bare plaster board

[andrew pedley]

Hi guys ... I first need to say what a site ! all are helpful and friendly and all amazing tilers. A bit of back ground on myself, I am a plasterer living just outside of Cardiff who has a lot of patiences so I can tile to a good standard and good with my hands, the only thing I lack is knowledge and experience but that comes in time. So that's where you come into play !. I need some more advise please.

The job I'm on at the minute is a bathroom tiled over the bath to the ceiling which I've skimmed. I know from experience taking the tiles of the pb is going to smash them up and the owner told me when the tiler tiled it last he had to patch the pb at the top of the bath must of been water damage.
question is what to I replace the plaster boards with ? moisture resistance boards ? or something different ? and what are the price ?

Also where there is just painted walls can I just go ahead at tile straight onto them.


Thanks for all your help ............ Andrew.

 

[Stef]

Hi & welcome, stick up m/r plasterboard & tank it with a Mapei or Bal waterproofing kit.

Strip off the old paint on the other walls also.

You will get plenty of advice on here mate.

 

[suave]

welcome!

 

[Muse2k8]

Don't skim the boards (bare board is stronger) and tank any water sensitive areas.

 

[doug boardley]

what tiles are going on the wall? ceramic, porcelain, stone?

 

[andrew pedley]

They are porcelain Doug

 

[Deleted member 9966]

bare boards are the best if it's porcelain then. bare boards hold more weight than skimmed boards. somebody will be along soon no doubt with advice how to calculate the weight limits for your wall. welcome to the funhouse

 

[charlie1]

32kg per m2 for the plaster board and 20kg per m2 for plaster lol

 

[andrew pedley]

so do I really need to tank the wet areas then ? also what can I do about the painted walls ? . I was going to use 9mm ply on the floor and just tile it is that ok ?


thanks guys .....Andrew.

 

[White Room]

The minimum ply should be 15mm...

 

[Mike]

yes it's advisable to tank the wet areas as for the floor what's the substrate and is there any deflection there?

 

[mcquillantiling]

if your putting on porcelain tiles then you could remove the plasterboard and replace it with 18mm marine ply this will need to be tanked , make sure the ply is screwed on well

 

[Stewart]

if your putting on porcelain tiles then you could remove the plasterboard and replace it with 18mm marine ply this will need to be tanked , make sure the ply is screwed on well

IMO ply is an unsuitable substrate for wall tiles in any situation.....


Created on iPad.....

 

[White Room]

As above....

 

[andrew pedley]

the floor is just normal floor boards and its fine no deflections to worry about. as for using 15mm ply then 10mm tiles and then 10mm of adhesive 35mm step into the bath I dont think they will go for that. what about the walls with paint on them can I score them and tile them ?

 

[White Room]

Go for 6mm hardie backer glued and screwed on the boards....

 

[Deleted member 9966]

Hi & welcome, stick up m/r plasterboard & tank it with a Mapei or Bal waterproofing kit.

Strip off the old paint on the other walls also.

You will get plenty of advice on here mate.

Andrew, as Robson says, get rid of as much paint off the walls as you can. A steam wallpaper stripper might work if the paint is amenable. Personally I've used a sander to sand off the layers of paint. Once you get as much paint off as you can, get a suitable primer to prime the areas for tiling.

 

[Ian]

the floor is just normal floor boards and its fine no deflections to worry about. as for using 15mm ply then 10mm tiles and then 10mm of adhesive 35mm step into the bath I dont think they will go for that. what about the walls with paint on them can I score them and tile them ?

The adhesive will compress down to 3/4mm if you use a 10mm notched trowel. If the floor is deflection free, do as Whitebeam has suggested, then your total floor height will be around 22mm.

 

[widler]

good, a fellow plasterer to fight my battles with these blinkin tilers(only joking lads and lasses)

all advice good above,apart from the marine ply on walls,imo its no good.
ive have learnt a lot coming on here,although ive been tiling a fair few years as well as plastering,and these men and women make your standard of work go that one notch higher to keep up with there's.

right,crawling over with,off to tile a bathroom in ikkle brick tiles

 

[Mike]

as above, if the original floor boards are sound (as you say) then over board with 6mm cement board laid on spf adhesive and screwed every 150mm

 

[andrew pedley]

thanks guys, how much are these cement boards then ?

 

[Mike]

they probably vary but i pay abouit a tenner for a 1200 x 800 hardi in my local builder centre.