missing out studs in narrow wall

[John D v2.0]

Hi all, just wanted some advice from those in the know please:

We are building an ensuite in our main bedroom from stud walls. The room door is in the corner and the ensuite is in the adjacent corner. See the plan attached not to scale..

We want to slope the ensuite down in order to minimise the visual impact but not so much that the basin area is too small.

The ensuite door is on that sloping wall and the section behind is just 500mm. Highlighted red on the drawing.

Question is regarding that red wall, would it be reasonable to put a double 63mm stud at the door end as normal, but then take a single plasterboard sheet (or maybe a double board) the full 500mm to the first stud of the wall behind the basin? Thus gaining a better sight line into the room without losing the same off the basin width.

 

[cdbe]

Hi, I did something vaugely similar with my utility room - as it's chopped off another room I needed it as narrow as possible so (on the lower half, below the worktop) I have the studs at about 700 centres so the washer and dryer fit "into" the wall between them (and same for the WC a bit further along - where the concealed cistern is partly set into the wall). I clad the outside of the wall with 18mm osb then 12.5mm pb and it's very solid.
Pictures aren't great but should give you the idea.

 

[^woody^]

MP's Brexit votes and JD's bathroom proposals, thats two things I don't understand now.

 

[John D v2.0]

MP's Brexit votes and JD's bathroom proposals, thats two things I don't understand now.

Woody you're getting grumpy in your old age!
Maybe i shouldn't have explained all the detail..

Short version: are the any gotchas of effectively plasterboarding one side of a wall only if the wall is narrow anyway. And any tips eg double board. Or is it a waste of time to save 70mm?

 

[John D v2.0]

@cdbe thanks and I notice you've a drainage heat exchanger, is it worth while? Did you get it to run multiple showers from a small boiler/gas supply or other reasons? As they look like they have a very long pay back time purely in gas savings, but if you already have a small boiler and add a second bathroom it is cheaper to add one of those.

 

[^woody^]

I've been grumpy in my young age, thank you very much.

I just can't understand why you want to do that, or how you would even get double plasterboard to work at each end.

If need be, turn a 38mm CLS sideways, and use two 9.5 or 12mm boards and skim to make a thin partition that can still be insulated. But there is still the awkward door lining thickness to deal with.

 

[arkie]

50x50mm with osb/plywood one side or both sides would be strong and save space, you could just use wood filler and paint the plywood on the inside.

 

[cdbe]

Hi John, we have a 145l unvented cylinder which is probably a bit on the small side for a 4 bed 2 bathroom house when we fairly often run 2 showers at the same time so it's to help with this and obviously save some gas. That one is for the new ensuite above it and we've only used it for a month so hard to say how well it works - but, the cold supply to the ensuite basin tap is tee'd off the cold supply to the shower so if I run the tap while the shower is on it comes out, not hot, but certainly very warm - so it must do something.
As for the payback, with what they cost and installation I would say in a domestic setting it's probably getting on for never - but I managed to get 2 off ebay for £56 each (the other will go on the main bathroom when we relocate it as part of other work) and fit them myself so hopefully a couple of years!

 

[23vc]

Wouldn’t you want a degree of acoustic insulation in all those walls (the mrs showering or going for a number 2 when you’re in bed?) which your plan wouldn’t allow for. Surely by doing it as a proper stud or reduced sideways one was per woody you’d still get your angled wall, just very slightly less so? Can’t see it being noticeable tbh

 

[John D v2.0]

Thanks all

But there is still the awkward door lining thickness to deal with.

Yeah that's going to be it. The other side of the door will be 63mm studs.

osb/plywood

That's a really good idea, 9mm ply under 9.5mm plasterboard might do it.

Wouldn’t you want a degree of acoustic insulation in all those walls

That's only one short wall next to the basin and away from the head of the bed. The shower wall will have plenty of insulation. There's no WC in the ensuite mainly due to wanting a big shower and partly due to the stack on that side only being 50mm.

Anyway feedback is useful, I'll decide the final choice when i get the first studs at each end up. I think you're all right a few mm won't affect the sight lines too much. The main thing is to avoid opening the bedroom door and looking straight at a wall.

 

[23vc]

That's only one short wall

Yeah, I get that, I’m just coming from the view that if any of it’s not insulated, it kinda undermines the rest of it being.

 

[John D v2.0]

Hi all thanks and just to follow up on your help, once i got that far it didn't seem so hard, i just ripped a slight angle on the door stud, backed it with some 3 by 2 sideways and cut down a bit of 4 by 2 to match the angle on the top plate. The bottom section will be a boxed in cupboard space.
I have put the internal plasterboards in and as you can see the external side board will support the floating edge of the internal board.
After all this hassle it made the sight line into the bedroom better and gave that extra space beside the basin.
Internal board only in place

The view as you enter the room

The space gained by the basin is the size of the timber

Thanks again for the help!