Cracks in walls...blown plaster?

[thomasbrig]

Hi all,

Im looking for a bit of advice on my kitchen walls. I moved in last year and stripped off a load of old wallpaper and the walls weren't in a good shape. I used polyfilla / toupret and some joint compound to fill and smooth over holes, uneven areas, build up a few places etc. Then put a coat of Gardz on, then two coats of paint.

Now 5 months later I'm seeing these areas which sound hollow/loose when tapped. Thinking of chipping everything back then putting some PVA on (which I didn't do first time around), then patch plastering it. Then back on with some some sort of primer, then paint again?

Does that all sound about right?

Thanks for any advice you might be able to provide!

 

[Wayners]

Do you have a cavity wall?.
How old is property?

Like a fork in the road. If cracks have that look then it's probably blown off bricks

 

[thomasbrig]

Cheers Wayners! It's a 1920s house, but not a cavity wall...the 'hollowness' feels like its the top layer...other parts of the wall seem ok from what I can tell

 

[Wayners]

Lime plaster and breathable emulsion so the damp don't get trapped.

Maybe look at limelite plaster and non vinyl emulsion

 

[thomasbrig]

Oh interesting, thus is because it might be damp thats causing it? So you'd advise taking it back to brick > limelite > finishing coat? Any PVA needed before the limelite? Thanks again

 

[thomasbrig]

If it helps, this is where an old chimney breast was / is

 

[Wayners]

Any air flow through old chimney? Or no opening now.

No PVA as it's a sealer. Don't want any sealers on wall or bricks.

 

[thomasbrig]

No opening now, no. Cheers on the PVA tip.

Saw somewhere else that thistle one coat could also work for this?

I used a Dulux kitchen paint trade (eggshell) which sounds like it should be breathable

Cheers!