what to do with new plaster

Boba_Fett

Hi all

i have recently had my upstairs plastered, what would you recommend i do, can it be painted straight onto or does it need some form of basecoat, what would you recommend??

thanks in advance

Happy-Days_3

You need to apply mist coats initially, i think maybe 2.

Get some Super Matt, then you water it down (can't remember %, but says on tub).

Paint that on. Let it dry. Second mist coat. Then off you go and build up whatever paint you want after that.

The reason you do the above is because first coat or 2, new plaster will suck all the moisture out of the paint. So first coat or 2 need to be very wattery. Otherwise, water gets sucked out and paint flakes off.

Also, you must wait for it to be completely dry before painting.....

keystone

If it was taken right back to brick or blockwork then you do nothing for a minimum of 6 weeks at this time of year to let it dry out properly. Then proceed as for skim.

If it was just skimmed then leave it for minimum of 48 hours at this time of year. Then you must apply a "mist coat" of watered down emulsion to seal the surface. The degree to which you water it down depends on the thickness of the paint you are using. If you are using sheds own brand thin as p....s stuff then it has so much water in it already then you don't need to thin it further.

If you are using a trade quality emsulsion then probably 20 - 30% . Then you apply your finish coat thinned by about 10% then a second coat of finish neat.

Under no circumstances should you PVA the plaster before painting.

Cheers

Leif

I've followed the procedure described above, and still had small areas that peel, or bubble when wet. I suspect the cause was highly polished plaster, and in that case I'd be tempted to roughen it with coarse sandpaper.

Hintza

Leif wrote: »

I've followed the procedure described above, and still had small areas that peel, or bubble when wet. I suspect the cause was highly polished plaster, and in that case I'd be tempted to roughen it with coarse sandpaper.

I have this in our new bathroom right above the shower. So be doubly careful in bathrooms.

phill99

Hintza wrote: »

I have this in our new bathroom right above the shower. So be doubly careful in bathrooms.

That's because it wasn't mist coated.

jetblack61

We've just this very weekend painted our lounge diner having had it plastered at the start of August.

We were advised by our plasterer to use a 50/50 emulsion/water mix for the coat to seal the plaster, then proceed with standard emulsion as normal.

kjp1949

had room replastered after new damp proof course. Waited until plaster was dry (over 2 weeks). Painted with watered down Dulux Matt as per tin and Dulux decorator centre advice. Further painted with 2 coats of Dulux Matt. However the colour has dried lighter over the new plaster than rest of wall. What should I do now? More paint? Wait? Try using stain stop?