Round wall with drywall - moisture issues?

[vojma]

I've got the idea to build a round wall - radius about 1500 mm - in a corner.

I've heard that you can bend plasterboards by moistening the paper on them before mounting. But since this is an exterior wall, the boards will be right up against the sealing plastic (TenoTät) and then the moisture won't have anywhere to go.

What do you think about this...? Is it asking for trouble?

I haven't started framing yet, so I still have the chance to reconsider.

 

[PatrikJ]

Isn't it possible to trace in the disc (a whole lot of tracks) and then bend?

 

[klaskarlsson]

I've decided to build a curved wall - radius about 1500 mm - in a corner.

I've heard that you can bend gypsum boards by dampening the paper on them before mounting. However, since this is an exterior wall, the boards will lie directly against the vapor barrier (TenoTät) and then the moisture has nowhere to go.

What do you think about this...? Am I creating a problem?

I haven't started framing yet, so I still have the chance to reconsider.

Letting gypsum boards lie directly against the vapor barrier (plastic) is a bit wrong to begin with, isn't it? A small air gap wouldn't hurt, right?

Otherwise, you could build a jig and construct the wall there, let it dry, and then mount it...

/K

 

[andersmc]

When you write "the moisture," do you mean the moisture that you applied to the boards to bend them, or do you mean the general humidity? It's not unusual for the gypsum to lie close to the plastic. That's often done.

 

[vojma]

I am referring to the moisture I have added myself.

 

[vojma]

Can't it be traced on the disc (a heck of a lot of tracks) and then bent?

I don't really believe in tracing the disc... Partly, I think the traces will be visible on the inside and partly, I think the disc will be difficult to put in place as it will be as flimsy as a sheet of blotting paper in an autumn storm.

/V

 

[bonnier]

There are more flexible materials than plasterboard, right?

 

[Cheesus]

Now I can't remember what the board is called, could it be lux-element or something like that. The kind used in bathrooms for tiling around round bathtubs and similar.

Someone surely knows what I mean.

I don't believe in plasterboard at all.

I don't know, but maybe you could soak an OSB board in water and then bend it, but that seems troublesome.

 

[OlaF]

Plaster can be bent easily. I haven't done it myself, but a friend of mine bent it as tightly as under a meter in radius and it turned out smooth and nice. I don't know how much he moistened it, but I have read descriptions of the procedure online, so google can probably help.

 

[PatrikJ]

Tongue and groove and then 6 mm gypsum maybe ??

 

[Mikael_L]

At my workplace, they had the reception area remodeled, and the carpenters made a curved wall (actually two, so it became a round room with two entrance holes in the middle of a larger area), the radius was probably about 1.5 - 2 meters.

Unfortunately, I haven't taken any photos during the work!

They framed it quite closely, guessing C/C 20-30 cm, then bent 6mm gypsum on that wall, and applied 2-3 layers of it.
Looked like it went smoothly, no soaking at least.

 

[Cheesus]

You always learn something... *puts on the dunce cap*

 

[Fasting65]

...or you can buy pre-bent boards from Knauf/Danogips:

Böjda skivor

However, Norgips recommends a 6mm board just as the previous speaker mentioned:
Norgips Svenska AB / Ytskiva 6

Gyproc also says that a 6mm board works:
Gyproc - Gyproc GSE 6 Ytskiva Ergo

You can moisten a 13mm board using the following technique according to Knauf/Danogips:
Böjd gipsskiva

 

[vojma]

OK - thanks for the tips. Hadn't thought about 6 mm gypsum in double layers. Will do a test to see how tightly these can be bent without moistening them first.

/V

 

[zankan]

to make it really good you can fit in 2 pieces of 4 mm plywood and then 2 layers of 6 mm plasterboard...

And ready-bent elements are super expensive, then it's almost cheaper to buy cast elements from a stucco artist...