Putting wool fibre boards on uneven walls

[Jblakes]

Good morning,

Pretty much as the title said, I have levelled the wall up by plastering it flat ish (the wall bows alot). So started in one corner and working across.

The boards where all going on fine, then I go and find a few areas that are very uneven. What's the best course of action. Smash the raised bits off, or cut the thickness of the boards (they are 25mm) to level it up.

Kind regards
James

 

[Cubist]

Hi, how large is the disparity and over what area?

 

[Jblakes]

I'd guess around 5mm ish, issue is because some boards are already put on the wall, the uneven areas make the boards stand out again around 5mil ish. So something will be needed or will have a wonky plasterer wall

 

[88v8]

I'd guess around 5mm ish, issue is because some boards are already put on the wall, the uneven areas make the boards stand out again around 5mil ish. So something will be needed or will have a wonky plasterer wall

How old is the house?

Sometimes one should embrace wonky.

My lime plastering.

 

[Jblakes]

Oh that looks nice, house is 1721, so pretty old

 

[Cubist]

I'd guess around 5mm ish, issue is because some boards are already put on the wall, the uneven areas make the boards stand out again around 5mil ish. So something will be needed or will have a wonky plasterer wall

Hi James, for that kind of variation I would be tempted to try to 'plane' off the high spots on the plaster wall using something like a heavy duty cabinet scraper or multi-tool rather than trying to reduce the thickness of the boards.

 

[Jblakes]

That's what I'm going to do, just wanted to check that was the best way to do it

 

[Jblakes]

So boards are now up and plastering to follow. I have a few questions first though.
1) do I need to put corner beading things around the window and chimney, where boards meet each other purpendicularly (right angle?) or will render mesh be OK.

2) as we have a Chimney in the bedroom, I didn't want to put lost insulation right up to it, so left a gap. Now where I have put boats on the wall upto the ceiling, I can feel the chipboard (or whatever it is) on the ceiling it cold. What should be done, can I continue attaching wood boards right upto the roof to add some moisture contol and stop draft, then add insulation pushed upto it? Or will that cause issues?


Kind regard James