What it costs: Green roofs | Features

Specification options: green roofsCapital costNet present value for 60 years
	£/m2	£/m2
Extensive green roofs
Sedum mat pre-grown 20-30mm substrate	45	55
Sedum pre-grown plug planting 75mm substrate	33	42
Intensive green roofs
Semi-intensive grass, herbaceous plants, 120–200mm substrate	30	44
Intensive low-lying shrubs and coppices, 150–250mm substrate	35	51