My house is very damp (old commercial property, no damp proofing and half of it underground). I keep on top of the ventilation and have dehumidifiers but was horrified to discover dd1s bedroom (which I never enter by mutual agreement) has loads of mould - mostly white, some black.
Can I take care of this myself with vinegar and an open window? Or should I call in a mould specialist? Anyone know how much those guys tend to charge?