Thickness Of Layers Of Green Roofs

The basic anatomy of a green roof consists of vegetation growing medium filter membrane drainage layer waterproof root repellant layer roofing membrane support for plantings above thermal insulation vapor control layer and structural roof support.

Thickness of layers of green roofs. Due to the excessive water amounts associated with green roofs. By alan burchell rubyana lyon green roof mar 3 2017. 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. Each green roof is unique as their designs and performance vary by region climate and building type and use.

This can add an extra level of comfort and make your property in general feel a lot better to be in. Extensive semi intensive and intensive green roofs. Drainage protection filtration layer it is used for lightweight green roofs terraces and has many functions. Depending on the green roof layers thickness that you go with you will need to determine which are the most important to have included.

In the city of chicago alone a weston design consultant study estimates the. One that we recommend considering is the green roof insulation layer. The nominal thickness of a green roof is the approximate total height of the soil and drainage components that constitute the green roof system excluding the roof structure insulation waterproofing and plants it is common practice to use the term extensive to describe green roofs that are very thin and will only support hardy drought resistant vegetation. Bauder sdf drainage layer material of the drainage layer polyamide monofilament weight of the drainage layer 400 g m.

Comparison of the various green roofs an extensive green roof is characterised by its low weight a thin layer of growing medium green substrate a mix of plants adapted to conditions on the roof minimum maintenance and low installation costs. This is most noticeable in intensive green roofs since there is a thicker and more consistent layer of soil which provides a higher insulating value. The clay and silt content of materials used in a rock aggregate drainage layer should be 10 per cent by mass. The whole thing though is more or.

A membrane is the bottommost layer of a green roof and is the main separation between the green roof above and the structural supports below. Protection drainage and filtration. All three types of roofs require specific layers of roofing materials not found on regular roofs. The protective layer can be a slab of lightweight concrete insulation thick plastic copper foil or any combination of these.

The rock aggregate should also have a suitable ph and be low in soluble salts to ensure plant growth is not adversely affected. Older green roofs often used a permeable layer of rock aggregate such as scoria or gravel for drainage. It is made of a filtration veil and the polyamide monofilament fibre network layer. Types of green roofs.