MortarThePoint Posted May 28, 2022 Share Posted May 28, 2022 I'm building the partitions of a bathroom and it's 1200mm wide for a 1200mm x 800mm shower tray. I'll be tiling onto the top of the tray (as shown below), but if I make the room 1200mm will the shower tray definitely fit or is there a tolerance that could catch me out. I'm hoping the tolerance is +0 / -Xmm so not allowed to be oversized, but hope isn't good enough. Does anyone know. I can easily wiggle an extra 3mm out of the plasterbard (1.5mm gap at each end) but wouldn't want to go much further. Link to comment Share on other sites More sharing options...
PeterW Posted May 28, 2022 Share Posted May 28, 2022 30 minutes ago, MortarThePoint said: I can easily wiggle an extra 3mm out of the plasterbard (1.5mm gap at each end) but wouldn't want to go much further. Plasterboard or cement board ..? The latter is a pig to adjust. Tray will be about 2-4mm different in size - usually less than dimensions quoted. 1 Link to comment Share on other sites More sharing options...
MortarThePoint Posted May 28, 2022 Author Share Posted May 28, 2022 25 minutes ago, PeterW said: Plasterboard or cement board ..? The latter is a pig to adjust. Tray will be about 2-4mm different in size - usually less than dimensions quoted. 12.5mm Plasterboard over 11mm OSB Link to comment Share on other sites More sharing options...
PeterW Posted May 28, 2022 Share Posted May 28, 2022 Moisture proof board I am assuming ..? And why OSB and PB when a single skin of cement board would be quicker and cheaper ..? 1 Link to comment Share on other sites More sharing options...
SuperPav Posted May 28, 2022 Share Posted May 28, 2022 I wouldn't put PB in a shower enclosure personally when you can use cement board or marmoxboard. Another thing to bear in mind in terms of the width is the tiles you're planning on using. If you're using 300 or 600 tiles, don't make the back wall less than 1205-1210mm (tile that one first before the sides) as otherwise you'll need to be shaving off a couple of mm off every other course of tile to fit between the walls! Link to comment Share on other sites More sharing options...
MortarThePoint Posted May 28, 2022 Author Share Posted May 28, 2022 28 minutes ago, PeterW said: Moisture proof board I am assuming ..? And why OSB and PB when a single skin of cement board would be quicker and cheaper ..? Yes moisture resistant plasterboard. I have the materials on site so that saves time. Link to comment Share on other sites More sharing options...
MortarThePoint Posted May 28, 2022 Author Share Posted May 28, 2022 23 minutes ago, SuperPav said: I wouldn't put PB in a shower enclosure personally when you can use cement board or marmoxboard. Another thing to bear in mind in terms of the width is the tiles you're planning on using. If you're using 300 or 600 tiles, don't make the back wall less than 1205-1210mm (tile that one first before the sides) as otherwise you'll need to be shaving off a couple of mm off every other course of tile to fit between the walls! I'm avoiding Hardie Backer and the like. Also I'd tank the moisture resistant plasterboard Link to comment Share on other sites More sharing options...
wozza Posted May 28, 2022 Share Posted May 28, 2022 Can you not fit the tray before building the wall? Link to comment Share on other sites More sharing options...
MortarThePoint Posted May 28, 2022 Author Share Posted May 28, 2022 17 minutes ago, wozza said: Can you not fit the tray before building the wall? I haven't got the tray yet and it could get trashed if I did Link to comment Share on other sites More sharing options...
Conor Posted May 28, 2022 Share Posted May 28, 2022 Get the tray. Ours was nearly 10mm longer and wider than stated. 1 Link to comment Share on other sites More sharing options...
MortarThePoint Posted May 28, 2022 Author Share Posted May 28, 2022 31 minutes ago, Conor said: Get the tray. Ours was nearly 10mm longer and wider than stated. That was my fear. Is there anywhere you can think of with shower trays on the shelf? Would be good to unblock progress Link to comment Share on other sites More sharing options...
PeterW Posted May 28, 2022 Share Posted May 28, 2022 2 hours ago, MortarThePoint said: I'm avoiding Hardie Backer and the like. Also I'd tank the moisture resistant plasterboard why..?? You only need to do the joints on cement board, with your approach you have 3 layers, 3 times the Labour ..? 6 minutes ago, MortarThePoint said: That was my fear. Is there anywhere you can think of with shower trays on the shelf? Would be good to unblock progress what size ..? And depth ..? Any particular style ..? Link to comment Share on other sites More sharing options...
Conor Posted May 28, 2022 Share Posted May 28, 2022 (edited) 34 minutes ago, MortarThePoint said: That was my fear. Is there anywhere you can think of with shower trays on the shelf? Would be good to unblock progress Or, you can just do what I did and trim the plasterboard away! My tray has a good 40mm wide shoulder so no issues with a bit of a thicker build up over it. I'd advise against having anything fragile on site longer than needed. I caught the sparks sitting on the shower screen box 🤬 Edited May 28, 2022 by Conor Link to comment Share on other sites More sharing options...
MortarThePoint Posted May 28, 2022 Author Share Posted May 28, 2022 (edited) 37 minutes ago, PeterW said: what size ..? And depth ..? Any particular style ..? 1200mm x 800mm reasonably low. Not too fussy about style but needs yo be white or very light grey, but the waste needs to be in the middle of the short end or in the corner shown below. Something like : https://www.screwfix.com/p/mira-flight-low-rectangular-shower-tray-white-1200-x-800-x-40mm/1906x Edited May 28, 2022 by MortarThePoint Link to comment Share on other sites More sharing options...
PeterW Posted May 28, 2022 Share Posted May 28, 2022 Toolstation do them on 3 day delivery as do Victoria Plum. When do you need it ..? 1 Link to comment Share on other sites More sharing options...
MortarThePoint Posted May 28, 2022 Author Share Posted May 28, 2022 22 minutes ago, PeterW said: Toolstation do them on 3 day delivery as do Victoria Plum. When do you need it ..? It was my plan to get the walls up this weekend 🙂 Change of plan time Link to comment Share on other sites More sharing options...
MortarThePoint Posted May 30, 2022 Author Share Posted May 30, 2022 (edited) On 28/05/2022 at 13:51, Conor said: Get the tray. Ours was nearly 10mm longer and wider than stated. Just went to City plumbing and they said would be spot on but was slightly over 1210mm. That was the with up stand type (see pic below), which may be slightly larger. The guys in the store were genuinely surprised when they saw what I measured. This was a 4 sided up stand Mira Flight 1200mm x 800mm. Edited May 30, 2022 by MortarThePoint Link to comment Share on other sites More sharing options...
MortarThePoint Posted May 30, 2022 Author Share Posted May 30, 2022 Attached are the dimensions sheets that Mira emailed me, converted to images Link to comment Share on other sites More sharing options...
Temp Posted May 30, 2022 Share Posted May 30, 2022 Our builder was a stickler for checking stuff like this. Never drilled, cut, ordered or built anything until he had actual thing that was going to fit in it. So things like windows weren't ordered until he built all the openings. Said he was fed up getting caught out. Link to comment Share on other sites More sharing options...
MortarThePoint Posted May 30, 2022 Author Share Posted May 30, 2022 1 hour ago, Temp said: Our builder was a stickler for checking stuff like this. Never drilled, cut, ordered or built anything until he had actual thing that was going to fit in it. So things like windows weren't ordered until he built all the openings. Said he was fed up getting caught out. I can understand that. Murders the timeline though Link to comment Share on other sites More sharing options...
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