Condensation In The Loft

Condensation In The Loft

At this time of year you should check your attic to make sure insulation is dry. You can check any flooring for droplet spots or the underside on your roofing felt. Warm air holds more moisture and this can rise up into the loft from cracks or gaps below. If the loft is cold and the moisture reaches the dew point, it will condense and can contribute to mould growth or a musty smell. Not only can this cause respiratory issues but it can ruin any items stored up there.

Is Your Loft Insulation Causing Mould?

It’s important to state that loft insulation does not cause mould. However you might notice that since “doubling up” on your loft insulation, your attic has become musty or damp. Why is this?
Well this can be caused by many things but mostly due to the fact that the more insulation you put down, the colder the loft tends to be. The insulation is trapping the warm air and keeping the living space warm and cosy below. Less of this heat is escaping into the loft.
Colder surfaces means the likelihood of condensation if any warm moist air gets into the loft.
You might find that loft insulation is obstructing the eaves ventilation. This should not be the case but we have seen many cases where insulation has been stuffed into the eaves, blocking the fresh air from entering the loft.

It’s good to check that any extractor fan hoses are snug and properly vented to the outside. These can slip off in the loft and you certainly don’t want the steam from a hot shower entering the roof space.

What Can I Do To Stop My Damp Loft?

We can’t stress enough the importance of ventilation in the loft of a well insulated home. Should any moist air enter the attic, it will have a means of escape. A loft should have plenty of fresh ventilation and feel “drafty”. This means moist air won’t get the chance to condense and loft insulation won’t become damp or wet.

Damp Roof Problems

Many solutions exist to help ventilate a loft. The universal tile vents are fantastic for retrofitting. There is also soffit vents and ridge ventilation systems. If you have these measures in place and still have a damp loft or signs of water ingress then we can provide a comprehensive building survey to help you source the problem.

Damp or water ingress can lead to major issues including timber rot and can contribute to a suitable environment for wood boring beetle. Early intervention is cheap and reletively easy to do rather than wait for any major damage.

If you would like to book a building surveyor in Northern Ireland please call Philip on 07702 332 333.

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