Extensive green roof projects consist of shallow, widespread planting and typical coverage of mosses, sedum and grasses. They are popular in commercial and domestic properties and can provide a haven for wildlife.
Once established, extensive green roofs require little or no maintenance, evolving naturally as an environment.
Intensive roofing systems typically have a deeper planting layer, so can encompass a wider variety of planting. This often includes bushes and shrubs, landscaping and trees, so requires some maintenance once completed.
These types of systems are popular in commercial settings, as they can be used to create roof gardens and terraces. This is why surveys and inspections are often required for commercial intensive green roofing, to ascertain the load bearing capacity.
Brown, or biodiverse green roofing projects are designed to provide alternate habitat to compensate for the sharp increase in the use of brownfield land for development on the fringes of cities and large towns.
Sometimes referred to as rubble roofing, brown roofing is typically close in planning and planting to an extensive green roof.