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Green Roof Technology Blog

Solar Living Roofs

Thursday, December 15, 2011

By Kat Harrold


Photo courtesy of Optigrun

Roofs offer a variety of uses other than just keeping your house safe and dry.  If your not using your roof for open space or a place to watch fireworks on the 4th of July, one of the best ways to utilize this space is to add a green roof with solar panels.  While the green roof can provide excellent stormwater management, protect your roof, and keep you building cooler in the summer it can also host solar panels.  The cooling benefits that your building and surrounding environment enjoy also prevents the solar panels from overheating, allowing them to run more efficiently during summer's scorching months.

The main concerns about combing the two were damage to the green roof during installation of the solar panels as well as roof penetrations.  Fortunately there is a solution.  Using the latest in solar/green roof technology, this drainage board also acts as a stand for the solar panel.  Instead of punching a hole through your roof to secure the solar panel, it attaches to the drainage board which uses the green roof as ballast to keep it in place during high wind events.  

Similar to the set up of a regular extensive system, you have you protection mat over the waterproofing followed by the drainage board.  The combined drainage board captures water like a regular drainage board and has a gravel strip area underneath the drip area.  A filter fabric covers the top of the drainage board and a capillary mat moves excess water out of the gravel strip reservoir and into the rest of the drainage board where the vegetation can absorb it.

For more details and images on how this set up works visit our solar page.    

 

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