It comprises mature sedum on 20mm of extensive substrate and incorporating a multifunctional water retention and filter layer.
Extensive green roof construction details.
Extensive green roofing systems consist of lightweight naturalistic planting that provides extensive plant cover with minimal maintenance and a wide range of benefits including.
They are differentiated on the basis of plant selection growing medium type and overall cost.
978 0881926408 the green roof manual edmund snodgrass linda mcintyre 2010 timber press isbn.
The system is suitable for both new build construction and retrofit refurbishment projects.
Generally there are two types of green roof systems.
With more depth of growing substrate 100 200 mm it can support a greater diversity of plants but not shrubs and trees.
978 0 471 67495 5 planting green roofs and living walls nigel dunnett noël kingsbury 2004 timber press isbn.
This is especially true of intensive green roofs which can have soil that is two feet deep or more.
Little modification of the roof environment ensuring suitability for new or refurbishment applications.
For both of these we need to follow specific green roof construction and maintenance procedures.
There are a number of things to consider when designing for a green roof.
Intensive vs extensive green roof.
A semi extensive green roof sits somewhere in between the two main options and is based on the extensive roof principles.
Green roof systems susan weiler katrin scholz barth 2009 john wiley and sons isbn.
Semi extensive green roof.
A general characterization of the two types of green roofing systems follows.