Felt Lap Vents

Felt lap vents increase the amount of ventilation into existing roof spaces and lofts. They are an affordable solution for those looking to reduce build-up condensation in their roofs and attics.

Much like other products we sell, the householder can install lap vents thus cutting down the cost of hiring a specialist roofer to do the job for you.

Reduces Condensation

Easy & Quick to Fit

Great Value for Money

Single Vent


Single Vent

£2.69 per vent (incl VAT.)

Most Popular


Pack of 10

£2.29 per vent (incl VAT.)

Best Value


Pack of 50

£1.77 per vent (incl VAT.)

Frequently Asked Questions

How many felt lap vents do I need?

From the installation guide, it is recommended to place one ventilator into the laps in every other rafter bay, down at low level (as near to the eaves as possible) and on both sides of the roof space to ensure a cross flow of ventilation.

How do I fit felt lap vents securely?

Installing felt lap vents is an easy process, you first want to make sure you can physically install them without any barriers or obstructions.

To find out more on in detail on how to install them, we recommend reading our guide.

Why does condensation happen?

Condensation happens when warm air clashes with cold surfaces or simply when there’s too much humidity in your home. This is prevalent in winter when your heating system comes on in the cooler hours of the mornings and evenings.