Why does moss grow on my roof?

Answer by  loribugher (462)

Moss will grow in areas of high humidity and shade. Your roof must be shaded. Normally, moss on a roof is a bad thing, you have too much moisture there.

Answer by  trigonometry (668)

Well, moss can grow on rocks. The surface of your roof is similar to this. Additionally they need humidity. Once a bit of dust, dirt or leaves has collected on top of your roof, they capture humidity in form of rain and allow moss to grow. From that point on the moss stores collects rain itself.

Answer by  champaign9497 (11977)

Usually what will make moss grow on the roof is when the roof is moist and shaded all of the time for more information on the subject you can do an online search and all of the information is printable so you can put it in your files for future use.

Answer by  bigwig (654)

Moss loves places that are moist and porous. If your roof does not drain well or is made of older material, it will likely grow moss.

Answer by  terry82 (191)

Moss will grow when the spores land in an area that is continual wet or moist and where they can root. The best way to eliminate it is by finding out why the area is damp and repairing it. You likely have a slight dip in the roof which retains a small amount of water probably in a shaded area.

Answer by  conservit (6)

Moss needs a bed to grow on this is usually formed from dust, pollens and pollutants in the air. Algae will form first, this gives a sticky surface for more dirt to cling too and then hold moisture. Moss will quickly follow.

Answer by  case (1261)

Moss grows on moist and shading areas. My guess your roof is an ideal place for the moss to grow. I would have a professional roofer look at your roof because it may holding moisture which will lead to big roof problems in the future.

Answer by  thewindrose (642)

Moss grows in low light and damp conditions. You probably have overhanging trees that provide shade and are dropping leaves that is providing compost and a home for the moss.

Answer by  kendall (95)

Moss will grow anywhere there is moisture and shade. If your roof has partial shade and mositure from rain water this can cause moss to grow.

Answer by  SIDDHU (861)

Moss grows up on the roof due to dampness and humidity. It usually grows in places where temperature is over freezing. Moss actually dont have roots and they need moist conditions to survive. Sometimes the roof becomes slippery and our foot slips.