13.07.2015 Views

Green Roofs - GreenSpec

Green Roofs - GreenSpec

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2.4 BenefitsThe various benefits of green roofs have been discussed by Brownlie (1990), Johnston(1995), Johnston & Newton (1993), Osmundson (1999) and Wells (2001). They may besummarised as follows:En vironment attenuation of stormwater run-off run-off attenuation reduces sewer overflows option of cleaning and recycling grey water absorption of air pollutants and dust reduction in the 'urban heat island' effect increased humidity absorption of noise absorption of electromagnetic radiation helping to absorb greenhouse gases (particularly CO 2 ) and giving off oxygen use of recycled materialsEcology & Biodiversity provision of new wildlife habitat replacement of habitat lost through development provision of quiet refuges providing links or stepping stones in greenspace networks often only available green space in inner urban coreAmenity more options for designers hides grey and uniform roofing materials screens equipment attractive views of vegetation extension of park system provides gardens - more people spaceHealth psychological benefits of contact with nature improved air quality – helps to reduce lung disease improved water qualityBuilding Fabric Protecting the roof from ultra violet radiation Protecting the roof from mechanical damage reducing diurnal/seasonal temperature changes in roof may improve thermal insulation14

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