Roof cleaning and moss removal in Teesside
Roof cleaning in Teesside costs £8 to £15/m² using soft washing: moss is scraped or steam-loosened, then a biocide treatment kills regrowth at the root. High pressure should never be used on roof tiles, it strips the surface, forces water under the laps and voids tile warranties.
Why roofs here grow so much moss
Teesside's climate is close to perfect for roof moss: mild, damp, with long wet winters and enough shade on north and east-facing slopes that tiles stay wet for days. Concrete tiles, standard on the 1930s semis of Acklam, Linthorpe and Hartburn and the post-war estates of Billingham, are more porous than slate and colonise fastest. Left alone, moss holds moisture against the tile, and in a freeze it expands and spalls the tile face. It also rolls off into gutters and blocks them, which is how a mossy roof becomes a damp wall.
Never let anyone pressure wash your roof
This is the single most important sentence on this page. High-pressure washing a roof strips the protective granular face off concrete tiles, forces water up under the laps into the loft, can crack older brittle tiles, and voids most tile manufacturers' warranties. A pressure-washed roof looks clean for a season and then degrades faster than before, because the roughened surface holds more moisture and more moss. Any contractor who reaches for a lance on a pitched roof should be sent away.
How a roof is cleaned properly
The professional method is soft washing. First the bulk moss is removed by hand with profiled scrapers matched to the tile shape, or with low-pressure steam on fragile roofs. Then a biocide treatment is applied at low pressure. The biocide soaks into the tile, kills the remaining spores, lichen and algae at the root, and keeps working for 12 months or more as residual growth dies off and weathers away. The roof looks dramatically better immediately and keeps improving over the following months.
Access is usually by scaffold tower or from the ladder line with the right reach equipment; walking directly on tiles is avoided wherever possible because that is how tiles get cracked. Gutters are cleared as part of the job, since the moss has to go somewhere.
Prices on Teesside
Expect £8 to £15/m² of roof area, so a typical semi-detached roof of 60 to 80m² quotes between £500 and £1,200 depending on pitch, access, moss depth and whether scaffolding is needed. Detached Wynyard and Ingleby Barwick houses with complex rooflines sit at the upper end. Treat it as a five-to-ten-year job: with the biocide working, moss takes years to re-establish, unlike a scrape-only clean which can regrow within two seasons.