Green roofs may come in an endless variety of shapes and sizes from high-rise public parks and lush rooftop gardens to tranquil urban spaces, but there is one critical factor that has a major impact on them all — weight.

Green roof weight can range from hundreds of tons for an ‘intensive’ green roof such as a small urban park or garden to just a couple of hundred kilos for a lightweight ‘extensive’ green roof system like Urbanscape featuring a lush mix of sedum vegetation.