Overview
Easy to install refurbishment ventilator for existing roof spaces to increase the level of ventilation 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.
Manufactured from recycled Polypropylene.
Dimensions: 19mm (H) x 280mm (W) x 205mm (L)
10 per pack
Features & Benefits
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.
For further installation advice visit our How to Install page.