Stud wall with large recessed niche

[jacko555]

I'm building a stud wall in bathroom, 2200x1710 to hide plumbing/recessed taps.

A 1500 bath will sit alongside the 1770 width of the wall.

Original plan was 50x100mm studs with tile backer board attached and tiled.

Wife has just asked for a recessed niche the length of the bath.

I'm unsure of the best way to lay out the studs with such a big gap in the middle. Slightly concerned the top of the niche may sag?

How's this for a starter for 10

All using 50x100 cls

Will this work? Any advise or better ideas? I guess I could run 2 bits of angle iron supporting the beam labelled "top" if sag is an issue?

Or maybe large angle brackets liberally placed along the horizontal top stud, and, the studs resting on it?

Or am I worrying about nothing and that'll be fine

Appreciate any advice

 

[^woody^]

Turn the top timber on edge and double it.

 

[Deleted member 292770]

install a top plate and screw it .how can it sag?

 

[SFK]

In addition to above,
You need a top plate on ceiling and bottom plate on floor.

And for the uprights separation you should consider the width of the backer/plasterboard so plasterboard has something to screw to and be supported for their entire height (40cm or 60cm separation is normal for 120cm wide boards).

Fill gaps between studs with insulation to keep backer/plasterboard and tiles warmer (reduces condensation on tiles and toilet noises outside room).

Also consider putting wood (studs or noggins) behind backer/plasterboard wherever you need to screw something. For example, toilet paper holder, mirror, uprights for glass screen, toilet cistern, curtain rail.

 

[SFK]

Forgot to add, in niche, slope tiles slightly forward so that any water or condensation runs forward (does not collect at back).

 

[mikeey84]

2 things:
don't use plasterboard, and see if you can get a pre made niche the size you need. It means it much less likely to leak.

Edit, just seen you are using backer board. Ignore point one!