SYSTEMS

The most popular type of green roof, sedum roofs are extensive green roofs that have a total depth of 3 to 8 inches. They may include a granular drainage medium (multi-course) or a synthetic drainage layer (multi-layer).

Perennial roofs are semi-intensive green roofs with a total depth of 8-14 inches & may need irrigation, depending on the regional climate and the kind of plants used. This rooflite soil system supports taller plants that need more
root space.

Rooftop lawns are semi-intensive green roofs with a total depth of at least 8 inches. This rooflite soil system supports lawn grasses that require deeper root space & thrive on a soil with plenty of finer particles & the precise amount of organic matter.

Rooftop gardens are intensive green roofs that have a total depth of 14 inches up to several feet. Rooftop gardens are truly “landscaping the roof” and frequently offer accessible amenity space along with lush vegetation with a variety of plant options.

Rooftop trees are a special category of deep intensive systems. With a total depth of 20 inches up to several feet, they require two different types of media to provide the right mix of aeration & organic matter for the deeper root zone.

Planters & containers are essentially miniature rooftop gardens that have a total depth of 14 to to 18 inches or fall within the deep intensive category. They require high-performance growth media to ensure plant growth, health and longevity.

Rooftop farms are intensive green roofs that have a total depth of at least 12 inches, depending on the crops grown. This rooflite soil system supports agricultural production on rooftops, including fruits and vegetables.