Cowls Caps and Birdguards

Chimney Cowls, Caps and Birdguards

A chimney cowl, cap or birdguard is usually a metal or ceramic object that is fitted to the chimney pot or flue with the fundamental purpose of improving the performance and reduce the risk of pests entering or damaging the flue.

The main reasons to fit a cowl, cap or birdguard

• The chimney is affected by ‘down-draught’; this is when air is being forced down the chimney, usually caused by wind flow.
• Birds nesting or entering the chimney – birds love nesting in chimneys and can return even if the nest has been removed.
• Rain entry – rain can cause damp issues or staining in the fireplace.
• Improve draught – the speed of which gasses are evacuated is vital. Some cowls are designed to improve the chimney draught.
• Cap a disused flue – if a fireplace is unused, it is a good idea to cap the top to stop heat loss and birds nesting or entering.

There are a huge selection of chimney cowls, caps and birdguards, the type of appliance will dictate the type of terminal that can be used. It is important to identify the fuel type of the appliance; most terminals are only suitable for certain fuels.