Extensive Green Roof R Value

15 to 50 per square foot.

Extensive green roof r value.

The relation between u values and the substrate moisture was linear. Green roof with rock wool substrate provided the higher energy savings. Trnsys software simulation was implemented to quantify the energy savings. 8 to 20 per square foot.

In other words go above r 20 and make green roof decisions for other reasons than energy. Green roofs reduce the temperature of the building and the surrounding air in multiple ways. We typically go. For a conventional roof.

Sailor et al jbp 2011. The study looked at a range of benefits of green roofs including stormwater management improved health benefits. A 2006 study by the university of michigan comparing costs of conventional and green roofs showed that on average installing a green roof costs about 22 00 sq. A green roof may improve property values and marketability especially in urban areas with little green space.

The university of michigan performed a valuation study comparing a 2 000 square meter conventional roof and a green roof. The cooling effect of each green roof component was demonstrated. Published literature showing extensive green roofs have r values between 1 8 and 4 8 while intensive green roofs have r values between 5 and 20. They provide shade to the top of a building evapotranspiration.

The plants in a green roof absorb water through their roots and then use surrounding heat from the air to evaporate the water while some roofs can reach temperatures of up to 90 f in the summertime these two features can allow. Highlights green roofs u value was experimentally determined on a paslink test cell. Green roofs save energy compared to uninsulated roofs or poorly insulated roofs or even better black poorly insulated roofs.