this causes shingles to wear out prematurely and to wick moisture under the shingles causing nails to rust
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2
massive amounts of moss
Moss feeds off the moisture and the shingles. Causing them to break down, the granules to fall off, and the nails to rust from all the humidity between the shingles.
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3
rotten siding
As you can see, the siding is too close to the shingles, causing the wood siding to wick up moisture, causing it to rot and mold.
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4
shingles around dormer in bad shape
Lots of moss, lichen, algae, and mold are growing everywhere around the 2 dormers
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5
there are 2 layers of shingles on this house.
You can see I'm holding 4 layers of shingles. Each layer has 1 starter shingle and 1 primary shingle. With a total of 4 layers of shingles. 2 for each layer