Lightweight Growing Medium Green Roof

Low weight can be crucial for huge building structures and retrofit projects with limited roof loads.

Lightweight growing medium green roof.

Green roof growing medium green roof growing medium what s so special about it. In general they do not require irrigation although some irrigation may be required initially. These materials are available throughout the west coast of north america. There are two variations for the system build up.

In general the bulk of the water storage in a green roof buildup is in the growing medium. 3 drainage including filterfleece 11 20 mm. For the best green roof medium the growing media should contain the following. Lightweight volcanic aggregate such as pumice or lava.

Extensive green roofs tend to have a thinner growing medium than intensive green roofs they therefore require less maintenance. Sedum roofs with a natural drainage layer are designed to maximize water retention while sedum roofs with a synthetic drainage layer may focus more on minimizing weight. Sedum roofs are extensive green roofs that have a media depth of 3 8 inches. These aggregates make a good basis for a growing medium.

In addition to that it helps maintain soil structure as well as air and water movement through the soil. Pumice is somewhat porous and is lighter than most aggregates. The aggregates organic matter and sand used in the growing medium help to give the soil structure its integrity allows for water retention and drainage and provides the balance needed for a healthy growing environment. Weight is an.

The extensive green roof lightweight cost effective and. It is a good growing medium and ensures good water absorption and tenacity.