Plasterboard without skim?

[lizziecupcakes]

Ah, so that explains why he's not so worried about the laths then, he's going to drop the ceiling.

Yes, exactly this. But i have no idea what it is. I’ll speak to the plasterer on Monday about it. It believe it will leave a thin air gap though, about 5mm between the plasterboards and the laths.

The plasterer wrote this to me before the weekend: “if gap is too wide may need to put a strip over the joists first. But will see when I'm over and discuss it with you”.

I’m going to see it paulc’s solutions will help tomorrow too.

Either way, I think these “strips” or paulc’s solutions will help level it out I’ll report back here!

 

[stuart45]

He's probably going to use thin battens or strips of hardboard etc. fixed to the joists. When fixing plasterboard the joists need to line up reasonably well. Even being 5mm out means that when you screw in, the board can spring back and the screw head goes through the paper. I always use a line to make sure studs or joists line up.
When they used laths, it didn't matter as much, because being timber they will bend to the shape, and the lime plaster was thick enough to produce a flat surface.