Hayling Island sits at the mouth of Langstone and Chichester harbours with almost no natural windbreak — the combination of salt air, wind-driven rain from three sides, and near-constant humidity through the winter months makes it one of the fastest algae-fouling roof environments in Hampshire. What’s a shaded-slope problem inland is a whole-roof problem here. Most Hayling properties benefit from a clean every 4–5 years rather than the 6–8 typical inland — and the roof will look better for longer if a full biocide treatment is included.
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