Bird nests and droppings not only look unsightly, they also erode building fabric through direct chemical action, contaminate water sources by blocking drains and gutters and, if ignored, can result in a dangerous build-up of poisonous gases in chimneys and flues.
The health risks to staff and the general public should also not be underestimated - bird droppings are a virulent source of disease organisms and provide a fertile breeding ground for insects.
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