Another damp puzzle. Can anyone help solve mystery of intermittent damp on dining room walls.
1930 house, original bitumen damp course in walls and concrete floor slab with parquet laid in bitumen on the floor.
Last few days I sealed myself in the room with sander and set about the floor. 8 hrs later the room is steamed up with all my heavy breathing. No surprises there.
Damp patches appeared above the skirting in blotchy patches. Not a consistent pattern, but on both internal and external walls. Once the room was ventilated the patches started to recede. I'm puzzled why the humidity affected the walls in inconsistent patches? Why just those areas? The walls are original plaster with one layer of paper.
I'm considering painting those areas with a damp seal paint before decorating. Would appreciate your thoughts as don't want to just move the issue somewhere else.
Thanks for your help folks.
1930 house, original bitumen damp course in walls and concrete floor slab with parquet laid in bitumen on the floor.
Last few days I sealed myself in the room with sander and set about the floor. 8 hrs later the room is steamed up with all my heavy breathing. No surprises there.
Damp patches appeared above the skirting in blotchy patches. Not a consistent pattern, but on both internal and external walls. Once the room was ventilated the patches started to recede. I'm puzzled why the humidity affected the walls in inconsistent patches? Why just those areas? The walls are original plaster with one layer of paper.
I'm considering painting those areas with a damp seal paint before decorating. Would appreciate your thoughts as don't want to just move the issue somewhere else.
Thanks for your help folks.