For both of these we need to follow specific green roof construction and maintenance procedures.
Extensive green roof construction details.
A general characterization of the two types of green roofing systems follows.
A semi extensive green roof sits somewhere in between the two main options and is based on the extensive roof principles.
Semi extensive green roof.
One important item to design for is an increased structural load.
Xf301 sedum blanket extensive green roof system when to specify.
978 0 471 67495 5 planting green roofs and living walls nigel dunnett noël kingsbury 2004 timber press isbn.
With more depth of growing substrate 100 200 mm it can support a greater diversity of plants but not shrubs and trees.
This is the lightest weight all in one system available.
Green roof systems susan weiler katrin scholz barth 2009 john wiley and sons isbn.
Intensive vs extensive green roof.
It comprises mature sedum on 20mm of extensive substrate and incorporating a multifunctional water retention and filter layer.
This is especially true of intensive green roofs which can have soil that is two feet deep or more.
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.
There are a number of things to consider when designing for a green roof.
The system is suitable for both new build construction and retrofit refurbishment projects.