www.ultimatehandyman.co.uk

Hi everyone,

I moved into an old 1900s property recently and I DIY repainted the walls about 3 months ago. Most of the painting was directly onto the old paint and other parts on the old plaster directly where the old paint peeled off or sanded off.

Today I am seeing bubbling in a few parts of the wall. You can also see the newly painted part breaking in places. One part I thought could be fixed by applying a layer of white filler then white primer and then paint - I left this for a while before painting and as you can see it has started to bubble up again.

What is causing this? is this damp?
How can I fix this?

Thanks

Going over old work of unknown origin is risky at best.

You'll need to scrape as many of these flaking areas back to a sound clean edge as you can. If a lot comes off, all the less to cause issues down the line.

If you can still get Zinsser Peelstop (I think it may be getting discontinued) then coat the scraped areas and let dry, before over-painting. Some filling and fettling may be needed after the Peelstop though.

Don't be surprised if a lot of old paint scrapes away. It sounds like its not properly bonded to the underlying surface.