Does a wet window prove one cause for every patch?
Describe the observations in each area. Assessment should consider relevant moisture questions rather than assuming one explanation for the whole property.
Should I mention a leak even if it was repaired?
Give the known history, timing and work carried out. It is useful context, not a reason to diagnose the current source yourself.
Does ventilation advice include a new fan?
Installation and related work should be clarified separately. Ask what has been recommended and what is actually included in the agreed quotation.
Can surface treatment alone prevent recurrence?
Moisture and remaining work matter. Ask about next steps and report returning wetness or growth for appropriate assessment.
Is condensation assessment the same as a medical check?
No. A cleaning enquiry cannot diagnose symptoms. Seek healthcare advice for health concerns and discuss property findings as a separate matter.
Can I ask about more than one room?
Identify each location, material and history. Check the named scope instead of assuming an initial photograph includes treatment throughout the property.