Green Roof Substrate Composition

Proportions of components vary among substrates based on target vegetation green roof type and other considerations.

Green roof substrate composition.

Measured substrate parameters were. Lastly skinner s article provides very helpful information on green roof substrate composition. They can include scoria ash pumice sand coir pine bark porous chemically inertfoams and even recycled materials such as crushed bricks and roof tiles. Therefore it has been found that green roof substrate can be optimised for specific climates or service provision.

He notes that extensive green roof soils are typically between 3 and 6 organic by mass but that additional organic matter can be added initially to help to establish young plants. Ph total nitrogen n tot organic carbon c org cation exchange capacity cec electrical conductivity ec and substrate moisture. Greenhouse trials presented here show that relatively minor changes to green roof substrate composition can have major effects on plant growth physiological performance and drought tolerance. Better green roof management for maximum benefits will require characterizing quantifying and understanding the impacts of plant species and building attributes such as aspect slope height and heating on substrate performance and should be considered for future research.

The vegetation properties total canopy cover plant composition species richness were recorded during the growing season.