Corovent Ventilation Accessories

Felt Weir

Felt Weir FW1

The Corovent Felt Weir features ridges which guide any condensation or rainwater away from the opening in the felt when fitting any roof vents. It helps to ensure that no moisture will penetrate the opening.


  • Easy to install
  • Fitted above opening in roof felt
  • Guides moisture away from roof void

ideal for

  • Roof ventilation projects


Full installation details are available on request from the Technical Department.

FW1 Felt Weir Installation Instructions

1. Cut a slit in the felt, approximately 50mm above the batten

2. Slide the weir under the batten directly above the opening in the roofing membrane, inserting top of weir into slit above the batten

3. Nail the weir to the batten

4. Nail membrane over the batten in the normal way



Open/close panel Customer service

Get in touch

Contact our customer service team