10 x Felt Lap Vents Prevents Loft roof Condensation. Attic Space Ventilation

Product Information

For roof spaces that require more than the 15000mm/m² the spacings half for each additional 5000mm/m² We’ve also published a price guide for ventilation options, including tile vents, eaves vents and flat roof ventilation. Explore our roof and loft ventilation price guide here.

In cases of severe condensation or for large roofs where the distance between eaves exceeds 10m (30ft), or the roof pitch is steeper than 35o, then it is recommended that an additional row of ventilation panels be fitted into the highest line of roofing felt or underlay lap closest to the ridge on both sides of the roof. The panels should be fully inserted with the ribs uppermost and the two retaining tabs locating over the exposed edge of the roofing underlay. The gap between a house’s roof and a house’s ceiling is called the roof void. In most houses, this is the loft or the attic. In houses with flat roofs, there is no roof void and roof vents are not needed. The position of the roof void means that it needs ventilation to prevent condensation. Without this, the rot will begin to set in in the timbers of the roof and spread to the rest of the house.There are a wide variety of roofing vent types available. Here is a brief overview of the most common. Roof tile vent Wall vents that provide air to a room with heat-producing appliances (e.g., gas appliances or central heating boilers).

Over vent” fascia is another good solution for problematic roofing spaces but does not offer as easy of an installation process. However, the mesh grill design keeps out pests and is ideal for those who desire a hidden solution, unlike soffit vents.The roof or loft vents require a breeze to pull the moisture out of the loft, so, on calm days, you may experience more condensation. Ideally, you will want to have a perfect balance. So, try to consider what is needed and what might help further in specific weather. Here is how to calculate the number of roof vents needed for your roof: Roof ventilation from Manthorpe can help save both pennies and the environment. In an increasingly energy-conscious world, clients are much more aware of how to save money as well as the planet, so specifications can become even more demanding, putting extra pressure on budgets. Fortunately, Manthorpe’s cost-effective solutions cater for all types of roof ventilation requirements, including new build and refurbishment.