They may be flat or sloped.
Residential green roof for slope.
Drainage thickness of growing media plant varieties etc.
All green roofs are built upon a roof deck and may be made from concrete steel or wood.
Seed mixtures can be bought specifically for green roofs.
With an extensive green roof vegetation is thinner 1 6 to five inches thick and lighter with appropriate plants that will make them low maintenance and self sustaining.
Sloped roofs retain less water in general and the moisture content varies from the ridge to the eave lowest edge of the roof.
Basic green roof components include the base roof deck water proofing layer and green roof systems.
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.
The following is a summary of the basic green roof system components.
We have chosen to use the word vegetative rather than the word green in this guide because a non vegetative roof could be considered to be environmentally green without being vegetative.
The green roof will be composed of a liquid applied waterproofing membrane an inch thick root barrier three inches of insulation a 1 inch drainage mat with filter fabric and 8 inches of growth medium with an integrated cellular confinement system.
For semi intensive green roofs consider grasses shrubs small trees woody plants and herbs.
You must address several structural concerns before you can embark on creating a green roof.
The majority of north american residential roofs have historically been constructed with a slope between about 4 12 and 9 12.
Most critical for a low slope roof is weight bearing capacity.
2 extensive green roof.
Residential green roofs such as theirs protect natural waterways from oily street residue by lessening the chances that municipal storm drain systems will overflow.
Extensive roofs can weigh between 15 and.
It is the task of the designer to make adjustments in the green roof system accordingly e g.
Any large slope or flat roof that s hard to reach makes a great area for this kind of vegetation as nature will take care of itself.
The slab will be supported on nine steel columns with five girders and 45 beams situated to create the saddle like hypar roof shape.
Roofs at the lower end of the range about 4 12 to 6 12 are relatively easy to walk and work on.
It also keeps the room below it warmer in winter and as much as 6 to 8 degrees cooler in summer thereby reducing utility costs.
Vegetative roofs also known as green roofs are thin layers of living vegetation installed on top of conventional flat or sloping roofs.
For extensive green roofs it s good to use moss sedum herbs and grasses.
