Journal
ENERGY AND BUILDINGS
Volume 42, Issue 10, Pages 1582-1591Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.enbuild.2010.05.004
Keywords
Green roof; Energy consumption; Structural capacity; Retrofit; Insulation
Funding
- Engineering and Physical Sciences Research Council (EPSRC)
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Green roofs are a passive cooling technique that stop incoming solar radiation from reaching the building structure below. Many studies have been conducted over the past 10 years to consider the potential building energy benefits of green roofs and shown that they can offer benefits in winter heating reduction as well as summer cooling. This paper reviews the current literature and highlights the situations in which the greatest building energy savings can be made. Older buildings with poor existing insulation are deemed to benefit most from a green roof as current building regulations require such high levels of insulation that green roofs are seen to hardly affect annual building energy consumption. As over half of the existing UK building stock was built before any roof insulation was required, it is older buildings that will benefit most from green roofs. The case for retrofitting existing buildings is therefore reviewed and it is found there is strong potential for green roof retrofit in the UK. (C) 2010 Elsevier B.V. All rights reserved.
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