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Ecology Ecoretrofit Encouraging wildlife and nature Green roofs Retrofit sustainability

Building a green roof in South London

New green roof in South London with gabion cages for the sides, insulation and biodiverse planting.

I spent a few days building a new roof in South London. We used gabion cages filled with a mixture of large stones and logs to create habitat.

I also used a time lapse camera for the first time to try and capture building the roof. I have divided it into 3 sections, first the set up, including adding some insulation. We used gabion cages from Devoran metals for the edges https://devoran-metals.co.uk/

Edges and protective fleece in place

After this we added a drainage layer of aerated clay pebbles, these also add to the insulation and help to reduce overheating.

Drainage layer is added

I struggled a bit with the speeds and lapse times for the videos but slowly getting better. The next step for the roof was to top up the gabion cages and add the soil, we were using Shire substrates who supply an excellent green roof mix.

Soil goes on

Finally planting and seeding. I worked with Rotherview nurseries to get an excellent selection of plants that are growing well at this time of year, including several sedums, campanula and Armeria. We also added lots of wildflower seeds that will start to show their heads in spring or before.

Planting

Overall, we were pretty pleased with the roof as was the client. Looking forward to seeing it develop over the next few years.

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