Lightweight Systems, Sedum and Wildflower roofs

Extensive Green roofs are designed to be low maintenance, lightweight systems with no general access. Typically they have thin layers of substrate, the growing medium, to keep depth and weight to a minimum.
The most drought tolerant planting, and therefore the thinest and lightest system, uses sedum plant species. Bauder's XF301 is the lightest GRO compliant system on the market.

Extensive green roofs are delivered for a variety of reasons, with a popular reason being for biodiversity and meeting a BAP.

So, what is the primary purpose for your green roof?

In many instances an extensive green roof can be a planning requisite and the ideal solution is the simplest, lightweight sedum blanket system.  Other options are substrate-based systems that are plug planted to the client's requirement or seeded for natural colonisation

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