Preston roofing guide
Roof Mortar and Pointing Repairs in Preston
Mortar appears at chimneys, ridges and verges, but those areas do different jobs.

Weathering is not the same as movement
A rough joint can remain secure.
Preparation decides how well new mortar holds
Loose material needs removing before repointing.
Older masonry may need a softer mix
Very hard cement can be unsuitable on softer traditional brickwork.
Want the roof looked at?
Tell the roofer what you have seen and what the weather was like when it happened. If you can take a photograph safely from the ground, include one that shows the whole area of roof.
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