
Essential Rainwater Harvesting
The Permaculture Podcast
00:00
The Importance of Metal Roofs in Rainwater Harvesting Systems
The safest roof material like I said is basically smooth and metal but ironically Galvalume is one of the best roofing materials which ends up giving you a silver roof. The way that the tank works the biology in the tank specifically the biofilms and the sludge layer they actually act as bio remediation mechanisms. And so while the roof material is important to be smooth and ideally we try and find coatings that don't have heavy metals and any of those other toxins in them.
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