Moss Thrives in Dark Wet Areas Winter is When Organic Matter Thrives

Slippery Moss

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What Time of Year Does Moss, Lichen and Mould Grow the Most?

Cladding Cleaning Hellmann Before

30th November 2021 General

Moss growth in Winter. What Time of Year Does Moss, Lichen and Mould Grow the Most?

One of the most common questions asked of exterior cleaning companies is about Moss growth in Winter.

Winter sees the most growth than any other season because it is generally darker at this time of year. Although growth continues at any time of year when it rains especially in shady dark or humid areas.

On dark stones, bricks, roof tiles and other hard surfaces these types of organic matter thrive in the darker days of Winter. Commonly known as Nostoc this type of Cyanobacteria is often mistakenly called gelatinous algae.

Mosses, lichens and moulds need moisture to thrive, and Winter provides excellent conditions for them here in the UK. This is due to plenty of rainy days and much shorter dark days when compared to Spring and Summer.

On homes the North facing elevations always have the highest level of organic matter growth and can be seen as darker green almost black shades.

Often one side of the roof will have heavier moss and lichen growth on it. When wet, moss becomes heavier and will often weigh more than a ton. Clumps often fall off into the gutters causing blockages.

When it is wet outside, driveways, paths and patios can become very slippery during the Autumn and Winter months.

Exterior cleaning companies often get asked is it better to leave outside cleaning work till March or April. The answer is no. You should be in the mindset of cleaning away all types of moulds, mosses and lichens as soon as you notice them. Better still an annual or bi-annual maintenance plan will keep all of your exterior surfaces free from slippery organic matter growth.

See other moss growth in winter explanations here 

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