Damp and mould: the clock starts when a tenant tells you

Damp and mould reports rise sharply once heating season starts, and they arrive in a form that is easy to mishandle: a tenant message describing black marks in a bedroom corner, often with a photograph, often at the end of a week. What happens in the following seven days determines almost everything about how that case resolves.

The regulatory environment around damp and mould has moved considerably, and it continues to move. Expectations differ by tenure, and requirements that apply to social housing are not automatically the same as those applying to a private rented property, with further changes proposed. That detail genuinely should be checked against current government guidance for the tenure you are managing rather than taken from any article. What does not vary is the operational practice, and the practice is where most cases are won or lost.

The single most damaging habit is informal triage

The historic default across much of the industry was to treat a mould report as a lifestyle issue pending evidence otherwise — ventilation advice, a recommendation to open windows and dry washing elsewhere, and a note to review if it persists. Some of that advice is sometimes relevant. As a first response it has become indefensible, and it tends to be delivered verbally, which means the file shows a report and then a gap.

The problem is not that condensation never contributes. It is that the judgement is being made remotely, before anyone has looked, on the basis of a photograph. Mould in a bedroom corner can be condensation. It can also be a failed cavity tray, a leaking waste pipe in the void above, a bridged cavity, a blocked or disconnected extract fan, or penetrating damp from a defective gutter — several of which look identical in a photograph.

If advice is given, it should be given alongside an inspection rather than instead of one, and it should be in writing so that the record shows what was said rather than what someone later recalls saying.

What to capture at the point of report

The report itself is the start of the evidence chain, and most systems capture almost none of it. A line reading "tenant reports mould" with a date is close to useless three months later.

• –The date and time of the report, and the channel it came through. A report made to a contractor on site still counts as a report.
• –Exactly what the tenant said, in their words, including how long they say it has been present.
• –Which rooms, which surfaces, and the extent as the tenant describes it.
• –Whether anyone in the household has a respiratory condition, is elderly, is pregnant, or is a young child. This is the single most important triage input and it is the one most often not asked.
• –Whether there has been a previous report at this property, by this tenant or a previous one.
• –Any photographs supplied, attached to the case rather than left in an inbox.
• –What was said back to the tenant, and when.

The vulnerability question deserves emphasis. A mould problem in a property occupied by an adult in good health and the same problem in a property with an infant are not the same case, and the response time should not be the same either. If your intake process does not ask, your triage cannot reflect it, and the absence of the question is itself visible in the file.

Inspect properly, and record what you did not find as well as what you did

An inspection that records "mould present in bedroom, advised ventilation" has documented a symptom and a conclusion with no reasoning in between. What makes an inspection record useful later is that it shows what was checked.

That means recording the readings if moisture readings were taken and where, the condition and function of extract ventilation including whether it was actually tested rather than looked at, the external condition of the wall at that location, the state of gutters and downpipes serving that elevation, whether there are services in the void, and the room's heating provision. Negative findings matter: "extract fan tested, operating, adequate flow" is a materially stronger record than silence on the subject. What a property inspection report should record covers the general shape, and damp cases are the clearest argument for the detail.

Photographs should include context as well as close-ups. A close-up of mould proves mould. A wider shot showing the corner, the window, the heating and the extract tells the story, and in six months it is the only thing that will.

Treating the mould is not fixing the cause

Mould wash and repaint is fast, visible and satisfying, and on its own it is a temporary measure. If the cause has not been identified and addressed, the case will reopen — typically within the same heating season, often with a more frustrated tenant and now with a record showing the landlord attended and did something that did not work.

Where a treatment is carried out before the cause is resolved, the record should say so explicitly: that this is an interim measure, what the suspected cause is, and what is scheduled next. That converts a partial response from something that looks like a failed fix into something that looks like a managed sequence. How a finding should move through to a completed repair is the mechanism; the discipline specific to damp is that the case should not close on the treatment.

Severe cases need a different route

Most damp reports are not emergencies. Some are. Extensive mould in a property with a vulnerable occupant, mould affecting a bedroom that is the only sleeping space, or damp accompanied by electrical concerns all justify treating the case on an urgent footing rather than queueing it behind routine repairs.

That requires the out-of-hours and urgent route to recognise damp as a possible trigger at all, which many do not — how an out-of-hours repairs process should be structured is worth reviewing on that point before the season rather than during it.

Managing across a portfolio

For agents acting for multiple landlords, there is a further complication: the decision to spend money is not yours. A landlord declining to authorise investigation or works does not remove the obligation to the tenant, and it places the agent in a position that should be documented with some care — what was recommended, when, what the landlord instructed, and what the agent advised about the consequences.

Handling repairs across multiple landlords deals with the general case. For damp specifically, the recommendation and the instruction should both be in writing every time, without exception, because this is the category of case most likely to be examined in detail later.

Across a portfolio it is also worth looking at the pattern rather than the individual cases. Repeat reports at the same property across different tenancies point at the building, not the occupants. Clusters in properties of the same construction type, or the same retrofit measure, point at something systemic that will keep generating cases until it is addressed at that level.