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 Plywood Subroof Replacement:
After "tearing off" the old two layers of shingles and tarpaper, we get a good look at the
existing plywood. In this instance, penetrations in the roof were caused by a high-end
gutter guard system, which required fasteners that were actually screwed through the
shingles.
Every area is critical on a low-slope roof like this one -- and
that's why I'm against using any gutter guards that use screws that pierce the shingle
system. It just doesn't make sense to me, and you can see the resulting
damage below.
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