78
edits
Changes
Jump to navigation
Jump to search
Line 1:
Line 1: − + − + + + + +
no edit summary
There are two main types of green roofs, intensive and extensive.
There are two main types of green roofs, intensive and extensive.
Intensive green roofs have a deep planting bed and can support deeply rooting vegetation as well as pedestrian traffic. This section will solely discuss planting considerations for extensive green roofs.
'''Intensive''' green roofs have a deep planting bed and can support deeply rooting vegetation as well as pedestrian traffic. This section will solely discuss planting considerations for extensive green roofs.
Extensive green roofs have a porous, light-weight planting medium of shallow depth (40 mm to 200 mm) suitable for a limited number of grass and herbaceous species. Growing medium for extensive roofs varies widely and includes proprietary blends, sand, gravel, crushed brick, compost or organic matter. Extensive green roofs are intended to capture precipitation and roof runoff, require little maintenance, and are designed to succeed with minimal irrigation.
'''Extensive''' green roofs have a porous, light-weight planting medium of shallow depth (40 mm to 200 mm) suitable for a limited number of grass and herbaceous species. Growing medium for extensive roofs varies widely and includes proprietary blends, sand, gravel, crushed brick, compost or organic matter. Extensive green roofs are intended to capture precipitation and roof runoff, require little maintenance, and are designed to succeed with minimal irrigation.
Before construction, a structural engineer must confirm that the load bearing capacity of the building structure and roof deck are sufficient to support the weight of the soil, vegetation and accumulated water or snow, and, if applicable, pedestrians, concrete pavers, etc.
�
The waterproof membrane must be fully tested before any other layers are applied.
It should be noted that successful green roof applications not only input from a structural engineer is required, but also from landscape architects and landscape contractors experienced with this type of project.
It should be noted that successful green roof applications not only input from a structural engineer is required, but also from landscape architects and landscape contractors experienced with this type of project.