Condensation is a common problem in tower blocks, and it can add to issues with mould or damp.
You’ll notice water on the inside of your windows, especially on colder days. If the problem is serious, there might be peeling paint or black mould on the walls and ceilings.
Condensation happens when warm air with a high moisture content (like the air inside your flat) hits cold surfaces (like the windows).
Living causes condensation Showers and baths, central heating, drying wet laundry indoors, large fish tanks, boiling kettles and cooking — even just people breathing — all add to the moisture content of air in your flat.
Buildings cause condensation The construction of your block can play a part. In blocks where windows are sealed or kept closed most of the time, there is nowhere for the air to get in and out, and the moisture collects as condensation.
Poor insulation in buildings can also be a major factor in condensation dampness, because it causes internal walls to be colder. Also, some houses are difficult to heat, without spending an excessive amount on heating. If, as a result, rooms are cold, that can cause condensation dampness to occur.
Good building design will incorporate extractor fans to remove the moist air, windows that can be opened a little whenever needed, better insulation, and affordable heating.
There is also some benefit from keeping a constant temperature in your flat, rather than having bursts of heat in the day and a colder period in the night.
The relevant law is the Landlord and Tenant Act 1985, section 11. Your landlord is responsible for keeping the exterior and structure of your flat in good repair. So, if the condensation is caused by disrepair, they must fix it.
In England and Wales, the way the law is written means that if the issue is caused by the design of your building, rather than by disrepair, this will not apply.
The position is different in Scotland. Under schedule 4 of the Housing (Scotland) Act 2001, the first duty of the landlord is to ensure that the house is, at the commencement of the tenancy, wind and watertight, and “in all respects reasonably fit for human habitation” and to keep it in that condition throughout the tenancy.
Accordingly, if the landlord lets a house which, because of its design, is subject to condensation dampness when tenants occupy it, the landlord will be in breach of their duty.
But your landlord must also continue to ensure that your flat is ‘fit for habitation‘. So if the condensation is leading to mould or damp and that is likely to make, or is making you ill, they must do something about it.
The law is set out in the Homes (Fitness for Human Habitation) Act 2018.
In addition, the Housing Health and Safety Rating System, introduced under the Housing Act 2004, lists potential hazards that landlords must address, including mould and damp.
Also see the ‘further information’ section below.
Where tenants complain of condensation dampness, it is not uncommon for landlords to advise tenants that this is due to way in which they are heating or ventilating the house. In other words, they suggest that the tenant is causing the problem.
However, poor insulation, or difficulty in achieving affordable heating, may also be the reason behind it. Condensation dampness can also happen as a result of the relationship between insulation, heating and ventilation.
It may require the advice of an expert, such as a surveyor or an architect, to clarify the true cause of the problem. However, if multiple tenants, in a block, are having problems with condensation dampness, it will be more difficult for the landlord to argue that the problem is due to the behaviour of individual tenants.
The Housing Ombudsman released a report in October 2021 ‘Spotlight on Mould and Damp: It’s Not Lifestyle’ which makes 26 recommendations to landlords, urging them to be proactive and responsive to reports of damp or mould.
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