Landlords and agents should make tenants aware that their deposit will be at risk should damage to the property occur due condensation and mould, says The Association of Independent Inventory Clerks (AIIC).
In Britain, condensation in residential property is mainly a winter problem particularly where warm moist air is generated in areas like kitchens and bathrooms and then penetrates to colder parts of the building. When the air gets cold, it cannot hold onto all the extra moisture produce by everyday activities, so some of this moisture appears as small droplets of water – most noticeable on windows or where there is little movement of air. If not properly dealt with, this extra ‘dampness’ can lead to mould growth on walls, furniture, window frames, even clothes.
Condensation and mould is a common problem. Older properties tend to suffer more than new ones, but rental properties are particularly prone. The problem is often a matter of degree: from a small patch of mould or discoloured wallpaper behind the wardrobe, in the very top corner of a bedroom, to serious amounts of mould growth across walls, inside wardrobes and on clothes, furnishings, carpets and in basements.
Causes of mould growth from straightforward building defects are without doubt the landlord’s responsibility in a residential property. However, by far the most common cause of mould growth is condensation. The true cause of condensation-based mould growth is often complex and a combination of things. It is sometimes caused by inadequacies in the building, but very often the main cause of mould growth is the lifestyle of the occupants – the tenants.
Pat Barber, Chair of the AIIC, said: “Many tenants live in older properties and have inadequate heating and ventilation and the average tenant will produce condensation through cooking, washing, internal drying etc. Condensation can lead to mould, a serious problem for both landlord and tenant because of the health risks associated with mould spores. The mould fungi have been identified as the source of many health problems, including infections, asthma, allergies and sinusitis. Moulds produce allergens, irritants, and in some cases, toxins that may cause reactions in humans.
“Landlords and agents need to be aware of the potential problems which damp, excessive condensation and mould growth can cause and should take steps to minimise the risks. It is unlikely that rented accommodation can be completely condensation free, even a new one. However by keeping the property properly maintained and thinking about occupiers’ lifestyles, landlords and agents should be able to control it to acceptable levels.”
AIIC has put together some advice that landlords and agents should give tenants:
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Dry all windows, windowsills, and any other surfaces that have become wet. Ensure you wring out the cloth thoroughly, do not dry on the radiator!
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Try to keep the interior temperature of the property at a reasonably constant level.
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If possible, always hang your washing outside. If this is not possible, you could hang it in the bathroom, with the door closed, and window slightly open for ventilation. Do NOT dry washing on radiators as this will add to the moisture already in the air.
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Ensure that all extractor fans are working efficiently. Noisy extractors will encourage tenants leave turned off. (If an extractor cannot hold a postcard to the vent when switched on it is not efficient enough).
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If you use a tumble dryer, ensure it is well ventilated to the outside, or that it is the new condensing type.
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Try to ventilate your kitchen when in use, either by opening a window slightly, or using the extractor fan. Try to ventilate both kitchens and bathrooms for at least twenty minutes after use.
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If your property is prone to condensation then daily use of a de-humidifier unit can be very beneficial. These come in all shapes and sizes, cost very little to run and draw out the excess moisture from the air helping to keep the condensation under control.
The AIIC is a not for profit membership organisation and is committed to excellence and professionalism in the property inventory process. The AIIC works hard to ensure that all landlords, tenants and letting agents understand the importance and benefits of professionally completed property inventories.
For further information on AIIC, please visit
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