Page 55 - Hong Kong Green School Guide

3. Green School Guide - 3.1 Green School Sites
Hong Kong Green Building Council 53
14 The Government of Hong Kong Special Administrative Region. Architectural Services Department. (2009). Green Roof
& Vertical GreeningApplications in Government Projects Presentation. Hong Kong.
• Type C and type D require evaluation of structural
loading on wall, practicality of growing substrate
installation and water for irrigation and drainage system
at high level and means of escape in case of fire. In
addition, type D involves high level of cost commitment.
A careful evaluation should be carried out beforehand,
particularly for retrofits. Please consult Authorised
Person (AP), Registered Structural Engineer (RSE)
and vertical greening system contractor to assess the
feasibility;
• Engage Landscape Architect and/or Landscape
Contractor to assess planting densities and selection
of species, the method of irrigation. Please refer to
Water Efficient Irrigation section in this Guide for more
information;
- - Wind effect.
• Selection of right plants is crucial to the success of vertical greenery. In
general, drought-tolerant plants are better as the growing medium is usually
thin that dries up rapidly due to gravity;
• Irrigation is the lifeline of any vertical greenery system. Automatic irrigation
system for a consistent supply of irrigation water is advisable;
• School can choose four types of vertical greening system14 according to their
need and building design:
• Type A and type B are suitable for retrofitting existing schools, as they do
not require additional growing substrate on wall (hence structure loading
on wall). Please consult Landscape Architect, Landscape Contractor and/or
vertical greening system contractor for further information;