Street Ash Nursery, Combe St. Nicholas, Chard, Somerset, TA20 3HZ, UK
+44 (0) 3335 771 500
enquiries@blackdown.co.uk

Extensive Biodiverse Green Roof System

SPECIFICATION DRIVERS

Extensive biodiverse green roofs can replace or replicate habitats that have been lost or are in decline. New habitats can be created that improve biodiversity generally or specifically for a certain species.

MAINTENACE

Extensive biodiverse green roofs are low maintenance. Once established they will not require additional irrigation and will continue to develop to create a self-sustaining plant community.

Blackdown Greenroofs Extensive Sedum Build Up
PLANTING & SPECIES

A wider variety of succulents, grasses, herbaceous perennials, wildflowers, alpines and bulbs - these are typically offered as plug plants or pre-determined seed mixes.

 

BUILD UP HEIGHT & WEIGHT

Typically, the substrate is mounded to offer localised habitat variation, the depth of the substrate could vary between 70-250mm and weight approx. 70-300kg per sqm.

Further Detailed Information

In order to help make your selection of our green roof system as simple as possible you will find all the relevant documentation needed for your specification and designs below.

Blackdown Greenroofs download button

Key Features

Green roofs can replace or replicate habitats that have been lost or are in decline.

New habitats can be created that improve biodiversity generally or specifically for a certain species. For example; creating habitats for ground nesting birds or providing a habitat for seed bearing plants for sparrows. The source of these drivers can be Local Biodiversity Action Plans (LBAPs) or national targets.

In addition, biodiverse roofs can offer sustainable drainage, countering the heat island affect, enhance the visual amenity & well-being of occupants and offer indirect financial benefit i.e. extending the life of the waterproofing. These roofs are not designed to be trafficked and can be installed on flat to shallow pitched roofs.

Blackdown Greenroofs Rockliffe Hall
Blackdown Greenroofs extensive sedum plants

Design, Planting and Waterproofing

Typically, the substrate is mounded to offer localised habitat variation, the depth of the substrate could vary between 70-250mm and weight approx. 70-300kg per sqm.

A wider variety of succulents, grasses, herbaceous perennials, wildflowers, alpines and bulbs - these are typically offered as plug plants or pre-determined seed mixes.

Waterproofing options include Alumasc's Derbigum and Euroroof Mastergold membranes, Hydrotech structural waterproofing and standing seam.

Blackdown Greenroofs Maintenance

Installation and Maintenance

Blackdown green roofs can be installed by the Blackdown in-house Contracts Division or by Alumasc's nationwide network of Registered Contractors

Certain procedures are recommended, to ensure the long-term success of the plants.

Typical procedures carried during maintenance include:

  1. Removal of unwanted plant material i.e. invasive species (if required)
  2. Correction of any localised plant system problems that may have occurred post installation
  3. Replacement of any failed plants
  4. Application of nutrient source
  5. Removal of dead flower heads (if required)
  6. Inspection of rainwater outlet chambers and surrounding vegetation breaks
  7. Replenishment of any areas of settled substrate

As a general guide, it is recommended that maintenance be carried out two or three times in the first year and once or twice in each subsequent year but this depends on the type of system installed and the rate of plant cover.

Temporary irrigation is required for a period of 6-8 weeks until the plant material is established, once it has reached this point no additional irrigation should be required.