Accredited & insured
Not sure it's "damp" exactly — just a stuffy, mouldy bathroom or a bedroom that never seems to air out? This is usually where the answer starts.
Identify why moisture is building up, and whether ventilation, heating pattern or building fabric is the real cause.
Understand the conditions driving mould growth, not just the visible patch.
A fixed-duration monitoring session in the worst-affected room, included as part of a full diagnosis.
£120–£200 standalone, or included as part of a full damp diagnosis.