Renovate guest toilet. 45 or 70 studs?

[Dr Benz]

I'm going to redo two walls and it will become a small toilet (about 90x120) Planning to install double plasterboard everywhere since the rest of the house has that standard.

How big is the difference between using 70 vs. 45 studs? If it's much more stable with 70, we'll go with that, but if we can save some space, that wouldn't be a bad thing.

However, I don't want a flexing wall or strange noise.

 

[Plupp 405730]

I'm redoing two walls, creating a small toilet (about 90x120). I'll be installing double drywall everywhere since the rest of the house has that standard.

How much difference does it make to use 70 compared to 45 studs? If it's much more stable with 70, we'll go with that, but if we can save some space, that wouldn't be wrong.

However, I don't want a flexing wall or strange sound.

45x70 makes a good partition wall, haven't you thought about using something like OSB+drywall instead of double drywall?

 

[Dr Benz]

45x70 makes a good partition wall, haven't you considered using something like OSB+gypsum instead of double gypsum?

Ok, then it'll probably be 70 like in the rest of the house.

Well, I would have if it was there before. But the house is built with single-layer gypsum and I added another layer to the walls and ceiling to avoid having to strip wallpapers and such. Plus, the old gypsum was nailed and started to sag in the ceiling.

So that's why it feels right to go with double gypsum here as well. There won't be any tiles, just painted, so no weights.

When we eventually redo the bathroom, it will probably be OSB inside the actual bathroom.

 

[Plupp 405730]

Ok then it'll probably be 70 like in the rest of the house.

Yes, I would have if it existed before.
But the house is built on single layer drywall and I added an extra layer on the walls and ceiling to avoid removing wallpaper and such. Plus the old drywall was nailed and started to sag in the ceiling.

So that's why it feels good to go with double drywall here as well. There won't be any tiles, just paint, so no weights.

When we eventually redo the bathroom, it will probably be OSB inside the actual bathroom.

Ok I understand, but in bathrooms, you shouldn't use OSB, instead construction plywood 15mm is what most industry recommendations suggest...

 

[Dr Benz]

Ok I understand, but in bathrooms you should not use OSB but construction plywood 15mm is what most industry recommendations say..

Ah. Thanks for that. Good input. I'm not there yet but I will read up on it when it's time in a few years. But now I have that with me. 👊🏻

 

[nimhed]

Will be redoing two walls and it will be a small toilet (about 90x120). Will be putting double gypsum everywhere as the rest of the house has that standard.

How much difference will it make to have 70 compared to 45 studs? If it becomes much more stable with 70 then we'll go with that, but if we can save a little space, that's not wrong.

However, I don't want a flexing wall or strange sound.

Not infrequently, you have a door you want to reuse, and it seems appropriate to adjust the wall to the thickness of the door frame.

 

[Dr Benz]

Not infrequently, you have a door you want to reuse, and it feels appropriate to adapt the wall to the door frame's thickness.

Yep. That's not the case here, as all the old doors have gone because the frames were set incorrectly, and they needed repainting. Faster and almost cheaper to replace.

So it will be a new frame and door here as well.

 

[Jontha]

What is worse than single drywall as a wall? Double drywall! How fun it must be with installations, or just something like hanging a picture. Plugs and patch jobs everywhere.

Having 45-studs on double drywall just sounds terrible. I mean, what kind of bathroom is that really? Thinking of washing your hands after a session? You can't hang a sink on any drywall, especially if it's 45-studs. What happens when someone manages to pee on the wall a few times and the drywall collapses?

 

[Plupp 405730]

There is something called "kortlingar" in a wall..
An old and well-proven method..

 

[Dr Benz]

What is worse than single drywall as a wall? Well, double drywall! How fun it must be with installations, or just something like hanging a picture. Plugs and ugly repairs everywhere.

Having 45 studs on double drywall just sounds terrible. I mean, what kind of bathroom is it really? Were you planning to wash your hands after doing your business? You can't hang a sink on any drywall, especially if it's 45 studs. What happens when someone has managed to soil the wall a few times and the drywall starts sagging?

Oh dear... so much hate against drywall. Made too many drywall figures as a child?

It's perfectly fine to hang things on drywall. You should probably have stone walls so you can feel secure.

You can also reinforce so that you can hang whatever you want. But the question wasn't about drywall or not.

Unfortunately, there's always someone who has to voice their opinion at the wrong place. I've explained why it will be drywall everywhere.

 

[droopy]

Will be redoing two walls and it will become a small toilet (about 90x120). Will be putting double gypsum everywhere since the rest of the house has that standard.

How much difference does it make to have 70 compared to 45 studs? If it's much more stable with 70, we'll go with that, but if space can be saved, it's not a bad thing.

However, I don't want a flexing wall or weird noise.

45 studs and 12mm plywood + gypsum provide very stable walls and save some space. It also becomes easier to mount things on the walls. OSB is really bad when it comes to things that need to be mounted on walls. OSB is not much to screw into.

 

[Dr Benz]

Well, of course, that's the best but not the cheapest option.

Now the whole house consists of double plasterboard, so it will continue that way. Except maybe when we renovate the bathroom. But we're not there yet.

We have moved the door so now it doesn't matter for the sink and access if the wall is 70 with double plasterboard on both sides. So it feels like a good solution for us.

 

[droopy]

Well, that's of course the best but not the cheapest.

Now, the whole house is made of double gypsum so it will continue that way. Except maybe when we renovate the bathroom. But we are not there yet.

We have moved the door so now it doesn't matter for the sink and access if the wall is 70 with double gypsum on both sides. So it feels like a good solution for us.

You can put 12mm plywood up to a certain level and then place gypsum on the upper part where nothing should hang/mount. So that there is double gypsum on top behind one layer and plywood below behind the final panels. That way, you save a little on plywood boards.

 

[AXS]

Would not build a wall with 45x45, but 45x70 "wrong" way might be okay if every centimeter counts.

45x45 is usually very warped, not good to build with...