BU533 Green roofs - an overview

Green roofs are basically roofs with plants. Also described as ecoroofs or living roofs, they are characterised by plants growing in an (often) lightweight growing medium over a waterproof membrane.

This bulletin presents an overview of design considerations for green roof systems.

The bulletin covers:

• advantages of green roofs
• types of green roofs - extensive and intensive
• design considerations, including statutory requirements, structural requirements, visual aspects, safety and accessibility, costs, warranties and insurance
• drainage and waterproofing membranes
• media and mulches
• plant materials
• maintenance.