SIG Design & Technology launches carbon negative VerdiRoof

SIG Design & Technology launches carbon negative VerdiRoof

SIG Design & Technology has launched a new Green Roofing system called Verdiroof by Verdico. The growing medium is carbon negative in production, and the whole system comes in a single delivery.

The growing medium for Verdico’s Verdiroof is UK sourced and comprises pumice, bark compost, and a unique carbon capture pellet, which is a by-product of the UK aggregate and waste industry.

Nigel Wraxall, Verdico Director, explains:

“The Verdico carbon capture pellets are produced using an innovative, patented process called Accelerated Carbonation Technology (ACT). ACT is a controlled accelerated version of the naturally occurring carbonation process, which results in an improvement in the chemical and physical properties of the treated materials. Very large volumes of CO2 are permanently trapped or captured in the resulting pellets. This prevents significant amounts CO2 being released through landfill.

“When carbonation is used in the recovery and recycling of waste in this way, an end product with real value is created. The resulting pellets are inert, lightweight, with irregular surfaces which offer water absorption and attenuation, and are therefore ideal for use in green roof substrates.

The University of Greenwich tested the Verdico growing medium and concluded that it is carbon negative due to the large volumes of CO2 captured in the pellet production. Each cubic metre of extensive substrate was calculated to have a CO2 footprint of minus 7kg.

The carbon negative quality of the Verdico growing medium makes it particularly attractive to specifiers who want to reduce the carbon footprint of their developments overall, with the UK origins of the product being an additional bonus. Over 1000 tonnes is already growing roofs in London.”

VerdiRoof Green Roofs are available in:
1. Extensive – both Sedum or Wild Flower
2. Biodiverse – as Brown Roof or plug planted Living Roof to enhance on-site ecology and support particular species, and
3. Intensive – to provide an amenity function, roof garden or terrace.

The system may also benefit from an innovative drainage board, Verdi-Drain25 that protects the waterproofing whilst ensuring that water is both retained to help sustain plant life and rapidly drained to avoid water logging.

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SIG Design Technology

SIG Design Technology

SIG Design & Technology is a part of SIG Roofing, a leading division of SIG plc, a FTSE 250 listed company and the UK's market leading specialist supplier to professionals in the building and construction industry. They design and supply flat roofing...
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