We recently had our roof reshingled. Our neighbor says that we should
add zinc strips to prevent moss from accumulating. Also he says that he
sprinkles something called Moss-Out (a zinc based product) on the
shingles for the same purpose. We live in Western Washington where it
rains a lot. Should we follow his advice? He had 25 year shingles put
on his roof whereas we chose 40 year. Don't know if that makes any
difference.