Basic cross sectional drawing of a green roof.
Green roof layers thickness.
Grs root barriers come in 20 mil 30 mil and 40 mil thickness depending on the application.
It is ideal for systems that have typical green roof plants such as sedums which have shallow roots and will not present a lot of penetration pressure.
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.
If you want an intensive or extensive green roof a landscape garden a green wall located in an office building just noise insulation or to complete the ecological function of the green roof by installing solar.
Moisture retained by media that cannot be removed aka wilt point 12 18 typ.
Depending on the green roof layers thickness that you go with you will need to determine which are the most important to have included.
Green roofs can help reduce energy costs for a building by acting as another layer of insulation between the inside and outside of the roof.
Types of green roofs.
Green roof components growing media water holding capacity field capacity maximum water capacity astm test.
Rb20 is the most common root barrier product used for extensive green roof systems.
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.
Layers 4 to 8 form the green roof system.
A water supply with a capacity appropriate for the size of the planted area must be provided on the roof in order to protect the plants in the case of a prolonged dry period.
Green roof gardens have very ancient origins the hanging gardens of babylonia built by king nabucodonosor being one of the best known examples.
By alan burchell rubyana lyon green roof mar 3 2017.
It can add to water retention on the roof although the amount varies from 3 l m 2 to 12 l m 2 and is only really useful on slopes below 15 degrees.
The various planting systems.
The use of the roofs of buildings as green roofs is one of the main strate gies used in bio architecture to limit the environmental impact of the construction.
This can add an extra level of comfort and make your property in general feel a lot better to be in.
Moisture retained by saturated media after free draining 40 60 typ.
Each green roof is unique as their designs and performance vary by region climate and building type and use.
A range of different products are available reflecting the required functions and apart from the material itself vary according to thickness 3 mm to 20 mm fibre density and mass 320 g m 2.
