Moving Towards a Green Organization
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Green Initiative Item 1 – Green Roof

Green roof enhances thermal insulation, especially the top floor level, and alleviate the urban heat island effect. Besides, green roof provides amenity and aesthetic environment to both premises itself and the surroundings. It could also bring educational benefits such as learning the benefits of green roof and scientific research.

The Environment and Conservation Fund (ECF) relevant Vetting Subcommittee approved a total of 11 services units for TWGHs green roof pilot project, which including the Administration Headquarters, 6 schools, 2 community services centres and 2 properties. Details of the services units and the work progress are listed below:

Services Units Work Progress
TWGHs Administration Headquarters Completed
TWGHs Chang Ming Thien College Completed
TWGHs Chen Zao Men College Completed
TWGHs Mrs. Wu York Yu Memorial College Completed
TWGHs Mrs. Fung Wong Fung Ting College Completed
TWGHs Li Ka Shing College Completed
TWGHs S. C. Gaw Memorial College Completed
TWGHs Wong Cho Tong Social Service Building Withdrew due to site constraint
TWGHs Tai Tung Pui Social Service Building Completed
Tung Sun Commercial Centre Completed
Centenary Mansion Block 2 Withdrew due to site constraint

TWGHs Chang Ming Thien College

A green roof system was constructed on the accessible roof above three classrooms. Three different types of plants were grown with the same soil thickness, each type above an individual classroom underneath. The types of plants include Zoysia Japonica ( 朝鮮草 ), Arachis Duranensis ( 蔓花生) , and Alternathera Dentata ( 紅龍草 ) . A seminar on recent research work on green roof project was delivered by Prof. WAI Wing Hong, Onyx on 10 November 2009.

 

Proposed roof layout of TWGHs Chang Ming Thien College

Photo 1. The green roof system of TWGHs Chang Ming Thien College

Photo 2. The green roof system of TWGHs Chang Ming Thien College

Photo 3. The green roof system of TWGHs Chang Ming Thien College

Photo 4. The green roof system of TWGHs Chang Ming Thien College

TWGHs Chen Zao Men College

A green roof system was constructed on the accessible roof. There were a total of 4 zones growing different plant types for biodiversity. Students will study the plants and their living environment.

 

Proposed roof layout of TWGHs Chen Zao Men College

Photo 1. The green roof system of TWGHs Chen Zao Men College

Photo 2. The green roof system of TWGHs Chen Zao Men College


TWGHs Mrs. Wu York Yu Memorial College

A green roof system was constructed on the accessible roof above three classrooms. Three different soil thicknesses, 10mm, 25mm, 50mm were used to grow the same plant Zoysia Japonica (朝鮮草) at the centre of the green roof, for comparing their effects on the result. Duranta Repens Golden (金連翹), Aglaia Odorata Lour (米仔蘭), Sansevieria Trifasciata Prain (金邊虎尾蘭), and Perilla frutescens (紫蘇) were grown at the periphery.

 

Proposed roof layout of TWGHs Mrs. Wu York Yu Memorial College

Photo 1. The green roof system of TWGHs Mrs. Wu York Yu Memorial College

Photo 2. The green roof system of TWGHs Mrs. Wu York Yu Memorial College

Photo 3. The green roof system of TWGHs Mrs. Wu York Yu Memorial College

Photo 4. The green roof system of TWGHs Mrs. Wu York Yu Memorial College


TWGHs Administration Headquarters

Layout
Green Roof Acknowledgement Plaque

TWGHs Mrs. Fung Wong Fung Ting College

Layout
To be provided later
Green Roof Acknowledgement Plaque

TWGHs Li Ka Shing College

Layout
To be provided later
Green Roof Acknowledgement Plaque

TWGHs S. C. Gaw Memorial College

Layout
Green Roof Acknowledgement Plaque

TWGHs Tai Tung Pui Social Service Building

Layout
To be provided later
Green Roof Acknowledgement Plaque

Tung Sun Commercial Centre

Layout
Green Roof Acknowledgement Plaque

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