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Vertical cracks in the precast concrete panels <br />were observed throughout the entire building. <br />Some of the vertical cracks were located above <br />the East doors where leakage has been reported. <br />- ~ z ~ ,~ <br />,w.....rf- - <br />~` <br />C k i , <br />T 1 F t V <br />Rt ~ 3 e ,. <br />~ ~ ~ ~ ~ ~ }}F ~ ~ ~f <br />Leak Investigation Summary: <br />Based on our observations and water testing, the primary cause of leakage occurring along the North wall <br />of the newer building is due to the vertical cracking in the precast concrete panels. We recommend <br />performing long term repairs on all vertical cracks along the North elevation above the roof using <br />appropriate materials and repair procedures. These repairs should also be implemented on the remaining <br />parts of the building above windows and doors. The sealant in the existing control joints are weathered <br />and beginning to deteriorate. It may be more cost effective to replace them when doing the crack repair <br />rather than return in a few years to replace them. <br />The rubber roof membrane is also surface mounted to the wall using termination bar and sealant. The <br />sealant is the primary means to stop the water from entering at the termination bar and going behind the <br />rubber membrane. Much of the sealant is deteriorated or un-bonded which could allow water infiltration <br />into the building interior. The sealant should be replaced at the termination bar the entire length. <br />A new reglet should be saw cut at an upward angle into the smooth surface of the concrete panels to <br />allow a new two piece sheet metal counter-flashing to be installed (see attached detail). This will not only <br />cover and protect the sealant at the termination bar but it will also allow a simple means to tie into the <br />new roof in the future when it is replaced. <br />Remarks: <br />This is a summary of our visual inspection of the roof systems on the various roof sections of the rubber <br />EPDM roofs. We recommend repairing the defects identified in the above report and to perform roof <br />inspections in the spring and fall to extend the life of the roof systems. <br />24 <br /> <br />