Damp, Mould and Disrepair: The Complaint That Becomes a Claim

Of everything a tenant can report, damp is the one most likely to end up somewhere expensive.

Partly because it is genuinely hard to diagnose. Mostly because the standard first response - you need to open the windows - is both the cheapest thing to say and the thing that reads worst eighteen months later when it is read out in a courtroom.

This is how to tell the three kinds apart, what to do in the first week, and what is coming for private landlords in England.

Three kinds of damp, and only one is arguably the tenant's

Penetrating and rising damp are building defects. They are yours, without argument.

Condensation is the one landlords reach for, because it is the one where tenant behaviour is part of the picture. It is also where most landlords overestimate their position.

Why the lifestyle defence usually fails

Condensation needs three things: moisture, cold surfaces, and nowhere for the moist air to go. A tenant controls the first. You control the other two.

So the question is rarely "did the tenant dry washing indoors?" It is whether the property could handle normal occupation. Normal occupation includes cooking, washing, bathing and breathing.

The things that decide it are almost all yours:

• Extractor fans in the kitchen and bathroom - present, working, and actually vented outside
• Trickle vents on windows, and not painted shut
• Insulation, particularly cold spots and thermal bridges where mould appears first
• Heating that works and is affordable enough to actually be used

That last point does more work than landlords expect. A tenant heating one room because the system is expensive to run is a heating problem presenting as a behaviour problem.

Where a property has no working extractor and single glazing with painted-over vents, "open a window" is not a defence. It is evidence.

The first week decides how this goes

Almost every disrepair case that goes badly for a landlord contains the same fact: a report that sat unanswered.

1. Acknowledge in writing, the day you get it. Even just: received, arranging an inspection, here is when. This single email is worth more than most of what follows
2. Inspect promptly and in person, or send someone competent. Photograph everything, including the meter readings and whether vents and fans exist and work
3. Diagnose before deciding. If it is not obviously condensation, get a surveyor. A damp specialist who sells damp-proofing is not a neutral diagnosis
4. Fix what is yours, quickly, and say when you will do it
5. Write down what you did and when, and keep the photographs

If part of it genuinely is ventilation behaviour, deal with that as well as the building work, in writing, without blame - and having first made sure the ventilation you are asking them to use exists and functions.

What is coming for private landlords in England

Two changes are on the way that will tighten this considerably.

Awaab's Law - already applying to social housing - is to be extended to the private rented sector. It sets binding timescales for investigating and fixing serious hazards including damp and mould, rather than leaving "reasonable time" to be argued about afterwards.

The Decent Homes Standard is likewise to be extended to private rentals, setting a minimum condition every let property must meet.

Neither is in force yet. Both sit in a later phase of the Renters' Rights Act rollout, with the detail subject to consultation and no confirmed commencement date - commentators generally point at 2027 at the earliest. Do not plan around a specific date, and do not assume it has already happened.

What is worth doing now is the part that is useful regardless: knowing whether your property has working extraction, adequate insulation and heating that gets used. A landlord who has that in hand will find the new standard largely administrative. One who does not will meet it as a bill.

What already applies, everywhere

Waiting for new law would be the wrong reading. Obligations already exist, and in most jurisdictions they run along the same lines:

• A property must be fit to live in, in a sense the law defines rather than you
• The structure and exterior are the landlord's to repair
• Heating, water and sanitation must work
• A serious health hazard can be enforced by the local authority, with the power to compel work

A tenant reporting damp can typically go to the council, and an inspection that finds a hazard can produce an enforcement notice, work in default charged back to you, and a mark on your record that follows you into registration and licensing.

The consequences that actually bite

Landlords tend to price this as the cost of the repair. The repair is usually the smallest part.

• Rent repayment or compensation for the period the property was in disrepair - which can reach back a long way
• Council enforcement, including work done in default at a price you did not negotiate
• Possession blocked. In several jurisdictions, disrepair a tenant has reported can obstruct a possession claim entirely
• Your insurance, which will not cover damage from an unrepaired defect you knew about - see Landlord Insurance
• The property itself, since prolonged damp damages plaster, joinery and floors far beyond the original fault

An extractor fan is cheap. A disrepair claim covering two years of rent is not, and the gap between them is mostly a matter of how fast the first email went out.

Frequently asked questions

The tenant dries washing on radiators and never opens a window. Is that not their fault?

It contributes. It rarely decides the case on its own. The question a court or council asks is whether the property could cope with ordinary living - and drying clothes indoors in winter is ordinary. Fix the ventilation first; then a conversation about behaviour is reasonable rather than defensive.

Can I charge them for cleaning the mould?

Only where the damp is genuinely their doing and the property is demonstrably adequate - which is a high bar and needs evidence. Attempting to recover it from the deposit without that evidence tends to fail at adjudication and looks bad afterwards. See Tenancy Deposits.

Should I use a damp-proofing company?

For diagnosis, be careful - a company selling injected damp courses has an interest in finding rising damp. An independent surveyor with no product to sell costs more up front and frequently saves the entire job, because a surprising amount of "rising damp" turns out to be a leaking gutter.

The tenant will not let me in to inspect.

Put every attempt in writing, with dates and proposed times. A documented refusal is a genuine defence; an undocumented one is your word against theirs. Never enter without the notice your agreement and local law require.

Is mould always damp?

Mould needs moisture, so yes - but the moisture source is the question. Treating the mould without finding the source is painting over the problem, and it returns within a season.

What if the property is simply old?

Age is not a defence, but it does change what a reasonable standard looks like. Solid-wall properties behave differently from cavity-wall ones and need different handling. Get advice specific to the construction rather than applying modern assumptions to a Victorian terrace.

The record that decides it

Every scenario above turns on the same evidence: when was it reported, what did you do, and when did you do it?

A landlord with dated photographs, an email acknowledging the report the day it arrived, an invoice for the fan, and a note of the follow-up visit is in a completely different position from one who remembers dealing with it.

The Rental Property Tracker keeps maintenance spend and dates per property alongside the rent, so the repair history exists as a record rather than a memory - and it feeds the expense claim at the same time. $27 once.

And at the start of a tenancy, a dated, photographed inventory report is what establishes the property's condition before anyone disagrees about it.

General information for landlords, not legal advice. Repairing obligations, fitness standards, enforcement powers and hazard rules differ substantially between countries and change frequently, and the extension of Awaab's Law and the Decent Homes Standard to private rentals in England is not yet in force and remains subject to consultation. Check the rules applying where your property is, and take advice on any disrepair claim.