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Extensive Brown Roof System

SPECIFICATION DRIVERS

Brown roofs offer the same advantages as biodiverse roofs but without any plant material being added at the point of installation. Plant material can either blow in from the local environment or be introduced by birds.

NBS Specifications Inverted / NBS Specifications Warm

MAINTENACE

Despite the initial lack of plant material associated with a brown roof, it’s still important to provide an appropriate level of maintenance as listed for other extensive roofs. No temporary irrigation is required.

Blackdown Greenroofs Brown Roof
PLANTING & SPECIES

None provided upon installation. Typically, any plant material is introduced from external sources.

 

 

BUILD UP HEIGHT & WEIGHT

Typically, the substrate is mounded to offer localised habitat variation, the depth of the green roof could be between 70-250mm and weight approx. 70-300kg per sqm, depending upon weight loading limits.

Blackdown Greenroofs brown roof at Elephant and Castle

Key Features

Brown roofs offer the same advantages as biodiverse roofs but without any plant material being added at the point of installation. Plant material can either blow in from the local environment or be introduced by birds.

Blackdown Greenroofs would not recommend the use of site derived soils and sub-soils to be used on the roof in lieu of a proprietary biodiverse substrate of known composition.

These roofs are not designed to be trafficked and can be installed on flat to shallow pitched roofs.

Blackdown Greenroofs brown roof at Elephant and Castle

Planting and Waterproofing

Typically, the substrate is mounded to offer localised habitat variation, the depth of the green roof could be between 70-250mm and weight approx. 70-300kg per sqm, depending upon weight loading limits.

No planting is provided upon installation. Typically, any plant material is introduced from external sources.

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

Installation and Maintenance

Blackdown Greenroofs' systems can be installed either by their installation teams or by Alumasc's nationwide network of Registered Contractors.

Despite the initial lack of plant material associated with a brown roof, it’s still important to provide an appropriate level of maintenance as listed for other extensive roofs.

No temporary irrigation is required.