if that was my ceiling i would take the boards down and put noggins in , its going to be a waste of time skimming that if you dont want cracks and joint lines
of course skim will cover it but just be aware that you may have a crack at some point as in my opinion there is not enough screws holding the board up along the joint no matter how many screws you put along the joists it would have been better putting noggins in to pull the board up tightWill the skim not cover this kind of thing assuming I finish screwing all the boards with lots more screws? This is still being used as a garage so not looking for aesthetic perfection.
I'll take some more photos tomorrow with a proper camera.
Does nobody agree the problem is he's put screws between the boards instead of into them?
I pushed up the sagging part and screwed in at ~5" spacing. The result is better but still sags 2.5mm on the one board I tried.
I was planning on having it skimmed. Will the skim not cover this kind of thing assuming I finish screwing all the boards with lots more screws? This is still being used as a garage so not looking for aesthetic perfection.
I'll take some more photos tomorrow with a proper camera.
I've draw lines on the boards so I know the centres of each joist. I think you've mistaken that for two boards.if you check the pics though it looks as if there is one screw between two boards. This would cause the boards to droop imo.
That should be 20 screws....but what he meant was he only put screws in @400mm on each joist so as "kingandy " said there would have only been 12 screws per board....
I spent a large part of yesterday adding more screws so now there's 50 screws per board.Due to the way that you’ve screwed them in, i.e screwing in one side then the other you’ve incorporated the sag/bow of the plasterboard into the ceiling.
...
The only solution I’m afraid is to take down the PB and refit in the correct manner. As the other guys have suggested, it’s worth fitting some noggins at the same time. Try spacing the screws at 250mm instead. You can re-use the same PB, but don’t re-screw into the same holes.
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local