opening for a 900mm shower tray

[Mgrant]

What should the opening be for a 900mm shower tray. Looking at a drawing and there is a 900mm opening ( shower tray surrounded by 3 walls). Will this not be a bit tight for a 900mm tray. Is on a new build premises.

 

[Best]

Top of tray will generally have a very slightly smaller length than stated size of tray because most trays are tapering.
In other words, a 900mm tray will likely be perhaps 890/895 mm at top, but 900 at base approx. Although trays vary.
So the finished opening (finished Plaster or boarding) for a 900 tray should be okay at 900mm, but would be perfect a few mm less.
You want the top of the tray obviously to be fairly tight to the finished wall surface usually.
I know of one of the big sheds bathroom salesgirl told a friend of mine that their shower tray couldn't fit as the architects plan showed space for tray was a few mm less! :smile:

 

[SimonG]

Tight as you can is best. Is it plasterboard its going against or solid plastered wall?

 

[Best]

That's why a decent plan should specify the exact space for tray.
I am sure the builders will be highly accurate with marking out and building the walls and make the opening the 5mm tighter. If you are lucky. :grin:

 

[Mgrant]

he opening is exactly 900mm without plasterboards on. It will be a studwall

 

[SimonG]

Somebody has screwed it up then and forgottent to allow for the boards. Could end up having trouble getting the door in.

 

[Mgrant]

What should the opening be in the stud work for a 900mm tray?

 

[SimonG]

900 plus 12.5 for each side for the boards and then any extra if its getting skimmed.

 

[joni os]

If tray has upstand then tiles must fit inside, consideration of tile thickness necessary otherwise opening too small for door. Normally would allow 920mm between studwork.

 

[Best]

What should the opening be in the stud work for a 900mm tray?

About 900mm plus width of 2 boards and minus 5 mm or so, if you want it exact.
Around 920mm or more

 

[Stanios]

Wouldnt you have tiles on top of the tray making up for any gaps anyway?

 

[Best]

Wouldnt you have tiles on top of the tray making up for any gaps anyway?

You really don't want any gap. You are better the tray is tight to wall and the full thickness of the tiles are onto the tray, if possible.

 

[Stanios]

You really don't want any gap. You are better the tray is tight to wall and the full thickness of the tiles are onto the tray, if possible.

can you cut the plasterboard around for the tray to fit?

 

[Best]

can you cut the plasterboard around for the tray to fit?

Yes you can, but that will mean the final fit of tray is less wide and you need to make sure the shower doors will still fit and not be too big even in shortest adjustment. A lot of doors will not adjust down enough and one tip to check is if the walls are plumb first! If a wall is leaning inwards at top, it will mean you go by that as that is the tightest place for shower door.
You won't be able to use a tray upstand if sinking tray into wall though.