|Completed in April, 2004, the 5m x 4m Garden Studio is cut into a 1 in 3 hillside, self-built in autumn 2003/spring 2004, entirely in timber and entirely suspended (walls and floor) from two recycled steel beams beneath the roof, bearing on a previously existing concrete retaining wall at the top (back) of the slope and blockwork piers at the front.|
|The roof build-up comprises:|
- meadow grass and indigenous flowers
- on 150mm native clay topsoil
- on geotextile filter membrane
- on Erisco Bauder expanded polystyrene insulating reservoir boards (?11/m2)
- on 1200g polythene root barrier membrane
- on 50mm extruded polystyrene insulation
- on 2 layers polyester fibre reinforced bituminous roofing felt
- on 18mm external grade plywood laid to 1:40 falls
- on 250 x 50 tanalised FSC softwood joists
- single 75mm roof outlet to internal downpipe draining to stone filled soakaway pit
- summer irrigation by redirected roof downpipe and bath/shower-water drainage stack.
- 150mm soil layer is too shallow and needs to be watered during extended periods of hot dry weather
- cutting grass too early in season inhibits regermination of less hardy flowers
- cutting grass too late in season leaves roof looking bare through the winter.
Architect/owner David Foster says it has been a great 2010 spring for wildflowers in the UK - the center photo and the left side photo below show the more mature green roof:
Additional thumbnail photos:
|For more information regarding this project, contact the owner/designer David Foster at: firstname.lastname@example.org.|
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