Moss on a Bristol roof isn't just cosmetic — it lifts tiles, blocks gutters and shortens the life of the whole roof. We clear it the safe way and treat it so it doesn't grow back. We cover every BS postcode across Bristol and the wider South West England. Roofs round here see wet Atlantic winters that drive heavy moss growth on north-facing slopes, and most of the properties we treat are built with Victorian double-Roman clay, Bridgwater pantiles and modern concrete interlocking tiles — so we tune the soft-wash mix and dwell time to whatever's on your ridge.
Most of the roofs we treat around Bristol are built with Victorian double-Roman clay, Bridgwater pantiles and modern concrete interlocking tiles. Each tile type needs a slightly different approach — concrete tiles need a gentler biocide dwell time than slate, and pantiles need careful scraping in the lap. Here's what's included on a typical Bristol job:
Every tile cleared by hand from a roof ladder or scaffold tower — no pressure washers, no broken tiles. The right approach for the older roofs you see across Bristol.
Professional biocide applied at low pressure. It kills moss, algae and lichen at the root and keeps working for months — important given the wet Atlantic winters that drive heavy moss growth on north-facing slopes.
Gutters cleared, downpipes flushed, debris bagged and taken away. Included on every Bristol roof clean.
Photos of every slope, ridge and valley. You'll see exactly what's on your roof before we quote — no pressure.
We re-bed loose ridge tiles and flag failing pointing while we're up there. Small fixes done on the day; bigger ones quoted separately.
Optional annual top-up applied from the ground. Stretches results from "several years" to "indefinitely" with minimal cost.
The short answer: wet Atlantic winters that drive heavy moss growth on north-facing slopes. Moss spores are airborne almost year-round, and any roof slope that stays damp for long periods will start to colonise — usually on the north-facing pitch first, then under any overhanging trees.
Around Bristol, the combination of Victorian double-Roman clay, Bridgwater pantiles and modern concrete interlocking tiles and South West England's climate means most roofs need attention every 3-5 years if they've never been treated, and far less often once a biocide programme is in place.
Left untreated, moss holds water against the tile surface, freezes and thaws through winter, lifts the lap, and eventually pushes debris into the gutter line. That's when small problems become roof-replacement problems.
Plus every BS postcode across South West England.
Yes. We use a professional, fully biodegradable biocide. We mask off planting where needed and flush gutters and downpipes once we're finished.
Never. High-pressure water strips the protective coating off concrete tiles and forces water under slate. We hand-scrape and soft-wash only — that's the only safe way to clean a roof.
After a full scrape, soft-wash and biocide treatment, most roofs in Bristol stay visibly clear for several years. An optional annual top-up biocide stretches that further.
Most Bristol jobs are priced from the ground after a free roof inspection — pitch, access and tile type matter far more than property size. You'll get a written, fixed-price quote with no obligation.
Yes. We clean carefully around PV panels and mounting brackets and avoid running biocide over the cells.