Green Roof Minimum Depth

Some green roofs are constructed specifically to support sports turf.

Green roof minimum depth.

Careful plant selection and maintenance is needed to ensure annuals do not become weeds on a green roof. They may include a granular drainage medium multi course or a synthetic drainage layer multi layer. Funding for green roofs is determined by green roof area gra and soil depth. Flat roofing solutions bauder flat roofs.

The initial expense of green rooftops often turns away prospective clients. Vegetables are the other main group of annual plants used on green roofs. Shallow ranging in depth from 2 cm 0 79 in to 12 7 cm 5 0 in. Therefor a significant amount of attention must be paid to the various.

There are two types of green roof. Types of green roofs. They can support many different kinds of plants but they are heavier and require more maintenance. These generally require a 5 15cm 2 6in depth of growing medium that can consist mainly of lightweight inorganic materials such as perlite leca sand rockwool and crushed tiles or concrete.

Thicker with a minimum depth of 12 8 cm 5 0 in. Green roof projects will undergo an advanced schematic 75 and 100 design review process with a two week review time for each phase. They are lighter than intensive green roofs and they don t. Plants for green roofs with a soil depth of 100mm.

Because green roofs require professional design careful structural analysis and multiple layers and systems even extensive green roofs usually start at 8 per square foot significantly more expensive than the 1 25 per square foot for built up roofs burs source. There are two types of green roof. These require irrigation and a substrate depth of at least 200 mm. Intensive roofs which are thicker with a minimum depth of 12 8 cm 5 1 16 in and can support a wider variety of plants but are heavier and require more maintenance and extensive roofs which are shallow ranging in depth from 2 cm 13 16 in to 12 7 cm 5 in lighter than intensive green roofs.

The minimum project amount must be 50 000. The most popular type of green roof sedum roofs are extensive green roofs that have a total depth of 3 to 8 inches. Tray systems are not a viable option for intensive roofs due to the weight. Intensive green roofs weigh from 35 pounds to beyond 100 pounds per square foot when dry it is all a matter of the soil depth which is affected by the amount of mounding that is used.

The schedule below outlines the maximum reimbursement rate for green roof projects.