Plastering/Decorating query!

mishima

mishima

mishima

Soldato
Joined
10 Dec 2006
Posts
4,715
Hi there,

Wondering if there are any plasterers or decorators out there that can help out. I've plastered this wall on the 24th November. I have been waiting for it to dry so that I can get on and decorate.

Does this wall look dry enough to paint?

Need your opinions and expert advise :)

Thanks

plaster.jpg
 
How many layers? How thick?

Stick some masking tape to it, if it grips it's usually good to go.
 
It was only very thin the plaster. I've wacked on some PVA bonding and let that dry. I've just applied a thin coat of undercoat paint. Going to see how it turns out! It's annoying having to wait so long!
 
Ive always left it about 5 days to dry out properly.

Once its painted its essentially sealed, so moisture would be locked in. Best to let it dry best you can.
 
I've just had my bathroom replastered and it took a good couple of days to dry out,then i sealed it with pva so it wouldn't soak up any more moisture,i tiled but i'm sure the pva would prevent it from soaking up the paint.
 
homi-sid-al said:
I've just had my bathroom replastered and it took a good couple of days to dry out,then i sealed it with pva so it wouldn't soak up any more moisture,i tiled but i'm sure the pva would prevent it from soaking up the paint.
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All aboard the failboat. Sealing plaster with PVA is one thing you shouldn't do - yes it stops it soaking up moisture but paint doesn't stick to it properly so it will eventually peel off or come off if you use anything adhesive on it.
 
I was told by a plasterer to PVA the old surface with a strong mix but not to PVA the finished wall.

I'd say that looks about dry enough to be painted, bare plaster tends to "drink" paint so I'd give it a white emulsion coat first. Finish looks okay for an amateur, plastering is not as easy as it looks. I can get a decent shine but struggle to get it uniformly flat and it takes me ages compared to a pro.
 
Lopéz said:
I was told by a plasterer to PVA the old surface with a strong mix but not to PVA the finished wall.
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Theres a huge debate about the use of PVA on plastered surfaces - some say use it others say don't. The consesus seems to be that it is fine in the short term (and a time saver) but likely to cause problems in the long term.
 
When I moved back home I ended up in a room that my older brother had painted for my mum. He'd plastered the paint straight onto bare plastered walls. It started to peel. And not in little flakes, I could tear huge strips off the wall like it was wallpaper. So the whole room had to be redone (stripping paint off the wall with a wallpaper jobby and no resistance is a very easy job to do). Next door neighbour told us to make a 50/50 mix of undercoat and water, stir it up well and give it a coat or two of that then put on the undiluted top coat. So far no peeling (after a couple months).
 
I would leave it at least a week, just to be sure. If you paint it whilst wet the paint will peal off. And you don't want the hassle of that.

And if you turn the heating on to dry it out quickly the plaster could crack.

I would always go on the safe side. Also as others have said, seal it. We've always used pva, but it's probably an outdated technique these days.
 
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Atrox Moris said:
When I moved back home I ended up in a room that my older brother had painted for my mum. He'd plastered the paint straight onto bare plastered walls. It started to peel. And not in little flakes, I could tear huge strips off the wall like it was wallpaper. So the whole room had to be redone (stripping paint off the wall with a wallpaper jobby and no resistance is a very easy job to do). Next door neighbour told us to make a 50/50 mix of undercoat and water, stir it up well and give it a coat or two of that then put on the undiluted top coat. So far no peeling (after a couple months).
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This is the correct (time consuming) way to do it.

The plaster sucks the moisture out of the paint which is why it flakes off, by putting the mist coat (water/paint mix) on you avoid this problem. Usually you would do a 50/50 coat then a 25/75 coat before applying the paint neat.
 
Simple answer is NO , the dark bits are not dry or your mix was wrong , stick the heating on for a few days to make sure its dry . I would never seal with pva on the new plaster just on the underside . Do the mix that MOT said or you will waste good paint aswell
 
You can paint on it straight away with "Dulux Trade Supermatt" (one or two mist coats first then a full coat), which they sell at B&Q.

Edit: I see you have already left it a week so yes it should be fine to paint now. Seal it with a mist coat or two of emulsion first then you are good to go.
 
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M0T said:
All aboard the failboat. Sealing plaster with PVA is one thing you shouldn't do - yes it stops it soaking up moisture but paint doesn't stick to it properly so it will eventually peel off or come off if you use anything adhesive on it.
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OK don't PVA lol....my tiles aint gonna drop off are they?:eek:
 
homi-sid-al said:
OK don't PVA lol....my tiles aint gonna drop off are they?:eek:
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They would drop off if you didnt PVA as tiling straight onto a new plastered finish is a bad idea also.

The amount of bathrooms we have stripped out, those that were tiled onto new plaster , the tiles simply fell off in sheets. It was only the grout holding them up
 
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