Blackdown Extensive Green Roof

System Options

Extensive Vegetation Layer
Drought tolerant plant species, e.g. sedum
Blackdown Extensive Substrates
Lightweight growing media optimised for growth of succulents
Blackdown Filter Layer
Blackdown Extensive 25mm Drainage Layer
Blackdown Moisture/Protection Layer
Blackdown RG Root Barrier
(if not incorporated within the waterproofing)

Green Roof

Environmentally Focussed

Overview

Blackdown extensive green roofs are lightweight with a relatively shallow substrate, providing a versatile range of planting generally comprising of drought tolerant succulents such as sedum, rockery and alpine plants.

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Key Features & Applications

Blackdown extensive green roofs are suitable for lightweight roof decks, inaccessible roofs, flat or sloping roofs and are equally suited to re-roofing or new build projects
They are versatile, economic and can provide ecological and economic benefits. Their incorporation on the roof can result in reduced water run-off
Blackdown green roofs comply with the UK’s GRO Green Roof Code of Best Practice 2011 and the German Landscaping and Landscape Development Research Facility (FLL) Guidelines

Design, Planting & Waterproofing

Extensive green roofs have a typical build-up height of 100mm (including drainage layers) and do not normally require irrigation once they are established
Planting options include Naturemat, plug plants or sedum cuttings and typically consists of sedums inlcuding alpine and rockery plants. Sedum-type plants are self-sustaining and wind, frost and drought resistant
Variation within the system can be achieved by using different substrate formulations and depths to support rockery and alpine plants
Waterproofing options include Derbigum membranes, Euroroof Mastergold membranes, Hydrotech structural waterproofing and standing seam roofing

Installation & Maintenance

Blackdown green roofs can be installed by Alumasc's nationwide network of Registered Contractors
Blackdown extensive green roofs are easy to install, do not require a permanent irrigation system and need minimal maintenance
Warranties are available for the Alumasc waterproofing system used in the green roof build up