Moss looks harmless, but it's one of the most underestimated threats to a British roof. It holds moisture against the tiles, and in winter that trapped water freezes, expands and slowly cracks the surface of the tile. Over time this leads to porous tiles, leaks and premature failure.
Moss also breaks away in clumps and washes into the gutters, blocking them and causing water to back up under the tiles or spill down the walls. If your gutters overflow every time it rains, moss is often the culprit.
The key is safe removal. Aggressive jet-washing can strip the protective surface off tiles and force water under them — doing more harm than good. We remove moss carefully by hand and with the right tools, clear the gutters, and can apply a biocide treatment that keeps regrowth at bay for far longer.
A clean, moss-free roof simply lasts longer. If your tiles are looking green, book a free roof-health check with Armstrong Roofing and we'll advise on the safest way to protect them.
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