Condensation droplets on piping in loft

Condensation in Loft

Condensation building up in lofts and roof spaces has become an increasingly common problem for property owners in recent years, and if you don’t notice it early and take action that condensation can lead to serious issues like damp, black mould, and your timber starting to rot.

There are many reasons that condensation could build up in your loft space, but one of the most common reasons is that air becomes trapped because of modern, energy saving innovations. Features like insulation, double glazing, and cavity walls (as well as others) can all contribute to the build up of condensation.

One of the most common signs that you might have condensation in your loft is the presence of moisture inside your roof tiles. If you ignore this problem in particular, the moisture could develop into black spot mould on the walls and ceiling.

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What Causes Condensation in Loft?

Just like with any room in your house, condensation in the loft is caused by an abundance of warm, moisture laden air trapped within your property as a result of poor ventilation.

Below you can find the main reasons for condensation building up within a loft space:

    • Insulation Fitted Incorrectly

Loft insulation has a number of well-documented benefits, the most prominent of these is obviously driving down your heating and energy bill costs by keeping your property warmer during the cooler months; especially important during this cost of living crisis.

However, if your insulation has not been fitted correctly it can directly contribute to condensation problems.

This is a byproduct of the insulation keeping your property warm. If that same warm air can’t circulate and ventilate properly, it has to go somewhere. The moisture-laden air will come into cold surfaces in the loft, and condense into water, which causes condensation. Condensation could, over time, lead to dampness in the loft.

Its very common for property owners to discover condensation as a result of poor insulation in their loft, so if you are considering additional insulation in your loft space,  make sure to contact a contractor fully qualified and well practised in carrying out the work.

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    • Poor Ventilation due to the Sub Par Design of Vents or Clutter Too Close To Walls

Many new building properties have well-designed roof ventilation. When moisture laden air rises, the air can escape through ridges built into the roof itself, allowing for good, healthy air circulation of air.

This might well be a different case in older buildings. You might experience properties where there are only one or two tile vents, but properties also exist where there is no roof ventilation at all, which causes condensation to build up quickly and easily.

There are situations where the homeowner themselves contributes to creating the perfect conditions for condensation build up because of the amount and manner of objects stored in the loft.

For example, if too many storage boxes have been cluttered together in your loft, the resulting factor will be that air cannot circulate because of the stacked nature of the loft itself.

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    • Cold and Hot Water Tanks in the Loft

If a property has a hot water tank in the roof, this can be a surefire reason for condensation to start building up. The reason is pretty self explanatory; as the hot water tank heats water up, steam is going to be produced as a natural by-product. If the water tank isn’t properly sealed, this steam can easily seep out of the tank and into the loft.

In this instance, that steam is going to condense in the loft space if it can’t ventilate properly, and over time (especially in winter) the amount of condensation in the loft space is going to steadily increase.

You can prevent this from happening by double-checking that the lids on water tanks are securely shut, and by making sure that the warm air can be safely vented out of the loft easily once its been created by the hot water tank. This also applies to cold water tanks as well, when there is no water evaporation.

For more in-depth information on the causes of condensation, you can always visit our “what causes condensation” page.

How To Stop Condensation in Your Loft?

There are two main steps to take when stopping condensation from happening in your loft.

The first step is to ensure that there is good air circulation, and ventilation options available for the warm air to escape through.

The second step is that you should reduce or remove as much warm moisture in the air as possible.

To ensure that there is good air circulation in and around the loft you must remove any objects that could be obstructing the airflow and ensure that all ventilation slots are not blocked or jammed. You can also add further loft vents to provide a good air circulation flow.

Having excessive damp and humid air is common in households due to warm air rising from below and condensing into cold areas of the loft space. To reduce warm air from rising into the loft you can open windows and doors in bathroom and kitchen areas, dry clothes outside where possible and use extractor fans. If these solutions don’t work, then it is recommended that professional condensation solutions are carried out.

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Professional Solutions to Loft Condensation

If you have tried carrying out the above suggestions to solving your problems of condensation in the loft and it has not worked, then we would recommend contacting one of our fully qualified surveyors for further advice.

Our surveyor will carry out a thorough inspection of the causes of the condensation problem and potentially look at installing one of our professional condensation solutions such as a positive ventilation system.

Helping Solve Problems with Condensation in The Loft

We would always recommend carrying out DIY tips on treating condensation in the loft yourself but if the problem persists then contact one of our specialists at Timberwise.  Our experts have over 50 years of experience in solving loft condensation problems. You can contact our team by requesting a survey online or calling 0800 288 8660.