Gutter Leaf Guard
Leaf guards are widely marketed as a way to prevent the buildup of vegetable matter in spouting. They may achieve this objective, but instead they often result in a build-up of a plant material poultice on the eaves line of the roof.
That can cause premature corrosion of the roof by chemical reaction, greatly increased time of wetness, and prevention of adequate ventilation of the underside of the cladding.
The COP recommends against the installation of such products. Alternative solutions include fitting a durable spouting material such as copper, installing rain heads with a leaf trap, or installing a proprietary leaf-proof spouting system.
A printable bulletin concerning proprietary leaf guards is available at: BGLG01 Using Propietary Leaf Guards.
Extract:
"Leaf guards are widely marketed as a way to prevent the build-up of vegetable matter in spouting.
They may achieve this objective, but they often result in a build-up of a plant material poultice on the
eaves line of the roof which can cause premature corrosion of the roof by chemical reaction, greatly
increased time of wetness, and prevention of adequate ventilation of the underside of the cladding."
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