on tile. It can be done but it's not good practice..... And welcome to the forum!!

 

[Bubblecraft]

Are the tiles that are stuck solid on a stud wall or solid wall?

 

[Bubblecraft]

If they are on a stud wall, just smash through them & get it back to the stud then re-sheet. I take it its not a large area being only one bathroom wall? You will be exceeding weight limits of your plasterboard tiling on top so best to re-sheet.

If they are on a solid wall & you are happy that the wall is square enough to tile from & tiles are sound, then & only then tile on tile. Double check for blown plaster. You will hear this by tapping on the tiles. Clean up your tiles with sugar soap, scratch the surface of the tile with an angle grinder to give you a good key then coat with an SBR. With the tiles you have chosen, you will be able to tile on top using Bal Grip (some prefer Bal White Star or using an cement based SPF. Depends on your tiling speed)

For your other 3 walls (and your forth if you are replacing the stud) sheet out with 12.5mm plasterboard. Your PB can take up to 32kg pm2. I know you are a plasterer & your natural instinct maybe to give it a skim but don't. You will be reducing your weight limit down to 20kg pm2. Plus you only have 2 weeks of so drying & tiling times are a no no. A 12mm ceramic tile inc adhesive & grout will weigh in at 28.52kg pm2 just to give you an idea.

 

[Bubblecraft]

...Double check for blown plaster. You will hear this by tapping on the tiles..

Sorry, forgot for a second your a plasterer lol

 

[skim]

thank you for the replys ill get my hammer to it for the sake of 3boards i think it will be worth it . cheers guys

 

[Bubblecraft]

Sounds a plan. Not the best way to spend your holiday though lol

 

[chubchub]

Personally myself would remove exsisting tiles three layers of tiles seems a bit much for the plasterboard. Bit more work but an sds with a nice sharp spade bit shouldnt take to long. Wear some glasses though mate you dont want a splinter in the eyeball. Not nice.