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Plastering & Rendering

safe/successful way to smooth indoor masonry paint?

Anonymous user 01/03/2024 - 3.01 PM

Hello, we bought our first house a year ago and are trying to reset it. One bedroom (slope roofed) has been half painted, and was half wallpapered. I've removed the wallpaper due to mould & damp where the old fireplace is. Under the wallpaper is the old plaster with lots of old crumbly wallpaper paste, not a problem, we are now adept at removing it (120 years worth I believe!) The problem is that the previous owners used (I think) masonry paint on half the room, including sloping roof, which cuts you if you bump against it. i've sanded a small patch and it looks like little balls of something (silica sand?). I'd love to smooth the walls. I'm afraid of a.asbestos (the roof is artex) and silica sand or some other toxin . The paint has a sheen to it, a colour I think they have painted over the textured paint. Could be oil based, or could be eggshell? I suppose I am asking: a) is it safe to sand off toxin wise b) is it safe to sand off damp/plaster wise (perhaps they used this combination due to damp conditions, or perhaps were just not willing to scrape off old paste, or plaster is in badly patched condition) c) would it work for me to skim coat on top of the textured paint? is that the best fix in either case? Sorry for the excess info, just felt like it was necessary to set the scene between damp, paint and what lies beneath. Many thanks for your answers!

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4 Answers

TDS Building Services

Rating: 2 out of 5
Maida Hill, London
Know all the anomalies’s off wall’ Unibond. Tight coat of bonding-re-skim.
Answered12 April 2023
5

Anonymous user

Firstly address the damp issue ie where old fire place is as probably a fault at the chimney end. Once this is sorted then remove only loose then seal with PVA or singular and 2 cost plaster - If the pattern or coating is thick then a different plastering procedure will be needed. A good experienced plasterer should know this method.
Answered12 April 2023
1

Euan Carnelley

Rating: 5 out of 5
South Petherton
Any damaged and damp plaster/plasterboards that's there after removing the wallpaper I'd remove that and re place it with new plasterboard or another form of finishing plaster system. Before sanding or scraping any artex or any other textured like finish you should find out what year it was applied/build. As asbestos in building materials was banned in 1999. So if applied before that time I would just assume it has asbestos in it and get it tested to be sure. Then look at your options after the results. Either get it removed professionally or finding a system that can go over the top without disturbing it, IE overboard, form of primer and bonding and skimming.
Answered12 April 2023
1

Anonymous user

Personally I wouldn’t sand it I would pva bond it then when fully dry pva again and then skim, if not over board it all
Answered15 April 2023
1