Remove Moss or Replace Roof? Your Choice.
The cousins to home renovations are home repair and maintenance. A person remodels a house because it’s no longer stylistically suitable; because it’s not meeting functional needs; or because major repairs need to be made, and it turns out easier in the end just to completely remodel the thing.
No one has ever replaced an otherwise functional roof simply because it doesn’t meet stylistic needs.
In most cases, roofs get replaced because they have reached the end of their natural lifespan or they have not been properly maintained.
If you maintain your roof well enough, you probably will not be replacing it. Have I driven the point home enough yet? I hope so, because now we’re going to kill some moss!
How Moss Will Destroy Your Roof
Moss develops in perennially shady areas in areas that tend to be cool and damp. You can live in a cool, damp area, but sections of the roof that get a couple of hours of sun per day may not develop moss. It’s that third factor–lack of sun–that promotes moss growth.
Moss begins as a thin green layer on the tops of the shingles. The areas between shingles and the shingles’ edges also get moss because they are even more shaded. See Picture Below
As moss thickens, it will get under the shingles, acting like a jack and raising and pushing them upward. It’s bad enough with asphalt or composite shingles, but if you have wood shingles it’s disastrous. Wood’s porous surface is prime real estate for moss growth. Once moss has adhered to wood shingles, it’s tougher to get off than the relatively smoother planes of composite or asphalt shingles.
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