BMI Canopia ST Sedum Mat - Extensive Green Roof System

A lightweight extensive green roof system utilising a pre-grown vegetation mat of 8 – 12 sedum species. Provides an immediate green planting scheme for instant impact. The vegetation mat is installed on a shallow depth of specially formulated free-draining substrate and drainage board.

Sedum-Mat-Extensive-Green-Roof-System1. BMI Canopia Extensive Sedum Mat

2. BMI Canopia Extensive Sedum         Substrate

3. BMI Canopia Filter Fleece 

4. BMI Canopia Drainage Board 20 FF

5. BMI Canopia Protection Fleece

6. BMI Waterproofing System



System Properties
The following data relates to the extensive green roof element only.
System Dry Weight: 80 kg/m²  
System Saturated Weight: 100 kg/m²
System Typical Depth: 104 mm
Growing Substrate Depth: 60mm (settled)
Contouring: Flat/level

Key Features

  • A lightweight extensive green roof system suitable for a range of roof construction types.
  • System type allows for shallower substrate depths.
  • Attractive mix of sedum species.
  • Sedum plants are low growing.
  • Moderate range of biodiversity.
  • Moderate provision of nectar and pollen to attract insects.
  • Suitable for flat and pitched roofs.
  • Versatile system; quick and easy to install.
  • Low maintenance and drought tolerant.
  • Pre-grown mat provides an instant green coverage
  • Plant Species

    sedum-planting-01The sedum family of flowering plants are succulents and therefore have leaves which are able to store water. The majority grow naturally in arid, well drained areas, often on shallow substrate depths. Therefore they are drought tolerant, and able to survive in extremes of conditions. They generally flower from early summer to autumn.

    Flowering Period: May – August.

    Typical Colours: Seasonal variation of yellows, whites, and pinks. Foliage turns from green to red in periods of plant stress.

    No of Species Sown: 8 – 12.

    Typical Species: (subject to season variation) 
    Sedum acre, Sedum album, Sedum ellacombianum, Sedum floriferum, Sedum forsterianum, Sedum hybridum, Sedum kamtschaticum, Sedum montanum, Sedum oreganum, Sedum reflexum, Sedum rupestre, Sedum selskianum, Sedum sexangulare, Sedum spirium.

    Flower Attraction
    Low-moderate mixed pollen source, applicable to Bees – Mason, Honey Bombus spp; Insects – Chrysoperla (Lacewing), hoverfly (Episyrphus), Ladybird (Harmonia), Aphidius, Aphilinus, Aphidoletes (beneficial parasitic wasps).

    Establishment Period: 6 – 8 months.

  • Design Notes & Considerations

    General Notes

    The BMI Canopia ST Sedum Mat extensive green roof system is suitable for both new build and refurbishment projects. Roof pitches up to 45° may be used, but for slopes over 9° a retention system is required. All slopes over 5° will require a mechanically fixed eaves edge restraint.


    A border with a recommended width of 300 – 500 mm of washed river stones (20 – 40 mm diameter) should be used around all roof penetrations, outlets, perimeters and system edges to provide a vegetation free zone.


    Initial: Irrigation required immediately after installation for up to 8 – 12 months until fully established. Recommended irrigation period: 12 months. Pitched roofs retain less water and therefore a permanent irrigation to the green roof system should be considered.

    Once established: Irrigation is only generally required during prolonged periods of hot dry weather.

    Water Source: A roof top source with a pressure of 2.5 – 3 bar and a flow rate of 60 L/min is recommended to connect a temporary system if required.


    Sedum systems are designed to be low maintenance. Species selection ensures that the roof will evolve naturally, however weeds should be removed periodically through the year to reduce the likelihood that they become dominant. It is recommended that a suitable fertiliser is applied to keep the plants healthy. This may be a spring feed of slow/controlled release fertiliser to last the growing season, or more regular granular/liquid feeds throughout the growing season.

  • System Downloads - Datasheets & Product Information Sheets

    On this page you can download our information and documentation in one place. Click on any of the acrobat icons below and the brochure will start to download.



    download pdf BMI Canopia Green Roof Systems


    System Design Sheets

    download pdf BMI3012 Canopia ST Sedum Mat System


    Product Information Sheets

    download pdf BMI2977 Canopia Sedum Mat
    download pdf

    BMI Canopia FKD 20 Drainage and Storage Board

    download pdf BMI Canopia Washed Pebbles
  • Technical Support & Bespoke Green Roof Systems

    In the sections of our website above you can find details on many of our standard green roof systems that we offer as a simple solution to the needs of our clients most common requests.

    There are also many other alternative BMI Canopia green roof systems that we can offer as a bespoke package to meet your projects specific needs.

    How We Can Help You

    Find Local SupportBMI Canopia has a dedicated field service, with a network of technical advisers throughout the UK & Ireland, available to provide a bespoke insured green roof specification to meet your exact project requirements. Our advisory service for specifiers and contractors is free of charge. Our technical advisers are available at any time during working hours to answer queries on any aspect of green roofing design. 

    Services Include:

    Site Inspection - Experienced BMI Area Technical Managers can provide a comprehensive site inspection and condition report prior to making any recommendations for product use or installation. Site inspections can include a detailed commentary and photographic record, core sampling, fixing pull-out tests and thermographic imaging analysis where appropriate

    Design Assistance - BMI provides a range of design services to support project delivery, including all required calculations:

    • Specification - Bespoke system specifications can be generated for each project, based upon specific design criteria. Specifications can be provided in a variety of formats to suit customer requirements.
    • Drawings - Project specific detail drawings can be prepared showing critical interface detailing and airtight system terminations.

    Approved Contractors - Installation of the BMI Canopia Green Roof System is carried out exclusively by a network of trained and approved contractors who can demonstrate excellence in all aspects of roofing and landscaping. Using an BMI Approved Contractor ensures quality right from the start giving you access to a wealth of experience and technical skill protecting your investment with unrivalled guarantees.

    Installation of the BMI Canopia Green Roof System is carried out exclusively by a network of trained and approved contractors who can demonstrate excellence in all aspects of roofing and landscaping. Using an BMI Approved Contractor ensures quality right from the start giving you access to a wealth of experience and technical skill protecting your investment with unrivalled guarantees.

    Click here to find your local BMI Technical Adviser


    Alternatively our head office technical support team can be contacted on:

    0843 224 7400

    or click here to send a bespoke green roof form to our technical support team and we will contact you shortly.

Contact Icopal 0161 8654444

Find Local Support

To discuss your project in more detail please contact
Your Local Area Manager


Technical Support


0330 123 4585

Email: technical.uk@bmigroup.com


Sales Enquiries & Orders


0843 224 7400


0843 224 7401

Email: sales.admin@bmigroup.com

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