Rowan Tree Dell

Contributor:
Dave

Address of Roof:
Sheffield, S17

Architect:
Self Built

Type of Development:
Wood shed

Type of Roof:
Extensive Sedum

Size of Roof:
Approx 8  square meters

Reason for green roof:
Environmental and aesthetic

Materials used:-
Frame-Re-cycled materials from skips

Carpet re-cycled from skip

Seed mix – Jelitto

Gravel- local builders merchant

Estimated cost-
£60

Details of Green Roof Element:
I covered the existing felt roof of my woodshed with a waterproof visquene membrane. This was then covered in a re-cycled wool carpet taken with the owners permission from a local builders skip. I then used an old stud wall as the frame again taken from the same builders skip which was cut and screwed to fit the roof to provide a frame. I ordered the minimum quantity of green roof sedum seed mix from Jelitto’s seed merchant and mixed it in damp sand which was placed in the fridge for 10 days for the seed casings to activate. During this time I filled the compartments of the frame with a mix of 90% pea gravel 5% sand and 5% compost. The damp sand/ seed mix was then spread thinly in each compartment and watered in on a weekly basis throughout June and July resulting in the roof pictured. Interestingly the lower edge of the roof has grown faster than the rest. Some of the sedum flowered in the first season in late August 2007

Completion Date June 07

Slope:
Approx 15 degrees