I have blown plaster on 3 walls in the kitchen. No visible signs of damp or water leak/ingress. Do i call a builder or a plumber?
If blown plaster call as plasterer as he should be able to see if it just aged or any other issue with the walls
P.v.a the area and covers with hardwall an give it some time to dry then plaster it
Neither call a plaster blown walls with no sign of a leak. Most likely the plaster is tesly old or whoever plastered it didnt pva the wall before applying the fresh plaster
If there’s no leak or damp that’s affected the area, this could be as simple as hacking away the loose excising plaster and re plastering.