Hi,

there is some serious wall blisters on the wall though the surface does not feel damp. No painting has been done for the last 20years. 

Can I ask for some expert advice on how serious is this issue and cost of rectifying it?

 

thanks

Edited September 4, 20215 yr by peachpeach

Looks like water seepage causing the paint to “pop”. Is the other side of the wall a toilet shower or external wall? 
if toilet shower then need to redo water proofing. 
if external wall then need to see if there’s cracks on the plaster and fix it. Maybe need to do a layer of waterproofing sealing paint as well

The blisters need to be scrapped off and then whole wall should be painted with sealer first then finishing paint

Edited September 4, 20215 yr by snoozee

That wall is adjoining with the neighbour wall. It likely could be their toilet. If it’s water seepage, so likely a paint job can settle ? Was just worried it was something more serious.

2 hours ago, peachpeach said:

That wall is adjoining with the neighbour wall. It likely could be their toilet. If it’s water seepage, so likely a paint job can settle ? Was just worried it was something more serious.

Is you and/or your neighbour’s house rebuilt previously?

is the roof directly above this room or is there another storey? If roof is directly above, it could be leakage from the roof or flashing between you and your neighbour’s roof which caused this. During the heavy rain over the last 2 weeks did you managed to feel to wall to see if it is wet?

You can always repaint the wall but if there is really a leak and isn’t fixed then the problem will still remain

The left neighbour did a rebuilt but this problematic wall is adjoining to the right neighbour. There is another attic above this room. Other rooms are fine

You may want to get your contractor to check on the roof flashings to see if they are ok.

else just scrap away the damaged paint and then repaint with new sealer and paint. Then monitor again to see if the problem comes back