Any ideas what's causing these bumps?

Chalkman

17179416595547609702587652349857.jpg

17179416777525054493296553174636.jpg

Ground floor room. No discernible smell or appearance of damp. Bumps are hard to touch. Kids have started to pick it hence the white chips 😔

Wall was previously perfect with no issues?

bfclancy2

damp

Mr321

Could be a leak causing that. Something like a water pipe even. Do more investigation above as to what runs where

10-10-20

Yes, it's the salts in the wall coming to the surface by the movement of water and evaporation, leaving a white salt crust under the paint. A leaky gutter or such will cause that as Mr321 says.

Chalkman

Thanks guys for that. I'm a bit stumped on it still though.. It's a ground floor room and overhead rooms have no issues. It's on an interior partition wall also. Pipework for water etc not routed through this part of the house.

zg3409

How old is house? Are floors wood or concrete? You may have no damp proof course.

10-10-20

https://www.boards.ie/discussion/comment/122241142#Comment_122241142

And was that wall an old chimney by any chance? Is it properly capped off if so?

standardg60

What's on the other side of the wall? Is it a block partition or timber stud?