We can only provide a delivery date and are not able to confirm the time delivery will be attempted. Therefore, we ask that somebody is able to accept and sign for your items throughout the started delivery date. The key with abutment vents is that there needs to be a gap between the nearest batten and the flat wall. – 10mm for the Manthorpe vent though this can vary. The roofing felt needs to be draped around the battens so that the 10mm gap is clear. After this, the top layer of tiles needs to be placed so the abutment vent can be installed. Selecting the amount of airflow, then dividing the roof length by the spacing (in meters) indicated below. Free Flowing Airflow The Manthorpe Felt Lap Vent is a refurbishment product designed to increase the amount of ventilation into existing roof spaces.

Products are also available for slate roofs in the form of slate vents. Compact, easy to install, and discreet, these vents are ideal for period properties and stone houses, where they promote airflow and keep roof spaces free from condensation. They slot in place just like regular roof slates and blend in seamlessly with the rest of the roof. Felt lap vents are designed to increase the amount of ventilation in existing roof spaces. They tend to be fitted retrospectively to properties which have additional loft insulation, with the roof lap vent helping to combat the issue of condensation accumulation.

Manthorpe felt lap vents provides an effective solution to increasing the amount of free air ventilation to your roof space and thus preventing condensation. Typically retro-fitted in older refurbished properties that may not have an effective roof ventilation system or tile vents installed, and which may have had additional loft insulation. The Felt Lap Vent helps to combat the problem of condensation build up due to warm air in any attic or loft with a lapped felt/membrane construction, by increasing ventilation. Please ensure that you work safely at all times and get advice or help from a professional trades person if you are unsure. Felt Lap Vent Installation

Please Note: The specifier or user should be aware that the opening of felt laps on the roof may adversely affect the driving rain resistance of the slates, tiles or shingles, as well as increase the wind uplift forces acting on them. Our sales office will need to be made aware of any delivery restrictions, such as narrow lanes, overhanging trees etc. that may cause restrictions.Easy to fit and install with a tapered lead-in that aids in smoothly slotting between the felt laps, these felt lap vents from Manthorpe are refurbishment products that increase ventilation in your existing roof spaces. 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. They can be installed from inside the property so no need to remove any of the existing tiles, timber battens or felt. Important loft lap vent installation notes

You're able to select a preferreddelivery date in your shopping basket. Whilst we aim to deliver your items on this date, it is not guaranteed. For roof spaces that require more than the 15000mm/m² the spacings half for each additional 5000mm/m² The Manthorpe Felt Lap Vent is a refurbishment product designed to increase the amount of ventilation into existing roof spaces. Usually fitted retrospectively to properties with additional loft insulation recently installed, the Felt Lap Vent will help to combat the problem of condensation build-up in any roof space with a lapped felt/membrane construction. There are many products available to help you stop loft condensation, and most of them are inexpensive. Remember that they require a lot more work to fit, and work is often undertaken on the outside of the building. Here is an overview of 3 other roof vents that may help you: Roof VentsDelivery charges will vary and will depend on the manufacturer, weight, size and delivery location. The cost is automatically calculated when you add items to the shopping basket. Felt lap vents are another great way to help ventilate your loft or attic. Rather than creating an opening in the roof itself, felt lap vents just create an opening in the roofing felt. Roofing felt is a membrane between the tiles and the actual loft. While the tiles on the top of a house allow some air through, felt lap vents allow that air to make it through the roofing felt. This is particularly important if your house has roofing felt made up of a non-breathable membrane. At ERoofing, we carry the versatile and effective Manthorpe Felt Lap Vent, one of our best-selling products. But roof vents aren’t as simple as just drilling some holes in your roof and calling it a day. To make sure that the roof is still waterproof, you need to use specially designed roof vents. But there’s no reason to fear, there are several different approaches to roof vents and you’re sure to find one that suits your roof. Tiled Vents Each felt lap vent creates an air gap delivering up to 3000mm2/m of ventilating airflow. When combined with existing roof space ventilation, fitting evenly spaced lap vents on both sides of the loft will fix most loft condensation problems.