A multi-level green roof to beautify a college campus building
Douglas College Campus Building
Douglas College wanted to add a green roof to an existing 5-story campus building in downtown New Westminister, BC. Their goal was to do something about something, and save money on something at the same time. Summarize their goals and how this project addressed them.
The block-long building is on a steep hill, so has a multi-level design. This required installing 7 separate green roofs to cover all the rooftops - 15,500 square feet in total. Architek provided the expertise, materials and installation for the project, working closely numerous stakeholders.
Green Roof Design & Functionality
Many of the building's 7 roofs can be seen from windows on the same or higher floors. Some roofs are also adjacent to outdoor seating areas and rooftop walkways. This made the roofs' aestetics very important, so 11 different plants plus some accessories were used to add color and flair.
Some of the roofs were planted with a mix of something, something and something sedums that turn into an explosion of color each fall when they flower. Other roofs use a mix of low sedums, tall native grasses and bright something, emulating a beautiful spring meadow. Old Town ceramic planters containing small trees were added around some of the seating areas to add to the park-like feeling of the roofs.
|Project||Extensive Green Roof retrofit on an existing instituational building|
|Location||Royal Avenue, New Westminster, BC|
|Cost per Sq.Ft.||$15,50, including installation|
|Warranties||RCABC + Zinco Canada, 10 years on membrane + 5 years fit for function on living roof|
Products, Materials & Methodologies
Green Roof System
- Zinco green roof build-up: Floradrain FD 25 - mutliple areas
Grow Medium & Planted Materials
- Sempergreen pre‐grown sedum mats with 11 sedum species in mix.
- Grow medium from Sumas Grow Media specified @ 100mm by Architek/Zinco Canada.
Roof System Build-up (top-down)
- Plant materials
- Grow media, ZinCo Extensive, 26cm depth
- Filter sheet, ZinCo SF
- Drainage element: Zinco Floridrain ® FD 25
- Moisture protection, ZinCo Mat SSM 45
- Root protected waterproofing
- Roof construction
INSERT ROOF BUILD-UP GRAPHIC HERE
People & Organizations Involved
|SOMETHING Architect||CJP Architects|
|Landscape Architect||PWL Landscape Architects|
|General Contractor||Dominion / Stuart Olsen|
|Roofing Consultants||Architek SBP, Raven Roofing|
|Green Roof Installation||Architek SBP|
|Growing Medium Consultants||Architek SBP, Sumas Grow Media, Zinco Canada|
|Technical Consulting||Architek SBP, Zinco Canada|
|MEP Engineering||Zinco Canada|