Due to some water hitting the outside wall from the guttering last year, it
has caused the wall paper above the windows inside. And the plaster below
the wallpaper is very sandy and crumbly.
See picture placed on tinypic photo hosting website:
Could someone advise a complete novice on the best course of action please.
My immediate reaction is to go to somewhere like B & Q and get some repair
plaster. However the existing plaster is so very sandy and crumbly and so
I'm not sure whether to knock it all off, or whether i can paint it with
something that would 'solidify' it? (I've never done any plastering before
but have heard that it's not that easy).
Then I thought I would put some Polycell surface filler down before putting
emuslsion paint on top of that.
Grateful for any advice simply explained for a novice about the best way to
deal with this problem please. Thanks.
You could try knocking off the worst of it and skimming with filler,
which is more likely to bond to a bad surface than plaster, and is much
easier to use. If you leave what looks like a right angled corner
intact, a plasterer's trowel will have something to follow. Easier to do
than explain how :-)
Stuart thanks. Is there any particular filler you would recommend? The bit
of plaster I did knock off fell off right up to the brick work, so i'm
guessing I might need quite a bit? Thanks.
I'd soak it in dilute pva (something like 1 part pva, 5 parts water) -
that'll stop the dusty/sandy crap. Then a proper filler - I like the
polyfilla trade stuff from screwfix personally
but most will do. That'll get pricey if the area is large - you might want
to look at one of the onecoat plasters (onecoat can go on thicker).
You can probably even get premixed vats of the stuff from wickes etc.
I've had excellent results skimming stuff with Gyproc Easi-fill. If you
aren't any good at plastering then it's much easier to use - not sure what
the max thickness is though (if it's good enough for you, I'd recommend it).
Excellent stuff - and sandable if you do balls it up unlike proper plaster :)
It is possible to glue plaster together, but its only worth doing if
it avoids striping and replastering. Once its deformed like that I'd
knock it off.
Glue plaster together? I think they do that in the cartoons. LOL
In days of yore plaster was not as it is today. The "crumbly"
appearance may well be OK. So long as it is still stuck to the wall.
If it sounds hollow when you tap it, it will have to come off. It has
"blown". Probably a lot more than you expect will fall away too. You
may end up doing the entire wall.
The wall can then be cement rendered and finished with plaster.
If it is not hollow, you can soak it with PVA "bonding agent" (there
is a special grade for this) several coats starting diluted and later
ones less diluted.
It can then be refinished. I f you've never applies plaster it's best
to get some "Polyfilla" or similar. Doesn't go off as quick, much
easier to deal with.
What about using plasterboard - dab and dobbed onto the brickwork?
crumbling lime plaster isnt much good. It needs to be glued or lime
watered as a minimum, otherwise it keeps crumbling off.
This is often said, but not true. If its hollow and thin or breaking
up, then it'll break up readily and needs removing, but thick firm
hollow sounding plaster in good condition is fine.
sometimes yes, sometimes its just a patch that isnt bonded to the wall
under it, and if the stuff's good & firm & not moving that's not a
don't cement render historic brickwork
any grade will work. I'd only give it one go, once its set it doesnt
allow more to soak through so easily. Brush on, let soak in for 10
mins, brush more on, etc, but dont bother coming back another day to
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