Plastering help question 2

[Franks Wild Years]

Any plasterers out there able to help with what I can only describe as wall dandruff ? The paint bubbles then flakes off leaving the plaster exposed. The plaster is bone dry and really dusty. Its happening in patches in my kitchen, and I don't know what to do about it.
Here's a picture. Any help greatfuly received.

 

[tedebear]

dry rot

 

[Franks Wild Years]

dry rot

really ? thought you only got that in wood. When I say you, I don't mean,you..

 

[tedebear]

Well not really but its rot of sorts, dry rot refers to the stuff that crumbles timber, but still the same its a similar fungus....plaster rot if you will...

 

[tedebear]

like the plaster has water in it but the paint won't let it dry out...

 

[Taybha]

call a exorcist your walls are bleeding!

 

[skipper734]

Damp. Is there a waste pipe down the wall on the other side?

 

[Franks Wild Years]

Damp. Is there a waste pipe down the wall on the other side?

No, and its random patches. If it was damp I'd expect the plaster to feel damp but its bone dry and dusty.

 

[skipper734]

My money is still on damp. If there isn't a pipe outside maybe the air gap has been bridged in places. does it go down to the floor? There's moisture in the plaster, which is dissolving the salts in it and blowing the paint off.

 

[Questions]

Being in the trade I think I may be able to help you.....................







Your walls are f***ed.

 

[Chicken Runner61]

Is it on an old chimney breast?

 

[Franks Wild Years]

Is it on an old chimney breast?

The bit in the photo is, yes.

 

[raymondbriggs]

put wallpaper up and forget it,with luck you will have sold up and moved before it becomes terminal.

 

[Lady Bracknell]

It looks like the result of damp to me 'cos that plaster is well and truly blown. Damp has an unhelpful habit of not necessarily feeling damp at the point where the visual damage occurs and I'm wondering whether, if this is on a chimney breast, whether water is getting in at roof level. You don't need much to cause problems, just a steady seepage!

 

[Franks Wild Years]

Hmm, so it looks like hacking it off, sealing it and starting again then ?

 

[Uncle C]

Moisture transmitting itself from inside a chimney can carry soot and salt residues to the surface. This causes efflorescence which can mess up any plaster work.

The chimneys need to be capped. A ridge tile will cover it but be sure not to seal it completely. It is then best to put a hit and miss ventilator low in the chimney breast to allow it to dry out over time.

Finally the plaster work is now polluted with the efflorescence and will remain 'live' to condensation etc from the room. It needs to be hacked off and re-plastered. You could seal the wall with black pitch before plastering for a belt and braces job.

 

[Franks Wild Years]

Thanks for all the advice, looks like I'll be up on my roof today. At least the suns shinning.

 

[Uncle C]

Thanks for all the advice, looks like I'll be up on my roof today. At least the suns shinning.

Take care - think of Emu

 

[dylan_bha]

We had something similar in our portch, I asked the decorators who were doing our lounge following a leak (insruance job) and they said to undercoat with an oil based paint. I got some specialist stuff from B&Q, it's quite expensive (about £11 per litre) so I only treated the actual flakey areas (after preparation). Anyway it seems to have worked a treat!