Felt Lap Vent



The 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, 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 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  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.




• Helps to combat the problem of condensation build up in any roof space with a lapped felt/ membrane construction

• Fitted retrospectively


Product Features & Benefits


• Can be fitted at joist centres ranging from 400mm to 600mm

• Easy to fit, the tapered lead in helps to slot the product between the felt laps

• The 3 felt clips help secure the product in place even if the edge of the felt is degraded

• Lightweight and resistant to corrosion and rotting

• Each unit will provide 3,000mm² of free airflow into the batten void





• Manufactured in White Polypropylene




Dedicated To Supporting Builder's Merchants







Product Range



Felt Lap Vent








Pack Qty


Contact Information

  • Terms & Conditions

Phone: 01709 728150



01709 724975



Address: Barbot Hall Industrial Estate, Mangham Road, Rotherham, S61 4RJ


Sales Fax No:



Email:  sales@pbpltd.co.uk

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