Extensive Green Roof Layers

Simpler shallower cheaper green roofs with limited variety of plants are called extensive green roofs these systems are easy to install require little to no maintenance or irrigation and weigh the.

Extensive green roof layers. Typically they have thin layers of substrate the growing medium to keep depth and weight to a minimum. The bronx county courthouse features a 1 inch drainage layer with a 2 5 3 inch deep growing medium profile the green roof is composed of a mix of sedums and hardy herbs with a sweeping crescent of small grasses. By alan burchell rubyana lyon green roof mar 3 2017. Three types of green roofs exist.

The vegetation for this roof needs a lot of water and regular maintenance. Extensive green roofs are designed to be low maintenance lightweight systems with no general access. They generally have lower water requirements and use small low growing plant species particularly succulents. Vegetative roofs also known as green roofs are thin layers of living vegetation installed on top of conventional flat or sloping roofs.

Extensive semi intensive and intensive green roofs. Green roofs have traditionally been categorised as extensive or intensive. The vegetation consists of lawns shrubs and trees and can easily be combined with pedestrian and vehicular pavements. Examples of extensive green roofs.

Types of green roofs. To make this process work various green roof layers are created to give it the most effective and solid chance of being. They fall into three main categories extensive intensive and semi intensive. However the difference between green roofs and an actual green roof is that a green roof comes with various layers.

A green roof is a layer of vegetation planted over a waterproofing system that is installed on top of a flat or slightly sloped roof. Each green roof is unique as their designs and performance vary by region climate and building type and use. In short a green roof is made to purposely grow grass. 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.

Extensive green roofs sedum roof systems. Intensive green roofs are comparable to soil bound green areas such as gardens and park landscapes. It also has plants and the like on top. Green roofs are also known as vegetative or eco roofs.

Extensive green roofs are generally made up of a very thin layer of soil or other planting medium with shallow root plants like sedum mosses and grasses.