Comparing 2 Technical Reports

Felton Properties Green Roof Report 400 SW 6th Ave Portland, OR

400 Building

Introduction: The ecoRoof will combine innovation with practicality. The building is currently seeking LEED Gold certification, and ecoREAL will work in an integrated fashion with roofing experts specializing in weatherproofing, structural engineers and green roof companies specialized in the bio- regions native plant species to come up with the best design and function for meeting the building overall green building goals. Water drainage, low-impact design and aesthetic will be looked at simultaneously. At each layer of the green roof sustainable design attributes will be assessed for regional material (especially vegetation) and recycled content (such as the HDPE geo-cells) in the drainage system along with triple bottom line life-cycle assessments on how the project affects the context (such as HVAC systems, and surrounding buildings). Since the building is on a zero- lot, the green roof grant is critical for pursuing LEED certification relating to both Sustainable Sites and Water Efficiency credits. The green roof would augment Felton Properties commitment to retrofitting their existing building stock to be more sustainable.

Left: Looking South over green roof installation Right: Looking Northeast over green roof installation

Project Type Commercial retrofit

Technologies Malarkey roofing tray system 2000 sqft Tuff Stuff - Sedum Tile

Major Benefits

Stormwater management - limit disruption and pollution of natural water flows by managing stormwater runoff. Heat Island Reduction - reduce heat islands to minimize impact on microclimate and human and wildlife habitat.

Cost $70,192.00 Constructed

.O.  Box  17217,  Portland,  OR  97217-­0217

Telephone:  (503)  283-­1  www.MalarkeyRoofing.com

.O.  Box  17217,  Portland,  OR  97217-­0217

Telephone:  (503)  283-­1  www.MalarkeyRoofing.com

System Components: AVRS Tray System

System Components: Tuff Stuff – Sedum Tile Technical Data Vegetation – 95% coverage Fiber/Soil Base – Approx. 1” thick Measurements – 15”w x 20”l x 2”-3”h Area = 2.08 sqft per tile Max weight – 4.5 #/sqft fully saturated Irrigation: No irrigation was used on this project. The tray system chosen was designed and planted to not utilize any irrigation system. Budget: Existing Roof make minor tune up repairs At window washer davits and supports, clean and reseal all with SBS modified mastic and with granules Make misc. minor repairs and reseal all pipe penetrations At west parapet reseal parapet cap metal flashing joints Total: $9,900.00 Green roof option 10% of total roof area 2000sqft Install 1/8 inch protection board underneath green roof trays, 2000sqft Install Malakey roofing tray system with fully mature plants, 2000sqft Provide crane service to load green roof trays to roof at SW side of building ($9,211.00) Total: $60,292.00 Success and Lessons Learned: In beginning our search, it was important to find a green roofing option that required little maintenance. We were successful in finding the perfect selection after a little research. By choosing a drought resistant choice, the maintenance requirements change drastically. Doing our research ahead of time helped tremendously in terms of setting goals, but having a seamlessly coordinated team from the beginning would have helped. In the future we realize the importance of connecting the roofing contractor with the green roof manufacturer and the nursery providing the vegetation, in order to make sure all of the project goals are met with few setbacks and no change orders.

400 Rooftop plan showing dimensioned green roof.