Professional roof cleaning and moss removal across West Glamorgan. Free quotes.
Call 07476 888638 for a free, no-obligation quote. Available Mon–Sun, 9am–6pm.
Moss, algae, lichen and dirt build-up on your roof doesn't just look bad — it traps moisture, lifts tiles and accelerates decay. Johnson's Roofing provides professional roof cleaning services across West Glamorgan, restoring your roof's appearance and extending its lifespan with safe, effective treatments.
We use low-pressure washing techniques that safely remove moss, algae and dirt without damaging your tiles or slate. After cleaning, we apply a professional biocide treatment that kills remaining spores and prevents regrowth for years. We also clear all gutters and downpipes of debris dislodged during the clean.
We don't use high-pressure washing on roofs — it can damage tiles and force water under the surface. We use controlled low-pressure methods that are safe and effective.
Every 3-5 years is usually sufficient, depending on how quickly moss returns. Our biocide treatment slows regrowth significantly.
Yes — moss roots grow into mortar joints and under tile edges, lifting tiles and creating pathways for water. Left untreated, it causes leaks and expensive damage.
We clean concrete tiles, clay tiles, slate roofs, flat roofs and more. We adjust our method and pressure to suit each material.