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10 x Loft Space Ventilation Felt Lap Ventilator

10 x Ventilation loft space airflo g630 attic space ventilation


 
List Price: £31.50 (£37.80 inc VAT)
Your Price: £18.49 (22.19 inc VAT)
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Product Code:
MAN-G630X10
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Product Description Delivery Information Installation Guide
 

10 x Loft Space Ventilation Felt Lap Ventilator

Pack of 10 vents

Felt Lap Ventilator

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 & 6.2.1.1

Product Benifits
  • Can be fitted at joist centres ranging from 400mm to 600mm
  • 3,000mm2/m airflow
  • 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


Felt Lap Size

Features & Benefits

The G630 Felt Lap Ventilator

The Manthorpe Felt Lap Vent is a refurbishment product designed to increase the amount of ventilation into existing roof spaces with a lapped felt/membrane construction.

The product is intended to be fitted retrospectively to properties that have had additional loft insulation recently installed. 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.

The product will not meet the requirement for roof space ventilation solely on its own; it will only provide airflow through the felt laps into the batten void. The rate at which water vapour is then removed from this batten space is determined by the permeability of the roof covering, see BS 5250:2011, H.4.1.

Other measures may need to be in place to ensure that the adequate amount of ventilation is provided to the roof space.

The specifier should also be aware that the opening of felt laps on the property may adversely increase the wind uplift load on the tiles/slates and affect the driving rain resistance of the roofing felt, for more information see BS 5534:2003, 5.8.1 & 6.2.1.1


Associated Products
Loft Space Ventilation Felt Lap Ventilator
Your Price: £1.85 (2.22 inc VAT)

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