Extensive Green Roofs are the most common type and are relatively self-sufficient; they are not designed or constructed with the intention of being trafficked by pedestrians. Whilst not providing any kind of amenity area they do contribute to improving air quality, reducing the visual impact of the roof and assist in controlling rain water run-off/ harvesting as well as contributing to the acoustic and thermal properties of the roof.
Extensive Green Roof Systems are characteristically lightweight, with saturated loadings ranging from 80 – 120kg per m2. An ABG Extensive Green Roof System typically consists of a drainage & reservoir layer; Roofdrain, a lightweight Extensive growing media, aluminium edge profiles and a vegetation layer.
An Extensive Green Roof including drainage & reservoir layer, growing media and plug plants.
Typical Client Profile
- Landscape Architects
- Drainage Consultants
- Local Authority Planning Depts.
- Roofing Contractors
- Roofing System Suppliers
- Main Client
Associated System Products
Within an extensive green roof system, the following geosynthetic products and accessories may be used in the extensive green roof design:
Roofdrain is designed for use in extensive green roof systems. It provides both drainage and attenuation in a convenient, lightweight and cost effective system.
Extensive Growing Media
A blend of water retaining aggregates, crushed brick and organic material mixed to provide an extensive substrate to meet customer specifications. Extensive substrates are a versatile lightweight general purpose green roof growing media ideal for sedum matting systems and substrate based systems supporting hardier lower maintenance plants such as sedum.
Pre-Grown Sedum Mat
ABG’s green roof vegetation mats are supplied ready-to-roll-out as an instant vegetation layer. An attractive mix of more than 16 varieties of sedum with differing colours and leaf forms for low maintenance and extreme drought tolerance.
The ‘plugs’ are varieties of sedums, herbs and perennials, planted by hand to the required density. Available in a wide range of species to suit the individual requirements of the project.
Abpro Aluminium Profiles
ABG Abpro Aluminium Profiles are designed for use in a variety of green roof applications as an edge restraint or as segregation between different materials.
ABG Green Roof Access Chambers
Purpose designed to create an inspection point around a roof outlet.