How to repair water damage on a ceiling

Question

There was a leak from the bathroom above that's now been fixed, but the ceiling below has a stained patch that's slightly sagged. Can this be patched rather than fully replaced? Want it to blend in

Karl · Answer

Yes just cut out section of board finding the timber each side of sagged area. Fix board secure scrim tape and feather in two coats of plaster. But without seeing it there could be more prep needed.

Paul · Answer

Yes just cut out damaged area replace with board and tape and plaster a straightforward job really

Adam · Answer

Just cut out the sagged area, cut a new board out and replace, scrim over and skim over, use lots of water for the edging for that blend.

Michael · Answer

This can be fixed and a stain blocker can be used once fully dry this can be painted with the same colour as what you’re going on

Graham · Answer

If the leak’s been sorted above, you can usually repair the ceiling without ripping the whole thing down, it just depends how bad that sagging patch is. If it’s still fairly solid and not crumbling, you’d let it dry out fully first, then scrape back any loose or blown plaster, seal the stain with a stain blocker, and skim it back flat with filler so it blends in. After that you sand it smooth and paint the whole ceiling or at least feather it out wide so you don’t see a patch.

If the area’s gone soft or you can press it and it moves, then that bit of plasterboard has basically been damaged and it’s better to cut it out properly and patch in a new piece, tape the joints and skim it so it disappears. Either way, rushing it before it’s fully dry is what usually causes it to show back through or crack later on.

Stephen · Answer

Hi depending how old your property is ! 
Remove the Plasterboard back one joist past where the damage is and where the existing board is still flush to the joists.
Cut and screw fit new p-board. We normally cut the perimeter edges of the old ceiling so that the fiba tapes sit nicely then to don’t have to plaster to far into the existing ceiling. 
Pva the old ceiling roughly a metre square. Apply two coats of plaster skim feathering the edges flush with the existing ceiling, trowel up! 
If it’s a lathe and plaster ceiling just overboard the entire ceiling as putting moisture into old plaster is fighting a loosing battle and you will be loosening the next lot of plaster as it becomes brittle.
Be careful of one of the cowboy comments of here as it’s coming from a decorator! A sagging ceiling can’t be stain blocked it won’t make the ceiling flush again.

Dale · Answer

Good afternoon

Depends on how big and affected the area is 

Option 1 cut out affected area and patch

Option 2 reboard ceiling and skim

Where are you based? 

Many thanks 

MR SKIM 
Professional Plastering Service

Alfie · Answer

Cut out the sagged patch and any of the area damaged by the leak back to the next joice fix a plasterboard over the patch and the skim the patch and blend it to the current plaster

Jetnor · Answer

Yes you can patch if plasterboard is ok is not damage you can patch it with no problem

Awwal · Answer

It will need to be investigated for structural damage and if there’s none, it can be skimmed and ensure it’s smooth

How to repair water damage on a ceiling

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