Hi. I recently had a rewire, and where they have chased and replastered, the area looks damp. But JUST where the new plaster is. Moisturise Meter reads 18. This is an interior wall. I'm ready to redecorate but worried that the damp needs attention 1st. This particular wall had previously been damp proofed. It's a brick wall, old Victorian town house.
Any advice would be welcome.
Thanks.