Tag Archives: green roof

Do Green Roofs Provide Insulation Value?

Green Building

Do Green Roofs Provide Insulation Value?

How much additional insulation does a green roof provide? I posed this question to two green roof experts that I am working with on an upcoming project. Their responses were consistent and somewhat surprising. The short answer: NONE. Green roofs provide innumerous benefits including shading by foliage, retarding heat transfer by advection (transfer of heat or matter by the flow of a fluid), providing thermal mass effect, prompting evapotranspiration, increasing stormwater retention, and protecting waterproof roofing assemblies. However, a green….

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Are Green Roofs a Fire Hazard?

Green Building

Are Green Roofs a Fire Hazard?

An interesting question posed to me recently by a contractor: do green roofs pose a legitimate fire hazard? Every summer we hear about brushfires in the southwest propagated by dried vegetation resulting from perpetual drought conditions. The origins of our country’s building codes lie in the great fires that destroyed various major cities during the 1800’s. Chicago – the poster child of urban green roofs in the U.S. – nearly burnt to the ground in 1871. Could it be that….

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