Roof decay.
Air particles.
Bird shít.
Leaves.
Sand.
Cement.
All the above is collected over a wide area and funnelled into a trapped gully. They need cleaning out regularly. I do mine about twice a year.
Hopper overflow and water seeping under flagstones
- Thread starter Jeff543
- Start date
Air particles.
Bird shít.
Leaves.
Sand.
Cement.
All the above is collected over a wide area and funnelled into a trapped gully. They need cleaning out regularly. I do mine about twice a year.
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