Green Roof Requirements London

That s 17 5 hectares or around 25 football pitches.

Green roof requirements london.

Our services find out what we do and how we do it. At green roofers ltd we work on every aspect of green roofing from growing our plants to installing unique and inspiring green roofing systems. Intensive roofs which are thicker with a minimum depth of 12 8 cm 5 1 16 in and can support a wider variety of plants but are heavier and require more maintenance and extensive roofs which are shallow ranging in depth from 2 cm 13 16 in to 12 7 cm 5 in lighter than intensive green roofs and require minimal maintenance. Click on a green roof to see a short description of the green roof type and the estimate of the area it covers.

There are two types of green roof. Flowering from march till november these roofs require deeper substrate which is undulated to encourage diversity. The industry was demanding solutions that combined the contractor needs for ease of installation with owner requirements for sound long term horticultural performance. It was developed in response to the needs of the fast expanding green roof industry in major north american cities.

Native uk wildflowers often make great green roof plants and are particularly good for providing food sources for invertebrates for longer periods of the year. The report features the first complete map of green roofs in the whole of london. Weight vegetative roof weights can range from 16 to 60 pounds per square foot depending on the depth of the growth medium types of plantings and accumulated weight of other additions such as pavers or water features. Our green roof map below shows there are around 700 green roofs in central london alone covering an area of over 175 000m2.

That product is the liveroof hybrid green roof system. The green roof must cover 100 of the roof that includes appropriate vegetated free zones with up to 40 exemptions for rooftop mechanical equipment. Excellent architecture and urban design is required if. The department considers the vegetation layer to mean the layer of a green roof consisting of live plants such as sedum or equally drought resistant and hardy plants spaced so that they cover at least eighty 80 percent of the layer by the compliance period deadline.

This map will form the centrepiece of a detailed infographic on the types areas density of green roofs per inhabitant. A league table of green roofs cities around the world in terms of density of green roofs per urban inhabitant.