6.3. SR 08-13-2012 - Laserfiche WebLink

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Leak Investigation Summary: Based on our observations and water testing, the primary cause of leakage occurring along the ridge of the 1971 ice arena is due to the open gaps between the foam closure piece and metal panels at the ridge cap. The previous attempts to stop the leakage by sealing around the foam closure piece and extending out the ridge cap have failed. Other leakage may be associated with sealant failure at the metal seams and /or fasteners. The metal roofs are in good physical condition with small areas of minor surface rust. A few of these areas have been painted. We believe that the existing metal roofs can last another 15 -20 years with recommended permanent repairs and do not have to be replaced. We recommend performing long term repairs in two phases. (Phase I), which includes removing the sealant from the roof fasteners, sealing the existing seams at the metal laps between panels, installing spray foam at the ridge cap and eves to seal between the ridge cap and metal panels and the metal panels at the eves. Install an Elastomeric Roofing Membrane over these repair areas. The estimated cost to implement these repairs is $ 36,610.00. (Phase II), install an Elastomeric Roofing Membrane over the remaining metal roof area. This should extend the expected life of the building an additional 15 -20 years with periodic maintenance. The estimated cost to cover the remaining roof areas with an Elastomeric Roofing Membrane is $ 45,600.00. SBEC has recommended and performed these repairs on similar roofs and have been very successful in extending the service life of the existing metal roofs and saving the owners substantial amounts of money. The Transportation Building in Eden Prairie had the same repairs completed in 2005 and is continuing to perform without any issues and is expected to perform as intended for many years to come. Some of the water issues may stem from condensation due to occupancy, air flow and existing mechanical systems. Our review does not include a study of the existing mechanical systems. These issues should be looked at after the roof repairs have been completed to separate the water infiltration due to the roof itself, and possible condensation issues. SBEC is currently obtaining estimates for the repairs of the exterior walls and will forward them to the City of Elk River once we receive them. Based on our observations and water test, we believe a large portion of water infiltration is related to the performance of the existing roof components and long term repairs should reduce the moisture issues significantly with completed repairs. Remarks: This is a summary of our visual inspection and leak investigation of the roof and wall systems on the 1971 original ice arena building. We recommend repairing the defects identified in the above report and to perform roof inspections once a year to extend the life of the roof systems. 20