Black algae

Old 02-25-24, 03:56 AM
Geochurchi's Avatar
Thread Starter
Join Date: Nov 2012
Posts: 5,086
Received 161 Upvotes on 147 Posts
Black algae

Good morning. Looking for opinions on how best to deal with these black streaks, 5 buildings are involved in SW Florida , lite color shingles, roofs are approximately 6 years old
Thanks for your input.
Old 02-25-24, 04:31 AM
Group Moderator
Join Date: Mar 2003
Location: NC, USA
Posts: 27,979
Received 2,229 Upvotes on 1,988 Posts
I have used chlorine and copper based algae & mildew treatments that worked well. There are also building wash concentrates intended for use when pressure or soft washing houses that are pretty effective.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: