Green Roof Growth Medium

The extensive green roof lightweight cost effective and probably the most popular of the green roofs.

Green roof growth medium.

Types of green roofs. Filter rainwater and buffer acid rain. Over a 100m2 green roof with 10cm depth of growing medium the weight saved by using substrate instead of soil is considerable. In general the bulk of the water storage in a green roof buildup is in the growing medium.

Green roofs on small 1 8 by 2 4 m buildings consisting of a conventional flat roof covering a root barrier a 12 mm thick enka drainage layer 89 mm of growth medium 25 mm of porous expanded. However the factors allowing for a lightweight roof can create a high stress environment for plant material. Careful consideration and planning is required during the design phase of a green roof build and a local growth expert should be consulted in order to develop the best system for your needs. These generally require a 5 15cm 2 6in depth of growing medium that can consist mainly of lightweight inorganic materials such as perlite leca sand rockwool and crushed tiles or concrete.

The best green roof media should be able to effectively maintain water retention at optimum levels for vegetation as well as facilitate stormwater management. In addition to that green roof media should be able to supply basic nutrients and maintain good porosity. Effectively grow liveroof plants. Be approximately 94 inorganic by dry weight 92 in british columbia as is the case with ecologically stable sustainable mature green roofs.

Green roofs are made up of several layers typically a waterproof root barrier layer to protect the roof a drainage layer water retention mat then the growing medium and vegetation. This of course can be reflected in the cost of building materials. When saturated these layers can weigh in at more than 100kg per square metre or 20lbs per square foot. Container gardens on roofs where plants are maintained in pots are not generally considered to be true green roofs although.

Conform to german fll granulometric standards. Last for many decades. Liveroof engineered green roof soil is designed to. Green roof substrate has been researched developed blended and improved over several decades.

Commonly referred to as growing media or soil substrates the growing medium used is an essential part of the green roof system.