If one part of your garden is always green and the rest isn't, the surface material usually isn't the reason. Aspect, shade and drainage are.
Cleaning fixes today. The notes below are about slowing down the return.
Why it happens
- North-facing and wall-shaded surfaces get little direct sun, so they never dry fully.
- Overhanging trees and hedges drop organic matter that decomposes into a thin growing layer.
- Poor falls hold thin films of water where algae establish first.
- Damp joints wick moisture up into the paving surface from below.
Practical things that genuinely help
- Cut back overhanging planting to get more light and airflow onto the surface.
- Sweep leaf litter in autumn rather than letting it break down in place.
- Clear gullies and check that water actually runs off rather than pooling.
- Move planters periodically so you don't get permanent damp rings.
- Have a biocide treatment applied on a maintenance cycle rather than waiting for a full re-clean.
Realistic expectations
A shaded terrace will always need attention more often than a sunny one. Rather than a big clean every few years, a lighter maintenance treatment on a shorter cycle usually costs less overall and never lets the surface get bad.
Our promise
100% satisfaction — or we re-clean free.