We could also see that the loft insulation was bunched up in the corner, directly above the damp patch. To reduce the chances of condensation you need to increase the ventilation in your loft to try and get rid of any water vapour that may be present, before it manages to condense.

Crafted with 10mm-wide hollow polycarbonate sheets and cut to 150mmx150mm pieces, this vent comes in 40-unit boxes and is easily installed by professional or DIY. From soffit vents to roof extractor vents, wall ventilators, air bricks and more, find effective ventilation solutions for your home or business here. It can be hard to tell if it’s condensation or the roof is leaking, particularly as it can be astounding how much moisture can condense in the right (or should we say, wrong) conditions. Simple to install even for a DIY Enthusiast, the vent simply slides between the two layers of underlay felt beneath your existing roof tiles or slates. There is a calculation that is use to work out the airflow required but it is based on a given airflow requirement.You can change your choices at any time by visiting Cookie preferences, as described in the Cookie notice. Don’t forget: It’s normal to see a little bit of condensation after you’ve created moisture in the home (cooking, bathing, showering), especially when it’s very cold in the loft. Showering or bathing without opening the window or using an extractor fan can cause moisture levels to increase, as can washing clothes on radiators etc. These are usually retrofitted to properties as part of remedial work such as installing additional loft insulation or fitting PVC eaves cladding. Well it’s true and I know because I worked as a roofer for 17 years and have fitted this product to hundreds of lofts but you don’t need to pay for a roofer.

Ventilation tiles/slates are another method of providing additional ventilation to a property which had restricted ventilation at the time of construction. This is usually due to missing insulation under the roof tiles which causes cold spots where condensation forms. Job was done in about 30min, very simple, only problem was to reach the right area, so nothing to do with the product itself. If you’ve checked all the above and decide that you do need additional ventilation you could have circular soffit vents fitted.

The product will not meet the requirement for roof ventilation solely on its own, it will only provide airflow through the felt laps. of loft condensation cases can be resolved to an acceptable level by improving the ventilation rather than retrofitting a vapour barrier. This is often the result of high humidity levels in the home; some of this moisture will make its way into the loft. Tile/Slate Vents - If you’ve had tile vents fitted get up into the loft and make sure the sarking felt/membrane (the waterproof felt under the roof tiles has been cut below the tile vents to allow air in.

If you're interested BS 5250:2021 - Management of moisture in buildings makes for an interesting read! The 103 third parties who use cookies on this service do so for their purposes of displaying and measuring personalized ads, generating audience insights, and developing and improving products. The felt lap vents are a very cost effective way to add ventilation to the attic, and they can feel a cool air circulating.At DIY Gardening, we follow a detailed, rigorous process to create content that is helpful, factually correct and meets the highest standard of integrity. Whilst ventilation is important to help keep a house cool in the summer, other factors such as tiles, insulation, colour and sun exposure are equally important. When this moisture condenses in a cold loft it can eventually lead to costly problems like rotten roof timber. He previously worked as a project manager and has experience in managing teams of tradespeople and landscape gardeners on both small and medium sized projects.