Sorry, I posted this to the wrong group so here is a repost.
I need to re-roof a couple of sheds. They have heavy moss on the
north side. Can I just scrape off the moss and lay new shingles or
does something more need to be done? Single layer, no tear-off.
Personally I would do a tear off. Get that trash out of there to allow
for a better, longer lasting job.
Other than that, I suggest a power washer. You may want to spay it with
bleach a day or two before to kill it off and then after the power wash as
well to kill off anything left.
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