Roof Moss Removal

Manual scraping or biocide only?

For most roofs, a biocide-only softwash is enough. The biocide kills the moss, algae and lichen, and rain washes the dead growth away over the following weeks. Because the result builds slowly, the roof keeps improving for some time after we leave.

Heavy, established moss is a different case. This is common on north-facing slopes that nobody has treated. A thick mat can stop the biocide from reaching the tile, so we scrape off the bulk first. As a result, the treatment works on the tile surface and the visible clean comes sooner.

Scraping alone is rarely enough, though. It removes the growth you can see but does not treat the surface left behind. The RHS notes that many mosses favour damp, shady conditions, so regrowth is likely if those conditions remain. That is why we follow every scrape with a biocide treatment.

Is moss really a problem?

We would rather be straight with you. The National Federation of Roofing Contractors (NFRC) says moss on roof tiles is rarely a problem, and only needs removing if it blocks gutters, outlets and other drainage points. It also warns people to treat claims about roof life with caution unless they have credible third-party backing.

So we do not promise a longer roof life. We recommend moss removal when the growth is heavy, when it sheds into your gutters, or when you want the roof to look cared for. Our post on whether roof moss harms your house looks at the evidence, and DIY roof moss removal explains what to weigh up before you try it yourself.

Moss is not the only growth on a roof, and our article on lichen on roof tiles covers a different one.

How we remove moss safely

The tile maker Wienerberger suggests removing moss by hand with a trowel or stiff brush, on a dry day when the moss is less wet and comes away more easily. We follow the same idea with long-handled, flexible tools. We work from roof ladders, because the NFRC warns that unnecessary foot traffic often leads to cracked or broken tiles.

Wienerberger also says moss treatments need ongoing maintenance. A treated roof in a damp or shaded spot may need a top-up sooner than one in the open, since those conditions feed regrowth. We explain this at survey, and we record it in your photo report.

What's included in a moss removal treatment

• Free pre-job survey and moss depth assessment
• Manual scraping of all heavy moss using specialist long-handled tools (no walking on tiles)
• Debris collected and bagged, not left in gutters or on the ground
• Full soft wash biocide application across the entire roof surface
• Gutter clearance of residual debris
• Before/after photo report
• Written 5-year regrowth protection guarantee

Where we remove moss

We work across Kent, Surrey and Sussex. For example, our team handles roof moss removal in Tunbridge Wells, roof moss removal in Farnham and roof moss removal in Lewes. If your roof only has a light covering, our soft wash roof cleaning may be all you need.

Pricing

Heavy scraping adds time and labour to the standard softwash price. The survey shows us whether scraping helps before we quote. Most properties do not need it, because a biocide-only softwash suits light to moderate coverage.