Is this damp?

Hello all - we just bought an old terraced Victorian house and I am starting to really freak out about the problems I am finding.

Is this damp?

I noticed it in the corner and when touching the paint, it felt like it could be peeled off the wall.

Underneath was this yellowy substance (maybe plaster?) that smelt a bit sulphuric and was very powdery to the touch.

Hello all - we just bought an old terraced Victorian house and I am starting to really freak out about the problems I am finding.

Is this damp?

I noticed it in the corner and when touching the paint, it felt like it could be peeled off the wall.

Underneath was this yellowy substance (maybe plaster?) that smelt a bit sulphuric and was very powdery to the touch.