I have a loose patch approx 2ft diameter on an overpapered lath & hair plaster ceiling.
I can get to the rear of the laths (loft).
Does the prop it & pour on loose mix plaster method work?
I envisage hoovering out the back of the laths, wetting with a spray, pouring on the plaster, move it around to try & get it down & around the laths, leave to set, remove prop whilst praying.
Any gotchas here? Any top tips here? Ordinary plaster? Bonding agent? Scrim/mesh?
TIA
NB it's not a hole....yet!
Shurely that's the "who's put a bloody striplight right over the loft hatch" approach...
Possibly glue it back from the top with neat PVA first.
I would use a prop and a suitable size board to push it up from the underside first.
From above, then give the whole area a liberal coat of neat SBR (or slightly diluted PVA if you can't get SBR), then trowel over some wet ish bonding plaster while the SBR is still wet. Leave it all to dry, and it should be well and truly fixed. Scrim not required.
I'd not push it right back up yet, just support it. Then go into the loft and clean any grot away and any loose knibs. Then:
So that it pentrates into the gap between plaster and laths and broken knib joints. Then depending on how much chance there is of getting plaster into the ceiling/lath gap, add the fairly soft plaster, working it into the gap. Then jack the ceiling up. Hopefully to make new knibs or at least fully filling (where you can) the ceiling/lath gap.
Yup fair point - it does depend on how much it is sagging...
Video it so we can watch it & smile.
I've fixed fist-sized holes with a slodge of plaster on piece of shiny cardboard pressed into the ceiling and propped in place while it sets.
A hole your size I've done by carefully trimming the hole back to the joists and screwing a carefully cut piece of plasterboard and skimming over.
And then there's the "panel it and make it look like a feature" method:
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