Why Shrewsbury roofs grow moss faster
The Severn valley microclimate creates two conditions ideal for moss growth: persistent atmospheric moisture and limited drying time on shaded north-facing pitches. Properties near The Quarry park and the riverside walkways benefit from high tree canopy, which keeps roofs shaded and damp for longer. This is particularly evident in Castlefields and Kingsland where many north-facing pitches receive direct sunlight for less than two hours a day in winter.
Soft wash — the correct method for period tiles
High-pressure washing forces water under tiles, saturates the roof deck and can break down pointing on ridge and verge mortar. For Shrewsbury’s clay peg tile and Welsh slate stock, soft wash biocide treatment is the only correct approach. A low-pressure biocide application kills moss at the root, allows it to die back naturally over 2–4 weeks, and is followed by a light rinse. No tile damage, no structural risk.
What we cover
- Soft wash moss and lichen removal (no pressure washing)
- Biocide treatment — kills moss at the root
- Gutter clearing as part of the treatment
- Roof sealing and protective coating available
- Moss prevention treatments with 5-year efficacy
- Full roof inspection included with treatment