How Thick Is A Green Roof

Do not install butyl rubber waterproofing membranes when ambient temperatures are below 40 f.

How thick is a green roof.

An extensive green roof or sedum roof is a roof with vegetation that is more or less self perpetuating and that can further develop and maintain itself. Our permaseal 20p membrane functions as both a drainage layer and as a reservoir see image above. The modern green roof movement began in germany in the mid 1970s. At permagard we stock an 8mm and 20mm cavity.

First you need to install a waterproof membrane that possesses monolithic properties. The green roof drainage layer thickness depends on your needs. It could be made of plastic or rubber and it fits on top of the traditional roof decking. Building a green roof.

It is recommended that minimum 90 mil 2 3 mm thick reinforced butyl rubber membranes be used for green roof assemblies. The term green roof is a catchall for any roof with vegetation on it and is also sometimes referred to as an ecoroof. There are two types of green roof. 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.

Green roofs are also known as vegetative or eco roofs. They fall into three main categories extensive intensive and semi intensive. How to construct a green roof. Its proponents were interested in creating green space in otherwise barren urban areas.

Here are some easy to follow guidelines for the construction or installation of a green roof. Although there are no precise definitions of them an extensive green roof has a shallow growing medium usually less than six inches with a modest roof load limited plant diversity minimal watering requirements and is often not accessible. Butyl rubber membranes only should be used in conjunction with adhesives and tapes recommended by the membrane manufacturer.