Browsing Faculty of Architecture and Interior Design by Subject "Building envelopes"
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ItemThe importance of integrating LCA into the LEED rating system(Elsevier Ltd, 2016) Dekkiche, Hamoud ; Taileb, AliLEED (Leadership in Energy and Environmental Design) is a rating system that rates green buildings; LCA (Life Cycle Assessment) is a tool to evaluate the environmental impacts of building materials. The aim of this paper is to demonstrate the importance of integrating LCA into LEED to enhance its rating system. The LEED Gold building presented in this research is the Centennial College Progress Campus located in Toronto, Canada. Using ATHENA® Impact Estimator version 4.5 to conduct the LCA, this study analyses how different building envelope solutions and building materials affect the results of the environmental assessment of a whole building over the building's life cycle of 60, 80 and 120 years. Environmental impact assessment of LEED buildings is discussed, further research topics are suggested; for example how to develop specific LCA software tools and integrate them into LCA analysis for green building rating system. © 2016 The Authors.
ItemInfrared imaging as a means of analyzing and improving energy eficiency of building envelopes : the case of a LEED Gold Building(Elsevier Ltd, 2015) Ali, Taileb ; Dekkiche, HamoudToday many designers claim that they are engineering green or LEED certified buildings. LEED is an evaluation system that rates how sensitive buildings are to the environment and the objective of LEED is to reduce emissions through development of highly efficient mechanical systems, designing of durable and efficient wall systems and by providing additional thickness to insulation. Unfortunately currently there are many cases where these wall systems and insulations are supported by thin steel studs, which are highly conductive of energy and are 400 times more conductive than wood. The aim of this paper is to investigate the use of thermal bridging in a LEED certified building. Thermal bridging is a major source of heat loss through studs and wall systems in many buildings worldwide. The investigated building is Gold certified building built in 2011 located in Toronto, Canada. The exterior walls consist of a copper and brick cladding and steel studs. Using thermal imaging, as a non-destructive testing method, this research investigates and identifies the location of thermal bridging. This study recommends how to integrate infrared imaging into the LEED certification process and how to improve the future design of efficient wall systems. © 2015 The Authors. Published by Elsevier Ltd.