Moss On Asphalt Shingle Roof

Moss growth will also interfere with proper drainage of water off the roof as water needs to trickle through or around the moss instead of running straight down to the gutters.

Moss on asphalt shingle roof. In severe cases moss build up can cause lateral water movement resulting in moisture damage to the roof deck or may even cause leaks. How to get rid of algae on the roof. Potassium salts of fatty acids applied using a hose end spray attachment. On an asphalt or possibly some treated wood shingle roofs shingle chemistry is also involved in moss lichens and algae growth or resistance to it.

The seams between the shingles and the shingles edges also develop moss because they tend to be especially shaded. Unlike algae moss can be detrimental to asphalt shingle performance. Moss loves moisture humidity and darkness. Hose off and brush all moss loose from your roof shingles.

The resulting constant exposure to water can degrade shingles. Moss can cause the leading edges of the shingles to lift or curl which increases the risk of shingle blow off during wind events. The black mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae gloeocapsa magma. Moss can be physically removed from the roof by hand.

If you live in an area with lots of shade from trees and buildings the moss can thrive even more. The asphalt roofing manufacturers association distinguishes between moss a plant with leaves that can grow into thick clumps and mold and mildew which are common names for types of algae that. Moss is common in rainy environments because it loves moisture but it also loves humidity and many roofs are humid because of heat escaping the house sunlight hitting the roof and so forth. For large expanses of an asphalt shingled roof use a long handled scrub brush made for cleaning gutters and roofs.

This thin layer on the top of the shingles expands and becomes wide thick and mat like. Carefully place a ladder near the area of moss growth and don slip resistant shoes old clothes rubber gloves and eye. It s a tedious job but it is easier on the tiles than more invasive techniques. Spray the moss covered roof with a moss control product or sprinkle the material on depending on the product formulation.

Moss on a roof begins with a thin dusting of green that you may notice only from low angles. Commonly found in climates with warm humid summers it does no damage to the roofing but it certainly does looks bad.