Plastering Bathroom

S

Sandy 1979

New Member
Hi

I’m fairly new to plastering and am currently renovating my 1930’s house. Ive just stripped the bathroom back to the brick outter walls and ash block internal wall.
After reading up about moisture resistant plaster board which I was intending to use, using the dot and dab method, I’ve realised it won’t take the weight of the large tiles we are using

So having looked at an option to put bonding coat on and tile over that it’s says it’s not suitable due to the amount of suction

So I’m a bit stuck as to what else to use as all the other British Gypsum products arn’t saying whether their suitable for use in a bathroom environment with tiles over the top

Thanks in advance
 
Sandy 1979 said:
Hi

I’m fairly new to plastering and am currently renovating my 1930’s house. Ive just stripped the bathroom back to the brick outter walls and ash block internal wall.
After reading up about moisture resistant plaster board which I was intending to use, using the dot and dab method, I’ve realised it won’t take the weight of the large tiles we are using

So having looked at an option to put bonding coat on and tile over that it’s says it’s not suitable due to the amount of suction

So I’m a bit stuck as to what else to use as all the other British Gypsum products arn’t saying whether their suitable for use in a bathroom environment with tiles over the top

Thanks in advance
Click to expand...
Did they say hardwall was ok ?
 
you could also use mechanical fixings along with dot/dab, if you are solid dabbing IE, fully dabbed lines along top bottom and sides and down the middle of your boards you would be able to use any size or thickness of tile I would think
 
I’ve read that plasterboard dot and dabbed will take 20 kg per sq/m - so don’t really want to risk it.

I’ve looked at Hardwall as suggested and it says it’s suitable for masonry but doesn’t mention if it’s suitable for a bathroom
 
tcd said:
you could also use mechanical fixings along with dot/dab, if you are solid dabbing IE, fully dabbed lines along top bottom and sides and down the middle of your boards you would be able to use any size or thickness of tile I would think
Click to expand...

Thanks TCD not something I had considered but worth looking at
 
Sandy 1979 said:
I’ve read that plasterboard dot and dabbed will take 20 kg per sq/m - so don’t really want to risk it.

I’ve looked at Hardwall as suggested and it says it’s suitable for masonry but doesn’t mention if it’s suitable for a bathroom
Click to expand...
plaster board sheet @ 2.4x1.2 = 2.88 m, by rule of thumb you should achieve two boards to one 25kg bag, but usually a sheet and a half, all depends on the wall, tbh sand and cement best way forward
 
If it's a hack off job, give it a wet and scud it first, half bag cement to bout 8 shovels sand, cap full of mortar mix and splash of unibond in it. Sand cement mix, a bag to 18 - 20 shovels of sand should be fine.
 
Simon85 said:
If it's a hack off job, give it a wet and scud it first, half bag cement to bout 8 shovels sand, cap full of mortar mix and splash of unibond in it. Sand cement mix, a bag to 18 - 20 shovels of sand should be fine.
Click to expand...
Youll need mortar mix too, but Ul need to adjust that to size of mixer etc
 
Sounds like one for TTF (The Tilers Forum) don't look the head moderator directly in the eyes, he has scaffoloditis , a condition that can lead to impotence and a weak bladder
 
Sandy 1979 said:
I’ve read that plasterboard dot and dabbed will take 20 kg per sq/m - so don’t really want to risk it.

I’ve looked at Hardwall as suggested and it says it’s suitable for masonry but doesn’t mention if it’s suitable for a bathroom
Click to expand...

Dot and dab PB will carry 32kg/m2 and is fine for majority of porcelain tiles prople tend to fit these days. It's only as good as the surface it's fixed too so dabbed on bare brick/block is best.
 
When we can not meet the specs of tile with pb
Standard to Hack off existing
Tiling backer boards fixed to plumb timbers
 
I
Danny said:
They have to be pretty special tiles to be too heavy for normal plasterboard
Click to expand...

something like a 10 mm limestone would be too heavy for pb
Although how many actually check Weights of tiles .. peeps usually just go over skimmed plaster lol
 
Don't mean to seem rude but if you never plastered you'll have no hope in hell of floating out the bathroom
 
Vincey said:
Don't mean to seem rude but if you never plastered you'll have no hope in hell of floating out the bathroom
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I never said I haven’t plastered anything - because I have, but I’m newer to it then some people here, I just want to work out what my options are, bearing in mind I’ve got an older house, not a new one thats built of plasterboard
 
Sandy 1979 said:
I never said I haven’t plastered anything - because I have, but I’m newer to it then some people here, I just want to work out what my options are, bearing in mind I’ve got an older house, not a new one thats built of plasterboard
Click to expand...
No worries, in that case my advice would be use a gypframe 70 mm system (metal frame) and insulate then use a Glasroc H tile backer board which should take upto 30kg/m2 to best of my recollection
 
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