Understand the opportunities—and what makes them work.
Benefits by design
A carefully designed mix of planting and habitat features can support wildlife in built-up areas. Ecological value depends on species, substrate diversity, local context and ongoing care—not simply on the presence of greenery.
Vegetation and substrate retain some rainfall and can slow runoff. Performance varies with weather, moisture and system design. Where controlled discharge is required, a coordinated blue-green solution may be appropriate.
A suitable build-up can shield waterproofing from direct sunlight and temperature exposure. This does not remove the need for correct detailing, a compatible membrane or maintenance.
Plant cover and evapotranspiration can influence roof temperatures. Building energy savings depend on insulation, climate and the roof design, so a universal savings figure would be misleading.
Planting can improve outlooks. An intensive roof designed for safe access may also provide garden or amenity space; extensive roofs are not automatically intended for public use.
Green roofs can contribute to landscape, ecology and drainage objectives. Planning approval or an assessment credit is not automatic: the relevant requirements need to be addressed by the project team.
A balanced decision
Structural loading, waterproofing, drainage, wind and fire considerations must be assessed. Installation access and material handling also affect cost and programme.
Planting needs establishment and maintenance, with safe access to outlets and inspection points. Agree who will care for the roof and budget for that from the start.
From our project portfolio
Your next step
Tell us the project location, approximate roof area, whether it is a new or existing roof, and what you want it to achieve. Drawings and your current project stage help us give more relevant guidance.
Discuss your roof with our team
