Salt air, wet paving
Being right on the coast, Seaham gardens and driveways stay damp for long spells. That is ideal for green algae on paving and for the black spots that appear on flagged patios. Pressure washing lifts it, and the surface can be re-sanded and sealed so it holds up better against the next winter.
Houses facing the sea also tend to collect grime on fascias, soffits and conservatory roofs faster than those tucked inland. A soft wash deals with that without forcing water into seals or joints.

