Perfect solution for venting the loft.
Refurbishment ventilator for existing roof spaces to increase the level of ventilation in a roof space by separating lap joints in the roofing felt/membrane.
Also a remedial solution for combating condensation in cold roof voids and can be fitted retrospectively after increased loft insulation.
Discrete profile design.
Easy installation.
2 spring clips to secure each unit in place.
3000mm2 additional free vent area per unit.
Suitable for rafter spacings from 400-600mm centres.
Designed only to enhance existing ventilation via felt/membrane lap joints.
Consideration must be given to increased risk of wind uplift and driving rain resistance outlined in BS5534:2014.
Manufactured from recycled Polypropylene.
Dimensions: 19mm (H) x 280mm (W) x 205mm (L)
How many Lap Vents do I need?
This will vary dependant on the level of extra ventilation required and length of the roof.
To provide typical ventilation, allow for 1 lap vent every alternate rafter space at low level,
on opposite sides of the roof. If maximum ventilation is required, install at high level and
every rafter space along the full length of the roof.
