Moss Removal in Droitwich

Moss Off Without Harming the Tiles

Moss grows fastest on north-facing slopes and roofs shaded by trees, and concrete tiles with a rough surface suit it well. A little is mostly cosmetic, but thick cushions act like a sponge. They hold rainwater against the tiles, lift the bottom edges so wind-driven rain gets underneath, and break up when frost gets into them. Clumps then wash down and block gutters and downpipes, which brings its own problems.

Pressure washing is not always the right answer. A jet strong enough to shift moss also wears away the face of concrete tiles, and the rougher, thirstier surface left behind is easier for moss to recolonise. The spray can also drive water up under the laps into the loft, or crack older tiles. We look at the tiles first, then scrape and brush the moss off by hand, working down the roof, and bag what comes off rather than leaving it in the gutters.

Once the roof is clear, a biocide is applied in dry weather to kill the spores and roots left in the tile surface; it keeps working as rain washes it over the roof in the following weeks. We finish by clearing the gutters and checking for cracked or slipped tiles, which are much easier to spot on a clean roof. Any repair we make while we are up there is guaranteed for 10 years, so it stays our responsibility rather than yours.