Once the spores get on the roof they gather in the spaces between shingles and grow into thick spongy moss.
Moss growing on shingles of roof.
Hello wood rot and leaks.
The resulting constant exposure to water can degrade shingles.
Since moss thrives in damp environments areas of the roof that get the least amount of direct sunlight like north facing sections or areas shaded by tree limbs make an ideal place for it to grow.
The seams between the shingles and the shingles edges also develop moss because they tend to be especially shaded.
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.
This moisture increases the weight of the roof which increases the risk of collapse decay leaks and water damage.
By holding moisture against the roof surface lichens but more so moss speed the wear of the asphalt shingle surface in freezing climates by increasing frost damage to the mineral granule coating on the shingles.
Moss and lichens are more than a cosmetic issue on many kinds of roofing materials asphalt shingles roll roofing wood shingle roofs wood shake roofs.
This lack of drainage not only helps the moss grow and thrive but also may damage your roof because it increases the risk of water getting under the shingles.
Once under the shingles the moisture can reach the underlying structure.
Over time moss can also work its way under shingles lifting them up.
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 a roof begins with a thin dusting of green that you may notice only from low angles.
You can apply the copper solution to new roofs to prevent any growth for a number of years.
It helps keep your roof wet by storing moisture and preventing proper drainage.
Moss growing on a roof may or may not be considered attractive or quaint but there is no doubt that extensive moss on a roof can seriously damage the roof by growing under and raising or loosening.
Moss and green algae require dead organic matter for nutrients so you can prevent their growth by blowing off the shingles to remove junk from trees that tend to accumulate between the tabs.