Does Moss on a Roof Actually Matter?
More than most people think. Moss works like a sponge: it holds water against the tile surface, and when that water freezes it flakes and cracks the tiles — especially older concrete tiles. Clumps slide off and block gutters and valleys, and on heavily mossed roofs the extra trapped moisture can even reach the battens. A mossy roof isn't just cosmetic; it ages faster.
Which Roofs Grow It
North-facing pitches, roofs shaded by trees or taller buildings, and porous concrete tiles are the usual culprits — which describes a lot of terraced streets across E2, E3 and E14. If your neighbour's roof is green, yours is probably heading the same way.
How We Clean Roofs — and Why We Never Jet Wash
We remove moss by hand with scrapers and brushes, working off proper access, then treat the roof with a soft-wash biocide that kills the spores and keeps regrowth away for years. What we will not do is jet-wash your roof. High-pressure washing strips the weathered surface off tiles, forces water up under the laps and into the loft, and can void tile manufacturers' warranties. Plenty of outfits offer it cheap; the roof pays for it later.
What's Included
- Moss removed by hand from tiles, ridges, valleys and around chimneys
- Soft-wash biocide treatment to slow regrowth
- Gutters and valleys cleared of everything we've dislodged — see gutter cleaning
- Cracked or slipped tiles photographed and flagged, with a separate no-pressure quote — see roof repairs
- Before-and-after photos of the whole roof
What It Costs
Every roof is different, so we price on a quick look — but as a rough guide, a typical terrace roof clean and treatment is a few hundred pounds depending on pitch, access and how established the moss is. You'll get a fixed written price before we start. Call 020 4578 5836 for a free quote.