Plaster problem

[America119]

I had a couple of rooms plastered last November time. In January I sealed the plaster with watered down Wickes matt white paint. No problems showed through the paint. When I put a second coat on of Wickes matt Magnola paint two weeks ago there was rough patches on the walls with dimples/small pin holes showing in the wall. I have tried using a different roller and paint from a specialised paint shop, I have tried sanding down the rough patches, but none of this has worked. I tried to do the same thing in another room and the rough patches/small pin holes showed up again. I am at my wits end now. Any suggestions please on what the problem is?

 

[stevethespreader]

I had a couple of rooms plastered last November time. In January I sealed the plaster with watered down Wickes matt white paint. No problems showed through the paint. When I put a second coat on of Wickes matt Magnola paint two weeks ago there was rough patches on the walls with dimples/small pin holes showing in the wall. I have tried using a different roller and paint from a specialised paint shop, I have tried sanding down the rough patches, but none of this has worked. I tried to do the same thing in another room and the rough patches/small pin holes showed up again. I am at my wits end now. Any suggestions please on what the problem is?

ay chance of some pics? i must say that i used wickes paint in my kids bedroom its awfull stuff, its supposed to be wipable but when i wipe it with a cloth, the paint comes off the wall, i even noticed the painters in the decorating forum was having similar probs with it
ps look at joe 90s post as well //www.diynot.com/forums/viewtopic.php?t=248489

 

[waterl00]

hi there - I'm currently experiencing exactly the same problem. Did you find a resolution or a cause?

1) I had ceiling skimmed and applied waterered down Wickes matt with 2 coats to seal.

2) Then applied one coat of undiluted matt and there were what I thought were roller marks everywhere, so I put on another coat - still there. On closer inspection I found there were deep dimples in the paint and the areas I thought were roller marks, were infact these rough areas of dimples.

3) Had ceiling reskimmed as the roller mark effect annoyed me soooo much. This time applied Wickes plaster paint........same problem.

I've applied the paint evenly withou over or underloading the roller. Is there anyway I can smooth out the dimples? Though about using polyfiller paint? Tried to sand first time around - impossible.

Any help gratefully received.

 

[jrplastering]

its a bit of a sod to do but it might be worth buying some powderd easyfill not pre mixed stuff (its rubbish) and a caulk board and spread it really thin over the effectd areas sand it back till its pukka and flat then paint with a different brand a decorator i know swears buy dulux super matt seen his work on my new plaster and it comes out imaculate

 

[stevethespreader]

as jr says try a different paint and i think your troubles will go away, wickes paint is naff.
"EdIT" was the ceiling skimmed pimple pattern artex?

 

[waterl00]

JR / Steve - thanks for the reply guys - really appreciate it.

I've decided to get the plasterer back and skim the ceiling a 3rd time!!! This is getting really expensive.

I've been trawling through forums and others have seemed to have the same issue with Wickes paint and suggested the Dulux Super Matt. I'm sure I've been getting these problems as the paint is drying too fast - seems to be referred to as the 'orange peel effect'.

In terms of applying a mist coast using the Dulux super matt - does anyone know how much I should water this down? Suggestions range anything between adding 10 to 70% water. I definately don't want to make any mistakes again and want to go cautiously - but other than having to apply more coats - is there any fundamental problems with watering down paint too much?

Again, any comments would be gratefully received - I can't face getting this wrong again.

Steve - the ceiling was smooth beforehand and didn't have any any pattern / artex on it. I'm converting a garage so it was just plasterboard coated in what must have been silk paint as it had a sheen to it. Each time the plasterer has skimmed - he's PVA's first.

Cheers

 

[jrplastering]

the weight of 6 coats of skim on top of plasterboard with silk paint that wads only pvad might be a bit much thats why i suggested to use filler and caulk board to smooth off.
just be aware of this when you think your doin it for "the final time"

 

[jrplastering]

sorry i forgot to say the reason it might be too much weight is that plaster and pva will struggle to get a proper bond on silk paints shiney surface, i would imagin all the plaster coats wil be nicley bonded together but the original coat onto the silk will be struggling to get a grip

 

[misterhelpful]

In terms of applying a mist coast using the Dulux super matt - does anyone know how much I should water this down?

You can water Supermatt down 3 parts paint: 1 part water for mist coating. It is ideal for sealing bare plaster, even when still drying (I prefer to wait for it to dry though) and gives a nice even finish.
http://www.icipaints.co.uk/products/info/dulux_trade_supermatt.jsp

I avoid Wickes trade paints like the plague as they always cause problems. Their Master range is not too bad though. (I'm a dec BTW)

 

[stevethespreader]

does anyone know how much I should water this down? Cheers

water it down 50-50,all the painters i know do this and i do as well, give it 2 mists coats if you like , a painter i know gives it 50-50 then uses easyfill to snag any blemishes then another 50-50 then the colour coat , but believe it or not on my last job the painters were on price , they started to do the ceilings we had plastered and i said are u going to give the walls 50-50 b4 the colour? and he said no im going stright on with the colour which shocked me a bit

 

[waterl00]

Again, thanks for all your feedback guys.

Well, the 3rd coat of plaster is on the ceiling which I'm going to leave until the weekend to dry out. This is the 3rd skim, so I'm hoping that it won't be too heavy for the grab between what was on the initial plasterboard and pva. I did raise this concern with the platerer and he seemed to think it would be ok - so fingers crossed.

I do think I have got to the bottom of the organge peel effect I've experienced when painting the last 2 skims. Rather embarassing, but I wasn't aware of the difference between Trade and Retail paint. I just assumed 'Trade' was just part of the paint's name when I picked the massive tubs up from Wickes. I didn't realise Trade is much more concentrated than Retail paint so no wonder it was such hard work to put up and no wonder there were dimples / roller marks everywhere!!! I'd have to constantly load up the roller and by the time I'd finished the area to be painted and go onto the next patch it had nearly dried so I'd go over it again - putting on far too much, thick paint.

I did buy some Supermatt yesterday, but being 'Trade' it's probably going to be the same thick consistency? I don't wan't to take any more risks or mess about watering it down, therefore, I think I'm going to take it back, get a bog standard retail Crown matt brilliant white and follow the advice of two 50/50 mist coats and 2 top coats. (Unless anyone can tell me if there is a Retail version of Supermatt?)

Thanks for all your help, this has been a very, very expensive lesson and will let you know how it goes. I just hope the ceiling holds up - bit worried about that now!!!!!

Hopefully a few people may learn from my mistake.

 

[1john]

Leave it as long as you can to dry out, although it may appear dry there will still be residual moisture behind that needs to dry too. I would think at least 7 days.

 

[waterl00]

ok, will make sure I leave a week - but I thought aslong as I used normal matt (not vinyl) it would be ok as the plaster could still breathe?

Also, when putting on the 2 mist coats, should I literally apply these one after the other or should I leave each coat to dry first?

Sorry for the questions - I just want to make sure I don't mess this up again as it's taken so much time and money!!!!!!!!!!!!!

 

[Alastairreid]

I normally do 1 mist coat let it dry then 2 of the coloured...never no probs.

 

[Richard C]

I would leave it at least 10 days; youve already had 2 disasters, what's your hurry

Also, when putting on the 2 mist coats, should I literally apply these one after the other or should I leave each coat to dry first?

I'm the one that does/recommends that, I firmly believe it helps paint adhesion If lazy brastards apply it neat straight onto the plaster, it may go on & look OK initially but will probably start peeling & flaking after a couple of years & if you stick wallpaper of it, subsequently removing the paper will bring the paint off in sheets.

I use ordinary cheap own brand matt white thinned 25-30%. Leave to dry overnight & then apply your chosen finish. 50% is rather on the thin side IMO but you’ve got several different opinions here, take your pick.

I also thin all emulsion around 5% before use as well, I rarely use rollers as I prefer a 4/5” brush, paint goes on easier, less messy & gives a better finish IMO.