Some studies have examined how different climates influence the performance of green roofs, as well as which type of green roof is best suited for specific climates…
This suggests that intensive roofs have higher capacity to retain water, but the difference with extensive ones is minimal.
In the summertime,
In the wintertime, the green roof reduced heat losses during cold days but increased them during the sunny days of the winter.
They conclude that the net thermal benefits of green roofs in wintertime depend on climate, plant choice, roof construction and location.
This suggests that while an extensive green roof reduces heat flow and energy demand during wintertime, this ability is condensed during snow cover.
During major freezing periods, there was a decrease in heat flux for the green roof.
The continuous decrease in temperatures however led to the accumulation of snow on the green roof and a reduction to its ability to moderate heat flux.
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