shower tray trouble

[BigAl]

I'm replacing a 1200 shower tray and have bought another 1200 tray. Except this new tray is 1210! grrrr. My original plan was to plasterboard, tank, slide in tray, silicone, tile and silicone again. But now the plaster board will have to sit on top of the shower tray. What's the best way to seal it? Is it worth getting some upstands?

[paul flight]

12mm wpb ply on the shower walls, then tank , then tile. leave a 2 mm gap between the tiles and the tray . donot grout this 2mm. after grouting has dryed silicon between the tray end tiles and do the same in the corner here tiles meet

[mikethetile]

its worth double siliconing,

silicone all round the tray then silicone the bottom joint after its tiled

[paul flight]

mike is right silicone twice!!

[easyt]

12mm wpb ply on the shower walls, then tank , then tile. leave a 2 mm gap between the tiles and the tray . donot grout this 2mm. after grouting has dryed silicon between the tray end tiles and do the same in the corner here tiles meet

If you tank or seal just one side of a ply panel doesn't it have a tendency to warp ?

[paul flight]

no prime it with sbr then tank it . if it is battend and screwed at 200 centers it wont move . its all about how well you prepair the walls before tanking and tliing.!!!! the better the prep the better the finish.......

[Scott]

Why not use cement backer board? Unlike ply and plasterboard its impervious to water, the obvious solution imo

[Richard Edwards]

Spot on Scottley - Remove plasterboard and use 12mm Lux or similar, Tape the corners - and seal with pucker Lux sealing compound and away to go.

If this is no good - dimension wise, then remove old plasterboard and chuck it. Fit tray and then fit new plasterboard, leave a 2/3 gap under it - enough to get Ditra / Imperband in well behind the tray and then apply tanking membrane - ie Ditra / Imperband to the new plasterboard and slot down the sides of the tray and secure. Silicone the tray to the outerface of the membrane and start the tiling the next day.
PS lay the sheet membrane horizontally with an overlap of about 50/80mm and seal overlap with cementous sealing compound.

That will work

[diamondtiling]

no prime it with sbr then tank it . if it is battend and screwed at 200 centers it wont move . its all about how well you prepair the walls before tanking and tliing.!!!! the better the prep the better the finish.......

Why use a timber product in a wet area when so many superior products are available?

[Phil Hobson]

Why use a timber product in a wet area when so many superior products are available?

My question also, backer-board would be my 1st choice

[BigAl]

Thanks for replies - I have the Mapei showerproofing kit because I've built some niches - could I use that on the plasterboard, silicone the plasterboard to the tray, then tile? Like so....

[Richard Edwards]

You could, as long as the tanking layer (not sure about the Mapei product as not one I use or familar with) is properly sealed and tanked at the bottom corner and under the ' tanked plasterboard ' edge.

Its a bit like asking an Irishman -
[Q] Can you tell me the way to Galway ?
[A] Yes I could.
[Q] Well then - which way Paddy ?
[A] If I was going to Galway, I would not start from here. !

Most of us on here would not start from here - we would use 12mm cementous board - several brands or a flexible sheet PE / cotton flock membrane - several brands

See you in Dublin or was it Galway you going to.?

[Scott]

Looks ok, i have used the Mapei gum and found it ok. However i would still use the cement boards if you can

[BigAl]

You could, as long as the tanking layer (not sure about the Mapei product as not one I use or familar with) is properly sealed and tanked at the bottom corner and under the ' tanked plasterboard ' edge.

Its a bit like asking an Irishman -
[Q] Can you tell me the way to Galway ?
[A] Yes I could.
[Q] Well then - which way Paddy ?
[A] If I was going to Galway, I would not start from here. !

Most of us on here would not start from here - we would use 12mm cementous board - several brands or a flexible sheet PE / cotton flock membrane - several brands

See you in Dublin or was it Galway you going to.?

Ay, but if I start from here it's cheaper, I already have a ticket and I'll still get there all the same.

[diamondtiling]

Ay, but if I start from here it's cheaper, I already have a ticket and I'll still get there all the same.

I will re-read that sentence after I have had a few Carlsberg exports, it might make sense then.