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…
The reported energy use reduction was as follows:
This suggests that a semi-intensive green roof has the maximum energy use reduction in humid tropical climates.
This suggests that an extensive green roof is more able in creating stable internal temperatures in sub-tropical climates during wintertime.
In studies conducted in the French temperate climate however, green roofs were shown to have very little impact on overall heating demands.
This was mainly due to reduced heat losses during cold winter days along with a reduction in positive solar gains during sunny winter days.
This suggests that green roofs have little impact in the thermal conductivity of buildings in temperate climate.
They measured the cooling effectiveness of extensive green roofs in a sub-tropical climate and a tropical island climate. They found that:
This suggests that the cooling effectiveness of the extensive green roof becomes more significant when the temperature is higher.