I find moss growth starts within a few years of installing a new composition roof.
Moss starting to grow on roof green slime.
Without an organic material on your roof the moss would not be able to stick long enough to grow.
If you notice that the surface of your seed starting mix is turning green you probably have green algae growth.
Mosses are nonparasitic primitive green plants that have fine branched threadlike stems with tiny leaves.
Mosses typically form a thick green mat on the soil surface.
Moss is most problematic on composition roofs which are the most commonly installed roofs in this region.
Even though algae itself does not damage the structural stability of the cement or concrete it can still cause troublesome problems.
This thin layer on the top of the shingles expands and becomes wide thick and mat like.
Moss spores are tiny enough to get carried up to the roof by the wind.
Spores can also hitch rides on animals and birds or drop from nearby tree branches where it may be growing.
Learn the cause and how to remove it.
Wet the moss by spraying with your hose.
They reproduce by means of wind blown spores.
Many homes in humid climates are constantly battling algae and fungus growth.
This 15 year old metal roof has no moss build up.
They produce their own food and do not kill grass plants but rather fill in the spaces in the lawn where grass is not growing.
Moss does not have roots but it does need something organic to grow on.
There are several commercially available moss and algae control products available at hardware stores and garden centers.
Clearing the moss from your roof is easy and only takes a few simple steps.
Create a 50 50 mixture of chlorine bleach and water and spray it generously on the moss.
Unfortunately there is a risk that the algae will be distributed to other parts of the lawn during the aeration process.
Hello wood rot and leaks.
Green algae will begin to grow on cement or concrete when the surface stays constantly damp.
The most vulnerable aspects of the roof are the north face and sections of roof shaded by overhanging trees.
Moss starts as a thin green layer on and between shingles but then it proceeds to lift those shingles up as it grows allowing water to seep underneath.
The seams between the shingles and the shingles edges also develop moss because they tend to be especially shaded.
Moss which tends to appear on areas of roofs that are shaded by trees and on north facing slopes is sometimes killed and re invasions prevented by simply correcting the shady humid conditions.
Use a low pressure setting on your spray nozzle to avoid damaging your shingles.
