Green roofs, brown roofs, living roofs, roof gardens and biodiverse roofs are all essentially the same and involve growing plants on a roof.
The differences come in the type of plants used, density of planting and substrates they grow in. They range from very diverse wildlife habitats, using grass and native wildflowers, to ‘monocrop’ sedum used only to satisfy planning requirements, and can even have a negative environmental impact if peat is used.
A well-designed constructed green roof should have a positive green impact. A badly designed roof using peat and wildflowers can create more CO2 and environmental damage than they generate and be a significant fire risk.
The Wallbarn M-Tray® has been developed to provide a diverse range of sedum species that provide a flourishing wildlife habitat. The peat-free tray can survive hostile conditions found on the roof, without the need for excessive management or maintenance. We are constantly trialling new species to include in our mixes but are constrained by fire regulations which restrict the use of many annual wildflowers.
A well constructed green roof maintained in peak condition will:
A poorly maintained or badly installed green roof will have the opposite effect and negate all of the benefits of a well maintained green roof. The key is to ensure that your roof has a realistic chance of thriving, that your investment is not wasted and you are not doing more harm than good to the environment.
Many also use peat as part of their compost and peat used in compost is environmentally damaging, unsustainable and expected to be banned in the foreseeable future. Peat extraction releases CO2 and destroys habitats, contributing to global warming; green roofs should have a positive contribution not a negative one.
The Wallbarn M-Tray® is a deep square tray designed to retain water and provide enough growing compost to sustain sedum throughout the years.
The M-Trays® we produce for Wallbarn give the best chance of a thriving green roof by including all the ingredients needed within the recycled modular tray. As long as regular maintenance and watering is provided then you will have every confidence that your investment in a green roof will deliver the wildlife and environmental benefits.
Specific benefits of the Wallbarn M-Tray® include:
We do not grow and provide roll-out sedum because it:
We are peat-free and our trays are made of recycled plastic.