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Plastering & Rendering

Painting over fresh plaster - how to stop fresh plaster peeling when using a roller

Anonymous user 14/03/2024 - 2.33 PM

I've been told that a light mist coat of watered down emulsion is all I need to prime a patch of fresh plaster for decorating. I gave the newly pastered wall a sand until smooth, and then two coats of the watery emulsion. I then left the wall to dry over night and came back to it this morning, hoping to paint over it in a thicker, final layer of emulsion. But on certain patches of the wall my roller will still break and lift large chunks of the fresh plaster leaving horrible gaps and smirring the broken bits around the area. I've looked into buying some plaster sealer but the reviews all tell me that it's no better than using the mist coat of emulsion and water. Basically a waste of money. Can anyone tell me where I'm going wrong or give any tips on how to stop the fresh plaster peeling under a roller? It would be much appreciated. Cheers.

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15 Answers

Anonymous user

Hi Most likely ur skimming is done over a smooth surface (old skim) without using any premier or PVA at least , best if u don't roll more than once on the same spot! hope this helps

Answered4 September 2014

Anonymous user

sounds to me like you didnt prime the wall before plastering , a watered down coat of unibond should be applyed to wall and not left to dry whist plastering,thats why it is peeling off

Answered4 September 2014

Elements Plastering Solutions

Rating: 5 out of 5

Brackley

Hi, I've got to agree with the other comments, it sounds like to me the plasterer hasn't sealed the wall correctly if any, before he skimmed it. My advise would be to rip it off and start again, filling the wholes or patching it might be a quick fix but long time it could cause you bigger problems. Get someone who knows what there doing. Hope this helps Grant

Answered15 September 2016

M. Deco

No reviews yet

Birmingham

You should have pva the area before plastering. If it was a hight suction back ground two pva coats the first to dry then the second to become sticky to touch then plaster.

Answered29 October 2016

CB Plastering

Rating: 5 out of 5

Liverpool

Just water pva down and cover new plaster when dry paint it

Answered18 January 2017

Stuart Chadwick plastering

Rating: 5 out of 5

Llanelli

When skimming over old walls all loose paint,skim etc should be removed. I then apply NEAT pva and re-skim never had a problem... Bear in mind the skimming is only as sound as the surface you're going over....👍

Answered27 July 2018

Top-Notch Plastering & Rendering

Rating: 5 out of 5

Southend On Sea

A 1/4 ratio of pva glue to water (highly recommend uni-bond) must be applied to seal the surface should sort this issue 100%

Answered31 March 2016

Anonymous user

50/50 mix the paint with water

Answered12 January 2017

House to Home Renovations

Rating: 5 out of 5

Llanelli

I think you should have the plaster back to ask if he did pva the walls and if not you could be looking at hollow walls before long if he did use pva and can guarantee the work then at least you can go ahead and use pva on his plaster before you paint I don't know of any other issues that could effect the paint to do that even cheaper paint would not peal like that Hope you can rectify the problem and good luck

Answered19 February 2017

Anonymous user

If the plaster is peeling off while you paint it I would call the plasterer back as it sounds like the previous surface has not been sealed or sealed properly with pva or unibond etc before he's plastered it, the bits that are peeling must be weak spots but I'd be worried that the whole lot could end up detaching itself before long, also you said you sanded before paint, did you make sure you brushed all the dust off before you applied the paint? Hope you get it sorted

Answered25 August 2017

Max sandford & son

Rating: 4.5 out of 5

Carmarthen

Hi you should remove all loose plaster clean of dust and loose materials then either blue grit or PVA glue leave dry and then re-plaster over it

Answered27 December 2018

Anonymous user

I would call the plasterer back to rectify his work as that’s defective. Pva or blue grit should always be applied to areas of high suction prior to plastering the surface

Answered5 January 2019

Anonymous user

Hi There, My advise would be, is to rip it off and start again! It sounds as though the plasterer used hasn't sealed the wall correctly before skimming. As others in this feed have said, filling the wholes or patching maybe quick fix now. But long term it could cause you bigger problems. In answer to your question regarding emulsion and water, a 50/50 mix is the perfect solution to use on correctly skimmed (dry) walls.

Answered13 January 2020

SJL Plasterering & Building

Rating: 4.5 out of 5

Southminster

You need to have the wall treated first with either a water down pva or a sbr or with British Gypsum wall Adhesive mixture other you will keep having the same problem and if you do manage to paint it. It will only crack and the plaster “skim coat” will probably fall off given time Not an ideal situation to be in

Answered9 February 2020

Anonymous user

Pva before plastering You should Make sure there's no dust after sanding wall. Mistcoat 50/50 water to paint ratio

Answered11 May 2021