Manthorpe G630 Felt Lap Vents Prevents Loft Roof Condensation Attic

About This Product

The product has been designed as a remedial solution to help overcome the build-up of condensation in the roof space, however like all products that open the felt lap to provide ventilation it does not meet the code of practice BS 5534:2014+A2:2018 6.2.1.1 Installation: - Initially it is recommended that one ventilator be placed into the laps in every other rafter bay, down at low level (as near to the eaves as possible) and on both sides of the roof space to ensure a cross flow of ventilation. Gude: Manthorpe G630 Felt Lap Vent Fttng nstructons | Bn store... - Easy to fit, the tapered lead in helps to slot the product between the felt laps. The product is intended to be fitted retrospectively to properties that have had additional loft insulation recently installed. 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. Roof Vent Manthorpe G630 Felt Lap Vents Prevents Loft Roof Condensation Attic Felt Lap Vents For Loft Usually fitted retrospectively to properties with additional loft insulation recently installed, however the Felt Lap Vent will help to combat the problem of condensation build up in any roof space with a lapped felt/membrane construction - The product can be installed in roof spaces with rafter spacings ranging from 400mm to 600mm. - The 3 felt clips help secure the product in place even if the edge of the felt is degraded. Usually fitted retrospectively to properties with additional loft insulation recently installed, however the Felt Lap Vent will help to combat the problem of condensation build up in any roof space with a lapped felt/membrane construction. If additional vents are required, then more vents can be placed into the other felt laps within the same rafter spacing at higher intervals. Roy Wier - North Liberty, IA Certified Home Inspector Can be fitted between 400mm joists and 600mm joist openings. The Manthorpe G630 Felt Lap Ventilator is a refurbishment product that is designed to increase the amount of ventilation into existing roof spaces with a lapped felt/ membrane construction. - For further information on the recommended ventilation requirements for roof spaces refer to BS 5250 Code of Practice for Control of Condensation in Buildings. However the felt lap vent will help to combat the problem of condensation build up in any roof space with a lapped felt / membrane construction. The vent will help to combat the problem of condensation build up caused by the extra insulation by adding additional ventilation into the roof space. Easy to fit just slots between the felt laps.