Work out where the repair sits
A continuous roof slope can make the boundary between houses difficult to judge from below.
Drainage can affect more than one house
A blocked gutter or outlet may back water up along the row.
Stone and slate are part of the local housing stock
Historic England records late eighteenth and early nineteenth-century Rochdale cottages and weavers' houses built in watershot stone with stone slate or slate roofs.
Want the problem checked properly?
If you have a photograph from safe ground, include one that shows the whole area rather than only a close-up.
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