White Rock Green Operations Building
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The White Rock Green Operations BuildingProject Name: White Rock Green Operations Building
Year: 2003
Owner: The City of White Rock
Location: White Rock, BC, Canada
Building Type: Municipal/Government
Type: Extensive, Test/Research
System: Single Source Provider
Size: 1453 sq.ft.
Slope: 1.64%
Access: Accessible, Open to Public
Submitted by: BCIT CAGRT

Designers/Manufacturers of Record:
Architect: Agatha Malczyk, Busby + Associates Architects
General Contractor: Marvin Kale, KDS Construction
Engineer: Duane Palibroda, Fast + Epp
Landscape Architect: Wendy Grandin
Greenroof System: Soprema
Roofing Subtrade: Bollman Roofing
Photos Courtesy of BCIT Centre for the Advancement of Green Roof TechnologyPhotos Courtesy of BCIT Centre for the Advancement of Green Roof Technology
Client: The project was built for a civic client. White Rock is a community with a population of approximately 17,000. The City of White Rock legislated a "Sustainable Agenda" for all infrastructure projects. The goal is to encourage sustainable design in the whole community, lead by example and set new standards.

History: Decommissioned sewage treatment plant is located on site. The building replaces an older Operations Centre, which became inadequate for city needs.

Site: The site is south sloping with a view to the sea. Foundations of the old building and tank walls were reused as basement and foundations of the building.

Challenges: Small budget, expectations of high building performance, LEED Gold certification.
Build-up of roof: The roof decking consists of 38 x 140 mm salvaged fir. The roof structure is based by 100 x 300 mm salvaged wood joists.

The green roof system was provided by Soprema, using the "Sopranature" System:

- Waterproof membrane: 2 ply SBS sopralene Flam Jardin (roof barrier contained)
- Vapour barrier: SBS membrane with glass fiber reinforcement (sopraseal 60)
- Insulation: R30 Rigid Insulation; closed cell polyisocyanurate foam insulation
- Protection layer: Impregnated asphalt fibreboard
- Drainage layer: Sopradrain PSE, polystyrente panels
- Filter cloth: Soprafiler, non-woven synthetic geotextile
The Growing medium was provided by Stream Organics Management, as an equal volume of sand, white pumice and compost amendment. Depth of the Growing medium: 4"-6" (100 ? 150 mm)

At time of planting, species included, Thymus serphyllum, Sedum spurium, Penstemon davidsonii, Lavendula augustifolia, Thymus languinosus, Sempervivum tectorum, Festuca ovina glauca.

Additional thumbnail photos:

Learn more from these contacts: BCIT Centre for the Advancement of Green Roof Technology: www.greenroof.bcit.ca; info_greenroof@bcit.ca; The City of White Rock: www.city.whiterock.bc.ca/2005City-Operations/City-Operations.html; Busby + Associates Architects: www.busby.ca.
 
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