Manthorpe Felt Lap Vent G630

£2.96 INC. VAT
£2.47 EX. VAT

50 in stock


****Due to huge demand following the cold weather the Manthorpe version is unable until January. A Timloc version which is very similar will be sent instead until we are able to get more stock. Please message if you require the Timloc spec sheet****

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, 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 specifier should ensure that the opening of felt laps on the property will not adversely increase the wind uplift load on the tiles/slates or the driving rain resistance of the roof, for more information see BS 5534:2003, 5.8.1 &

  • 3,000mm² airflow per G630
  • 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


    Spec Sheet

    Spec Sheet

    275 x 20 x 194mm
    Injection Moulded


    Fitting Instructions