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Wetland Park Green Roof Visit


types and configuration of green roof

The types and configuration of green roof:

Wetland Park_Green Roof System_Reserch

From Green Studio Handbook, Green Roofs

Types of Green Roof


1.          Intensive


Deeper soil base
No limited plant diversity
Provide park-like accessible open spaces, often including trees, walkways and irrigation system
Require substantial building structure
More expensive
Only feasible on flat roof
Require more cost and design time
Various habitats can be created

Often accessible to human for recreation
More energy-efficient
More protected and durable roof membranes
greater storm water retention capacity
Suitable to 600mm plants
Harder to maintain

2.          Extensive


Shallower soil base
less expensive
easier to maintain
limited plant diversity

Often inaccessible, mainly for visual beauty
Can work at slope up to 35 degrees*
Can be use both in urban and rural
Adoptable to various building types
Adoptable to new and existing construction
Suitable to 50-150mm lightweight plants

*(Slopes above 20 degrees require a baffle system to avoid soil slump)

Use of Green Roof
Provide for rainwater detention or retention
Increase thermal resistance of roof
Reduce urban heat island effect*
Offer animals and human an amenity space
A substitute as additional ballast against roof uplift unless in high or coastal regions

Hong Kong Wetland Park_Green Roof System _Draft Table of Contents

Through last lecture, I’ve amended the content:


Background Information of the Green Roof in Wetland Park
Definition of Green Roof­­­
Types of Green Roof
Reasons to adopt green roof in Wetland Park

Green Roof Component
Explain the configuration
Construction Process

Soft Landscape
Hard Landscape

Technical considerations
Structural loading
Wind & shading
Drainage system
Irrigation system

Existing problems on site
Worn-out of material

Comparison to other green roof applications in
Hong Kong

Appraisal to application of green rood in WetlandPark



Please feel free to leave your comments.
Thank a lot!

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