This green roof garden was constructed in London some years ago..just as ‘Green Roofs’ were becoming popular, we used this modular construction to great effect, managing to hide all the A/C vents etc, that usually clutter a roof..
The garden was an addition to the staff restaurant on the third floor, so we were lucky to be able to use a wide selection of plants, as it rarely got too cold, although snow loading etc, was a serious consideration.
By having a large amount of planting around the building edge we were able to keep people from getting to close to the edge , helping reduce the need for high barriers.
The project won a number of awards at the time, and gave us valuable insight into designing, constructing and subsequently maintaining a green roof.
Here you can see the simple framing that this modular system uses, not only is it strong, but having been treated it is very long lasting – at least 50years.
Beneath the grid is a typical weed barrier, free draining medium etc, to keep the roof from retaining any water. The grid cells were lined and filled with a soil less planting compost and a typical drip irrigation system installed on top.
Our only challenge was a couple of mallard ducks that insisted on nesting in one corner of the garden – we left them to their own devices !