A roof brought back before the rains
Low-pressure washing, replacement of cracked tiles and ridge repairs on a roof that was already letting water in.
The roof had moss established across the whole north-facing slope and a number of cracked tiles at the eaves. There was already a damp stain on the ceiling of one of the rooms, which usually means water has been getting in for considerably longer than the owner thinks.
The washing was done at low pressure. It is a decision we always explain: a pressure washer cleans faster, but it cracks aged tiles, strips the ridge mortar and forces water underneath. You end up with a good-looking roof and a new leak.
After cleaning we replaced the cracked tiles with compatible pieces, remade the ridge mortar and treated the junctions against the walls, which were the likely source of the leak. We finished by applying a biocide across the whole surface, to hold the moss off for several years.