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Roofine Options Johnson * Controls During the detailed survey of the buildings, the Garland Company was brought in to evaluate the City's roofs. Garland works with many Minnesota cities to establish long -term roofing programs and provide lowest life -cycle cost roofing systems. It is Johnson Controls' philosophy to evaluate opportunities to incorporate "green" whenever possible. A good candidate for a green roof is a roof that is large and flat. A green roof should be considered as a replacement option. A green roof is partially or completely covered with vegetation and soil. A local, natural- growing medium, planted over a waterproof membrane provide a nature footprint on the site. This does not refer to roofs which are merely colored green, as with green shingles. A green roof may also include additional layers such as a root barrier or irrigation system. Some of the benefits attributed to green roofs include reduced energy consumption, improved sound insulation, aesthetics and storm water management. We would research the availability of grants, incentives or rebates to "go green." The rubber roof at the City Hall has performed well to date, but is nearing its expected life of 15 years. The City has done excellent maintenance on the roof, but the membrane roof eventually wears out to the point of failure. When this occurs, perforated leaks occur in multiple locations and can be difficult to locate. The maximum the city could expect this roof to last is another 3 -5 years. Two options are presented to replace the roof at the city hall. The first, is the replace the roof with a 30 -year warranty 5 -ply built up roof system. This roof will last approximately 40 years; this is over double the life of a normal EPDM roof. The Second option would be a partial green roof on the city hall. The section that would be green is middle section of the building. (See map below Section 13) This could be designed with a walking path and other features to help display the roof. Also, the roof at the City's water tank has foam insulation around the tank. This would be a good location for a green opportunity. Designs could be laid out to display the St. Anthony Village name on the roof for all to see. While doing this analysis, it was brought to our attention that the city is looking at a program that will take just about all of the rain water from the roof of the city hall and divert it into a holding pond. The green roof does provide several additional benefits of reducing cooling and heating loads, but is mostly paid for by the elimination of rain water going into the sewer. It would be the recommendation of Johnson Controls to not do the green roof at this time. Page 27 City of St. Anthony Village PRORPI Performance Contract Analysis ETARYAND CONFIDENTIAL NOT TO BE REPRODUCED OR DISTRIBNTED YNT!%)UTJOHNSON CONTROLS' PERMISSION