Why crows choose chimneys
To a jackdaw, an open chimney pot looks like a sheltered hollow tree. They drop sticks in until a platform forms, then build a nest on top. Over a season this can pack a flue with material.
How a crow guard works
The Allgrip Crow Guard has wavy steel legs that grip the inside of the pot and a flat top cover that sits above it. The gaps keep large birds out while letting the chimney breathe, and the cover helps shed rain.
When a crow guard isn't the right choice
Crow guards are generally suited to open fireplaces and disused chimneys with standard round pots. Stoves, gas appliances and lined flues often need a different terminal. We check this before fitting.
