Most youtube videos show plaster being applied in 2 coats,
with a second skim coat when its half dry.
Can the second skim coat be applied a few days later ?
I've a big ceiling to do tomorrow and might get tired and clumsy after lifting up the first coat.
I've tended to do the one coat.
You should use the same amount of plaster overall whether one coat or
two. 2 x 1.5mm vs 1 x 3mm.
The first coat is more to cover and the second applied after it has gone
stiff but before it had hardened. The first need not be polished, unlike
the second coat.
When I've had to do this I've always left the first coat with a
thoroughly keyed surface by scoring the surface after it has started to
go hard. Before the second coat paint with PVA, leave for a short while
for it to start getting to the really sticky state, and then applying a
second coat of plaster. If the PVA has dried out before you get to start
plastering apply another coat.
With a friend we did 2 plaster coats in 9 hours,
the ceiling about 5 meters by 5 meters
(8 sawn off plasterboards)
3 and a half bags of multifinish,
I'm a bit too tired to try and dampen it and polish it tonight,
I would probably do more damage than good,
so will sand and fill it in a few days.
Thanks for the advice and encouragement,
I now know how much plastering I can do in a day,
roughly 2 hours per 4x8 plasterboard,
a bit longer with final polishing
(which would save time from sanding and patching!)
On Friday, November 16, 2018 at 9:14:55 PM UTC, George Miles wrote:
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