Green Roof Soil Depth Lawn

It is also important to factor in the type and lifetime of the roof membranethat will be used.

Green roof soil depth lawn.

Replacing the impervious surface of a conventional roof with. These require irrigation and a substrate depth of at least 200 mm. Whether your planting bed is in the lawn green roof or a planter proper drainage is crucial. Planting areas with restricted soil depth or restricted soil volume are notoriously prone to drying out quickly but don t be fooled into thinking you don t need to address drainage.

This rooflite soil system supports lawn grasses that require deeper root space and thrive on a soil with plenty of finer particles and the precise amount of organic matter. Green roofs with turf are lush usable spaces. Typical engineered soils layered 6 inches deep are 70 percent inorganic materials such as perlite lava rock and vermiculite and 30 percent organic material such as compost. A variety of plants that grow well in a soil depth of five to seven inches are good to use including certain perennials ornamental grasses herbs shrubs and sedums.

This green roof can be described as a combination of an extensive and intensive roof and therefore is also called a hybrid roof. Vegetables are the other main group of annual plants used on green roofs. The structural engineer must factor in the weight of completely saturated soil since the plantings and the soil will hold a significant amount of water. It is generally not recommended for hot climates.

This is especially true of intensive green roofs which can have soil that is two feet deep or more. Or more depending on the depth of the soil. Lawns have unique needs due to the foot traffic they experience. Some green roofs are constructed specifically to support sports turf.

Garden roof assembly hydrotech s garden roof assemblies combine the proven performance of our monolithic membrane 6125 roofing waterproofing with proven green technology. The lite system is typically used on retrofit projects when the roof is engineered with only 15 to 17 pounds per sf for the green roof component. The existing roof must be reinforced to carry the additional weight load anywhere from 15 30 lbs sq. Its soil depth is a full 2 inches enough to support many low growing succulents and a limited number of accent plants.

The garden roof lawn assembly is considered a lightweight assembly but with a slightly deeper soil depth and is designed to support sod lawns as well as perennials. Rooftop lawns are semi intensive green roofs with a total depth of at least 8 inches. Designers have the ability to create large lawn areas on rooftops using a garden roof lawn assembly.