Can you see green patches on your roof tiles, paving stones or fa\u00e7ade? If so, you\u2019re in good company \u2013 and fortunately, it\u2019s easier to deal with than most people think. You don\u2019t need to scrub or use a high-pressure washer. This guide shows you how to remove moss and lichen using a concentrated cleaning agent, which sprayer is best for the job, and how to avoid the most common mistakes.<\/p>\n\n\n\n
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Does the moss actually do any harm?<\/h2>\n\n\n\n
Yes, unfortunately. Moss and vegetation act like a sponge, trapping moisture against the surface. On roofs, this increases the risk of frost damage<\/strong> and a shorter lifespan for the roof tiles, because the water freezes and expands within the pores. The roots also work their way down into the surface and gradually break it up.<\/p>\n\n\n\nOn paving stones, steps and terraces, the problem is a different one: moss makes the surface slippery and dangerous<\/strong> when it rains. And on building fa\u00e7ades, it detracts from the appearance long before it actually causes any damage. What all three have in common is that it is far cheaper to treat the problem than to leave it.<\/p>\n\n\n\n<\/div>\n\n\n\n
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Typical places you should check<\/strong><\/p>\n\n- The north side of the roof and everything in the shade<\/li>\n
- Paving stones and steps \u2013 where it gets slippery in autumn<\/li>\n
- Joints, edges and transitions where water collects<\/li>\n
- Gravestones, walls and pots<\/li>\n<\/ul>\n<\/div>\n\n\n\n
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How to remove moss \u2013 without scrubbing<\/h2>\n\n\n\n
You don\u2019t need to climb onto the roof with a broom. You simply apply a cleaning agent mixed with water, leave it to work \u2013 and let nature do the rest. The moss and roots gradually dry out and die, and the rain and wind will wash away the dead moss over time. No scrubbing, no high-pressure hosing.<\/p>\n\n\n\n
That is also why the method is gentle: High pressure often strips away the surface of the roof tiles<\/strong> and makes it more susceptible to new fouling than before. Chemical treatment only attacks the fouling.<\/p>\n\n\n\n<\/div>\n\n\n\n
\n- Mix the concentrate with water<\/strong> \u2013 10\u201350 ml per litre, depending on how heavy the fouling is.<\/li>\n\n\n\n
- Apply evenly to a dry surface<\/strong> using a low-pressure sprayer or a pump sprayer.<\/li>\n\n\n\n
- Leave the product to take effect.<\/strong> In the case of moss and foliage, it should not normally be rinsed off.<\/li>\n\n\n\n
- Let nature take care of the rest<\/strong> \u2013 rain and the weather wash away the dead moss.<\/li>\n<\/ol>\n\n\n\n
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Choose the correct dosage<\/strong><\/p>\n\n- Light greening and prevention \u2192 10\u201320 ml per litre<\/strong><\/li>\n
- Moderate fouling \u2192 20\u201335 ml per litre<\/strong><\/li>\n
- Thick, old moss \u2192 35\u201350 ml per litre<\/strong><\/li>\n<\/ul>\n<\/div>\n\n\n\n
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Tips from professionals<\/strong><\/p>\n\n- Always test on a small, inconspicuous area first \u2013 particularly on painted surfaces and aluminium.<\/li>\n
- Cover any plants and vegetation beneath the work area, and water them thoroughly afterwards.<\/li>\n
- Don\u2019t rush to judge the results. The full effect takes weeks and months to become apparent, not hours.<\/li>\n<\/ul>\n<\/div>\n\n\n\n
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