Posted 11/22/2022 20:18 (#9945300 - in reply to #9945291) Subject: RE: Shed roof getting algae & mold
mn
I'm not sure if it works on steel roofs or not, but for shingle roofs there is a zinc(?) Strip you can put all the way along the ridge. When it rains the water carries a tiny bit of that zinc down the roof and prevents the mold/algae from ever forming.