Green Roof Considerations

When constructing a flat green roof the design aspect is much simpler.

Green roof considerations.

These issues are addressed below as general considerations where green roofs are either planned or already installed. The most important thing to keep in mind is that a green roof should not negatively impact the building s historic character. However these costs may also vary according to the issues outlined above under cost considerations. You just need to build up the core layers as per manufacturer s instructions when constructing a green flat roof.

They fall into three main categories extensive intensive and semi intensive. Design considerations for a successful green roof for a green roof to flourish it requires suitable amounts of sunlight water sufficient drainage and aeration to encourage healthy plant growth. Green roofs for healthy cities grhc is the north american industry association for the green roof and wall sectors. Green roofs are suitable for any pitch of roof.

Flat green roof design considerations. All roofs require a minimum of two inspections a year to ensure that the outlets etc are maintained regardless of the type of roof. The following rates for green roof components can be used as a guide. Example costs of individual components of green roofs.

Grhc develops and protects the market by increasing the awareness of the economic social and environmental benefits of green roofs green walls and other forms of living architecture through education advocacy professional development and celebrations of excellence. An intensive green roof will require the regular maintenance associated with the planting scheme and landscape design whereas an extensive green roof will need only minimal maintenance maybe one or two visits a. Considering the underlying purpose will shape the next decisions in designing the green roof and help determine if a green roof is an appropriate solution at all. Structural support of the green roof.

Although there are no precise definitions of them an extensive green roof has a shallow growing medium usually less than six inches with a modest roof load limited plant diversity minimal. Weight vegetative roof weights can range from 16 to 60 pounds per square foot depending on the depth of the growth medium types of plantings and accumulated weight of other additions such as pavers or water features. To deliver a successful green roof the designer must consider the building s position and location along with the orientation of the roof during the. Once the vegetation finish has been determined the structural and design considerations and green roof components can be proposed.

The next step planning the green roof to meet the needs of the vegetation. Drainage and protection layers 20 30 m 2.