What Causes Moss to Grow on a Roof?

When moss grows on the roof of a property it not only looks unsightly and ruins the aesthetic appeal of the exterior of your home, but it can also cause a lot of damage to the roof. The shingles on a roof offer a perfect environment for moss, algae and other fungi to grow as it is moist and humid. When combined with shade from trees and falling leaves, moss can thrive as it has all the nutrients it needs.

The reason moss can damage the roof is that it is holding in water in a sponge-like way which over a period of time can cause the shingles to crack. When the water freezes and thaws, the shingles will be pushed out of place causing leaks and rot on the roof. If moss is left to grow for a long period of time, it can cause expensive damage to a roof.

To prevent the growth of moss on a roof, maintenance and care such as clearing the gutters and cutting tree branches will stop it being able to thrive. The roof should also be well ventilated and provide air circulation in the loft area, as this will prevent condensation forming which can also lead to the growth of moss and fungus. If you already have some moss on the roof, it is best to bring in experts of roof cleaning Woking to remove it manually and then cover the roof with a biocide to prevent it re-growing.

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