Pitched roofs shed debris. Flat roofs and valleys collect it, and that difference is behind a large share of the leaks people blame on the covering itself.
Why debris matters more here
A blocked valley makes water back up under the tile courses on both sides. A flat roof outlet packed with moss holds a pond that finds every weak seam.
This guide sits under our Roof Cleaning work, covering 20-mile radius of Plymouth.
Membrane-safe clearing
Felt, EPDM and GRP all mark or tear under a lance and under a scraper edge. Clearing is done by hand and by vacuum, then rinsed at low pressure.
Checking while we are there
We photograph outlets, upstands and seams as we go, so you have a record of what was there and what condition it was in.
Questions we get on this
- Do you repair flat roofs?
- No. We clear and report; repairs are for a roofer.
- How often should a valley be cleared?
- Annually where there are trees, otherwise every couple of years.
- Can you reach a rear flat roof extension?
- Usually, subject to safe access. We will confirm at quote stage.
Related reading
- Weeds and moss in driveway joints
- Oil and tyre marks on driveways
- After a storm: what to check outside the house
- Preparing the outside of a house for sale