following the removal of some woodchip i have revealed a 1" wide by 10" long
full depth break in the old 100yr+ plaster.
it goes back to the brickwork. either side seems solid so i am wanting to
just fill and sand it to make good.
what is best method to repair it. ultimately it will be papered over.
Firstly, I assume the brickwork behind is dry. If it isn't,
post again and we can discuss some other options.
If you are not familiar with using plaster, then polyfilla
is probably the easiest to use. If the existing plaster is
crumbly or easily sheds particles from the exposed edge (i.e.
lime plaster), I would start by painting the edge with plenty
of diluted PVA (1 part PVA to 5 parts water) which will soak
in and stabalise the exposed edge, and also help prevent it
coming away from the brickwork. Then mix up polyfilla and
put it in the hole. Given the large area of the hole, I would
do this in at least 2 goes, the first still leaving the
polyfilla surface 2-5mm below the plaster surface, and when
this has set, do a second thinner coat which is much easier
to finish off level with the plaster, without slumping, and
without the need for any sanding afterwards.
brickwork is dry. i think PVA wash is the first step as the old edges are a
have used polyfilla before but i always got that slumping. guess i tried to
fill too much at once.
thanks for tips.
yeah sounds good.... i used watered down pva to seal and then pre-mixed
bonding plaster from Wickes to fill gaps in 100+ year old 'horsehair
plaster'. I then finised off with a fine ultra lightweight filler... results
were excellent after a few rub downs.
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