Take down or overboard ceiling ???

S

Stanbra

Member
Hello lads, the ceiling up is 12.5mm boards and when looking across it looks wavey where is sags in between joists

Should I take down and board or just over board with 15mm boards and 50mm screws ??

Could do with little mess as possible.
 
Either take it down and fix noggins @400mm centres and board. Or
Over batten the existing and fit plasterboard.
 
Stanbra said:
How come I cant just overboard ?
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Because it sounds like the joists are too far apart and causing the board to sag. If you batten it first it will pull the sagging up and your new board will then be fixed to the batten nice and flat ready to plaster.
 
Deri said:
Because it sounds like the joists are too far apart and causing the board to sag. If you batten it first it will pull the sagging up and your new board will then be fixed to the batten nice and flat ready to plaster.
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Is it not sagging because its 12.5mm boards and not got noggins in ? Also if I was to overboard would it not pull it up anyway... And thanks for the replies, just come out my time and appreciate all the info I can get !
 
Stanbra said:
Is it not sagging because its 12.5mm boards and not got noggins in ? Also if I was to overboard would it not pull it up anyway... And thanks for the replies, just come out my time and appreciate all the info I can get !
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You'll pull tight to the joists and sag where it's sagging now, doing precisely the square root of fcuk all good.

Batten crossways to the joists and you can't go wrong.
 
It's probably sagging because the joists are too far apart and no noggins either, but obviously I don't know this without seeing it? Do you know for sure it's 12.5mm board? It might be 9mm which won't help.
 
Stevieo said:
You'll pull tight to the joists and sag where it's sagging now, doing precisely the square root of fcuk all good.

Batten crossways to the joists and you can't go wrong.
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Crossways is what I mean man! I would have thought that would be obvious or how else are you going to get the correct centres ffs.
 
Deri said:
It's probably sagging because the joists are too far apart and no noggins either, but obviously I don't know this without seeing it? Do you know for sure it's 12.5mm board? It might be 9mm which won't help.
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I cut hole in and measured the board, deffo 12.5mm... I already gave a price to do it and don't really want to buy any timbers. Do you think I'm best off just ripping old boards down and boarding it with 15mm ?
 
Roofing batten is only like 20p a length and by the time you've pulled the ceiling down and got rid you would have battened it out and ready to board???
Remember to batten crossways and at 400 centres too[emoji6]
 
Stanbra said:
I cut hole in and measured the board, deffo 12.5mm... I already gave a price to do it and don't really want to buy any timbers. Do you think I'm best off just ripping old boards down and boarding it with 15mm ?
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Listen to Deri.
 
Deri said:
Crossways is what I mean man! I would have thought that would be obvious or how else are you going to get the correct centres ffs.
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I never said you didn't.

It's just that this chap can't understand why he can't overboard a wonky ceiling. so God knows what he'd do with his battens.
 
Is it not sagging because its 12.5mm boards and not got noggins in
The noggins are there to prevent deflection and twist in the joists, won't affect your ceiling
 
jimbo71 said:
Is it not sagging because its 12.5mm boards and not got noggins in
The noggins are there to prevent deflection and twist in the joists, won't affect your ceiling
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It's sagging because the joists are too far apart probably.
If the existing boards were to come down and the customer wanted to keep the ceiling at the same present height then noggins would need to be used to give the required fixing to eradicate the sag in the boards.
We all should know (if we do a lot of studwork etc) what the true purpose of noggins are for. But if you go with 400c you generally will be OK without.
In this case it would be easier to counter batten, board, skimm and go home [emoji3]
 
Deri said:
It's sagging because the joists are too far apart probably.
If the existing boards were to come down and the customer wanted to keep the ceiling at the same present height then noggins would need to be used to give the required fixing to eradicate the sag in the boards.
We all should know (if we do a lot of studwork etc) what the true purpose of noggins are for. But if you go with 400c you generally will be OK without.
In this case it would be easier to counter batten, board, skimm and go home [emoji3]
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This is how I was taught to nog - always catch the ends of the boards as well as prevent any warping of the joist.

From memory, the kit houses come with 400c joists and 600c rafters. The company supplied noggins for the upstairs ceiling and herringbone for downstairs but we used to throw them out and cut nogs.

I remember having a new joiner on site - just out of his time - asked to nog out a room ready to board. When we came to board, the nogs were all over the place. They'd run out by the end of the first board.

When we looked, the joiner's little blue line went from 1.2 off the wall and ran sweet as you please all the way to a bfo splinter about 1.6 in the middle and all the way back to 1.2 at the other end.

And the bell end had followed it.


Take down or overboard ceiling ???
 
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