Low Pitch Green Roof

Drainage thickness of growing media plant varieties etc.

Low pitch green roof.

Even a flat roof should have some pitch so that it sheds water toward gutters. Before the plants go up a structural engineer should check to ensure that the roof can support the weight of the engineered growing medium and plants. For a green roof installation that pitch should be at least inch per foot of run. Converting your roof to green offers many benefits to a homeowner from energy savings to expanding natural habitat.

Sloped roofs retain less water in general and the moisture content varies from the ridge to the eave lowest edge of the roof. Moreover low slope metal roofs are not prone to the degradation experienced by organic materials enabling these roofs to better resist the elements. Green roofs lower surface temperatures often by 50 degrees fahrenheit or more. If not properly secured a pitched vegetated roof can erode and slip under heavy rain excessive irrigation or poor plant growth.

In retrofit projects a sub framing system is attached to the existing flat roof surface to provide a minimum 12 roof pitch. The most crucial component of any sloped green roof is the confinement system which holds the growth medium in place during the roof s early stages of development.