Roof Cleaning London

Smart Exterior Cleaning provide roof cleaning services in and around London and Hertfordshire. We provide a soft wash roof cleaning service, which cleans your roof effectively without causing damage. The soft wash roof cleaning solution effectively kills the moss, lichen and algae that grow on your roof, leaving it clean for years to come.


Pressure washing roof tiles can permanently damage them, force high volumes of water into your loft space, dislodge loose tiles and scatter dangerous debris. Instead, we use a safe, soft clean process. This leaves your roof looking brilliant without causing damage.

Our Safe, SoftClean Roof Cleaning Process

Our first priority is to manually remove as much organic material from the roof tiles as possible. This is done using specialist roof tile scrapers, which are sized and shaped for the particular tile type of your roof. Perfection is not essential, as the later treatments will purge the tiles of any remaining material.

The roof is now rinsed to remove any loose remnants and to dampen the tiles. This enhances the absorption of the AlgoClear Pro roof cleaning solution.

We use AlgoClear Pro SoftClean. This solution has been developed especially for the treatment of roofs, walls and general amenity. It is non-aggressive in nature and does not contain bleach. AlgoClear Pro SoftClean will not degrade leadwork, aluminium or tile fixings. Furthermore, the solution does not affect any known construction material, and has a rapid breakdown rate after use, leaving residues that are absorbed by bacteria. It kills 99.9% of the microbial life and is a potent algaecide. It kills moss and lichen, which tend to harbour algae.

The product begins to work immediately and the initial phase (killing the biofilm) is substantially completed within thirty minutes. The weather will do the rest. The speed of cleansing is by and large in relation to the site exposure and to a degree the type of contaminant. Different contaminants will shed at different rates: Moss remnants will quickly decay and disperse. White and yellow lichen will also die within a short period and begin to detach.

When Should You Have Your Roof Re-Sprayed?

On roofs, some light green can re-appear about 4 years after treatment if the building is situated in a moist environment. Moss takes a long time to come back. Roof cleaning is recommended by the manufacturer of AlgoClear Pro to be carried out every 10 years.

The Soft Wash Roof Cleaning Process

The photos below illustrate the soft wash roof cleaning process. We use this process to protect your roof tiles and loft space from damage that would be caused by pressure washing. As you can see, our soft wash roof cleaning process leaves roofs clean and free from debris, moss and algae.

We Are Proud to Use AlgoClear Pro SoftClean

Contact Us For A Roof Cleaning Quote

From our base in Hillingdon, we serve London, Hertfordshire, Buckinghamshire and the surrounding area. Our London roof cleaning service is available to domestic and commercial premises. Contact Smart Exterior Cleaning on 01895 875 662 or email for more information and to obtain a quote.