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MedO Green Roof

MedO Green Roof Systems

MedO GM40 Biodiverse Substrate


Radmat GM40 Biodiverse Substrate provides a suitable growing medium to create a habitat in synchronisation with the surrounding local area, offering ideal conditions for invertibrates, animal species, colonisation by airborne plants and/or the majority of species used in biodiverse green roofing applications including ‘brown’ roofs. Consisting of recycled 14-5mm crushed brick, 4-10mm lightweight clay aggregate fine grade pine bark and composted recycled material (certified to PAS 100) all the materials used within its manufacture are responsibly sourced recycled materials of origin within the United Kingdom. 100% recycled material free from phytotoxic contaminants, all components are sourced with a strict identifiable provenance within a fifty mile radius of the manufacturing site, ensuring no contamination from invasive plant species such as Japanese Knotweed or Himalayan Balsam. Compliant with GRO substrate guidelines.


Mixed pre-grown wildflower and sedum plugs or pre-grown wildflower and sedum blanket. Install GM40 Biodiverse Substrate medium on either Radmat D25 or D40 drainage/reservoir board covered with G11 filter fleece in accordance with the Radmat specification.


Apply to a depth as specified according to plant type allowing 10% post instalaltion settlement. Indicative substrate depths are given in the table below, however the specified depth will vary based on a variety of factors including design load, building location, building height, plant species etc. It is therefore important to consult the project specification.

Description Value
Composition Reycled bricks/clay agg.
Bulk Density – dry 800-900 to kg/m3
Bulk Density – max water content 1125 to kg/m3
Drainage Board Radmat D25/D40
Filter Fleece Radmat G11
Delivery Form 1.25m³ Bulk Bags/25 litre Sacks/Pallet

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