The document discusses the use of double roof structures to reduce heat gain in buildings in tropical climates, specifically in Petaling Jaya, Malaysia. It provides an overview of double roof structures, including pitched and flat roofs, and how they provide climatic response. It also discusses case studies of double roof structures, including the Roof-Roof House designed by Ken Yeang. The document then examines the adaptation of a double roof structure used in the Safari Roof House in Petaling Jaya. It analyzes factors that affect the efficiency of double roof structures and compares the performance of single and double roof designs in reducing heat gain.

1. The use of Double Roof Structure to reduce Heat Gain in the
Climatic Responsive Design of the Safari Roof House, Petaling
Jaya.
Table of Contents Page
Abstract.............................................................................................................................0
1.0 Introduction.........................................................................................................0
1.1 Roof as Building Fabric ..................................................................................0
1.2 Roof in Tropical Rainforest Climate ...............................................................0
1.3 Malay Vernacular Architecture .......................................................................0
2.0 An Overview of Double Roof Structure..............................................................0
2.1 Pitched and Flat Roofs ..................................................................................0
2.2 Climatic Response..........................................................................................0
2.3 Case Studies...................................................................................................0
2.3.1 Roof Roof house by Ken Yang.............................................................0
3.0 The Adaptation in Safari Roof House................................................................0
4.0 Factors Affecting the efficiency of Double Roof Structure ................................0
5.0 Comparision between Single Roof and Double Roof structure .......................0
6.0 Conclusion...............................................................................................................0
7.0 References..............................................................................................................0

2. Abstract
The purpose of this paper is to make a throughout study on the suitability
and sustainability of the use of double roof in tropical climate as compared
to single roof structure and local vernacular architecture. With the roof being
the most prominent feature in Malay traditional houses, it is anticipated to
discover the adaptability of the new roof structure in reducing heat gain and
representing the local identity. In assisting the validation of research,
literature reviews and references based on the various sources on the roof
structure and building science are carried out to enhance the findings. In
order to provide a more practical insight, case studies on Roof-Roof House
by Kenneth Yeang and double roof pavilion or also known as Gazebo are
conducted and further taken to be referred. It is found that double roof
structure can be divided into two categories which are pitched roof double
and flat roof double. In Safari Roof House, Kevin Mark Low has implied the
flat roof double strategies inspired by the tropical Landrover and it has able
to reduce heat gain by directing wind flow, deferring direct heat gain on the
building through natural convection (Magnify Credit Union - South Lakeland
Branch, 2015) , and reflecting unnecessary solar radiation. To increase the
capability of the roof to reduce heat gain, various aspects such as low
thermal capacity materials, surface reflectivity, orientation of the roof and
roof structure are studied and discussed in the topic. Hence, it has come to a
conclusion that the double roof structure demonstrate a good quantity of

3. advantages in the context of hot and humid climate. Comparison between
single and double roof structure is planned and discussed to further to serve
as a guidance for future builders.