R Value Of Intensive Green Roof

An intensive green roof is more high profile and resembles a roof garden because it has a much wider variety of plants.

R value of intensive green roof.

15 to 50 per square foot. Perhaps the most important benefit of green roofs is that they can reduce the amount of and improve the quality of stormwater runoff from a building site. Once you have more than r 20 in a roof assembly that is you meet the code things pretty much don t matter. The soils of a green roof will capture a significant amount of stormwater which is absorbed and used by the planted material.

All vegetation is planted directly into the soil mixture that makes up the rooftop. In other words go above r 20 and make green roof decisions for other reasons than energy. Green roofs save energy compared to uninsulated roofs or poorly insulated roofs or even better black poorly insulated roofs. 8 to 20 per square foot.

The economic benefits of any individual green roof will however depend on its design geographic location surroundings and the building itself. An intensive green roof weight varies from 35 to beyond 100 pounds per square foot when dry. 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. For a conventional roof.

With that in mind the real variable in the weight is the depth of planting material.