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GREEN ROOF Above: Wallbarn’s M-Trays filled with substrate (left of image) and waiting to be filled. Inset: Sedum trays. Below: The composting process. >>> Continued from page 24 M-Trays to lighten the substrate mix and introduce fibres that lock in moisture and nutrients. In use, interaction between the green compost and the coir gives a slow release of nutrients over an extended period of time. Lytag: a lightweight ballast which is a waste product from power station waste. Leca: an expanded clay which is also a waste product and super lightweight/bulk forming. The roots of sedum and wildflowers grip the particles to bind into the substrate and support the whole green roof. The GRO Code advises 50% non-organic content within the substrate and Wallbarn achieves this by including Lytag/Leca pellets, which it sources in the UK. That both the coir and Lytag/Leca are waste materials from other industries is no coincidence; Wallbarn says it strives to make its M-Tray system as environmentally friendly as possible within the bounds of performance and regulatory compliance. The green red line David and Keith are also very clear that peat has no place in any compost Sedum Growers produces: “It is a red line for us and has been for the last 10 years. We were determined to phase out peat rather than wait for the legislation to change,” Keith said. The legislation he refers to is aimed at protecting peatland habitats and meeting net zero targets, with the government set to ban the use of peat in horticulture retail by 2024 and by 2028 for commercial growers. Rigid adherence to high quality and environmental responsibility is an ethos driven by Wallbarn, as Director Julian Thurbin explained: “Wallbarn goes above and beyond legislation and guidance relating to green roofs. We’ve been at the forefront of many industry changes and always strive to physically test ingredients to ensure they perform as we wish, using Warringtonfire for fire tests and STRI for growth tests. “M-Tray exceeds all regulations by a significant degree. Our ethos is to provide customers with industryleading, healthy green roofs that thrive throughout their lifetime, meet regulatory and industry standards and are as eco-friendly as possible.” Contact Wallbarn www.wallbarn.com Tweet: @wallbarn 26 GREENSCAPE WINTER <strong>2022</strong> • www.greenscapemag.co.uk
SIKA NOW OFFERS A COMPLETE GREEN ROOFING SYSTEM WITH ROOTS LIKE OURS, IT WAS THE NEXT NATURAL STEP Building on our reputation in roofing, Sika’s complete green roofing system provides many sustainable benefits. And on one project, it has even provided a grazing area for a flock of Dutch Spotted Sheep, who help reduce maintenance costs. Sika’s complete green roofs help to manage storm water, improve the building’s thermal performance and enhance biodiversity in nature. SikaRoof ® Wildflower Blanket UK SikaRoof ® Substrate Bio-diverse UK SikaRoof ® Rigid Drainage Layer 20 UK SikaRoof ® Protection Fleece P-225 UK WOULD YOU LIKE TO KNOW MORE? Email enquiries@uk.sika.com Visit www.sika.co.uk/greenroof
Page 1 and 2: GREENSCAPE Ensuring Best Practice f
Page 3 and 4: GREENSCAPE IN THIS ISSUE... Matt Do
Page 5 and 6: GREENSCAPE SOLAR PV 28 The year whe
Page 7 and 8: Proud to be a member of the GRO Cod
Page 9 and 10: GREENSCAPE Above: Alice, Georgia, E
Page 12 and 13: EXHIBITIONS & NETWORKING See GRO at
Page 14 and 15: ACADEMIC CORNER DROUGHT TOLERANCE F
Page 16 and 17: ACADEMIC CORNER >>> Continued from
Page 18 and 19: GREEN ROOFS PLANT SELECTION GROWING
Page 20 and 21: GREEN ROOFS MAINTENANCE GAINING THR
Page 22 and 23: MYTHBUSTERS MYTH: DEEPER SUBSTRATE
Page 24: GREEN ROOF SUBSTRATES WHAT LIES BEN
Page 29 and 30: Technical support Roofing experts o
Page 31 and 32: THE GRO GREEN ROOF CODE 1 Green Roo

Winter 2022

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