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Media  Media selection is critical to the success of a green roof. Considerations include weight, stability, water holding capacity, and hydraulic conductivity. Most lightweight commercial media combine a lightweight aggregate like expanded clay, slate or shale (80-90% by volume) with organic compost (10-20% by volume). For extensive green roofs using commercially available lightweight media, the optimal media depth is 3.5" - 4.5". This gives the best balance when considering the necessary structural strength of the building, the cost of media and vegetation, the moisture holding capacity (stormwater management) , and maintenance requirements. If the building can support greater weight less costly materials like fine gravel and sand can be used. In either case the media should be tested and meet FLL guidelines for the type of roof. A helpful resource concerning green roof media can be found here. |
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Benefits
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Hyload Waterproofing Systems
— Phone: (330) 769-3546 - Toll Free: (800) 457-4056 - Fax: (330)
769-4153 Web Site Design and Web Site Hosting by Flash Avenue - York, PA |
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