טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentAharoni Tamar
SubjectThe Benefits of Green Roofs and the Ways to Achieve
them in Israel
DepartmentDepartment of Architecture and Town Planning
Supervisors Professor Tal Alon-Mozes
Professor Elissa Rosenberg
Full Thesis text - in Hebrew Full thesis text - Hebrew Version


Abstract

A green roof is a roof on which the vegetation is planted on detached substrates while using special drainage and sealing systems. A green roof is a part of a green construction assembly, thanks to its environmental advantages for the building and the environment.

The benefits for the individual building are manifested in increasing the thermal and acoustic insulation of the roof, extending the life expectancy of the roof, improving the building façade and cooling the air temperature in spaces underneath the roof during summer.

At the urban scale, green roofs help detain storm water flow and reduce the volume of storm water reaching the subsurface drainage system; improve air quality, expand  biodiversity and reduce the urban heat island and heat load in the summer.

The advantages of the green roof were studied and demonstrated in research studies from around the world, cold and humid climates. Only a small number of studies on the benefits of the green roof were conducted in recent years in hot and dry climate conditions, mainly in Australia.

These climate zones are characterized by the absence of  precipitation during the summer months. Therefore, the maintenance of a green roof requires irrigation during the summer. This issue is problematic considering the water shortage in these areas and the high costs of irrigation.

The lack of water raises the question of whether  the installation of green roofs in hot and dry climates in general, and in Israel in particular, is worthwhile from an environmental standpoint.

The research question of this study is: which of the environmental benefits of the green roof can exist in a hot and dry climate and how these benefits can be achieved in Israel?

The study aims to:

1. Examine the environmental benefits of the green roof in hot and dry climate conditions.

2. Provide recommendations for green roofs installation that maximize environmental benefits in Israel.

The research stages:

1. Literature  review

a. The benefits of green roofs in hot and dry climate, focusing on the environmental benefits: reducing the urban heat island, cooling air temperature in summer, expanding the biodiversity, improving air quality and decreasing storm water loads.

b. Policy incentives for the construction of green roofs in Israel and the world.

2. Case study analysis of green roofs in hot and dry climate: in Australia, Arizona and Israel.