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● I conclude that after enough water pools on the roof, it simply drains off the roof edges <br /> and runs down the sides of the block wall. <br /> ● I believe that this runoff water is finding its way through porous parts of the blocks, and <br /> eventually finding it’s way down through the wal until it drains out of the interior side of <br /> window openings. <br /> ● Typically windows are designed to shed water through exterior facing drainage holes <br /> located on the bottoms of windows. It appears that the bottoms of the windows are <br /> caulked. I think this might be improper, as it would block potential drainage holes and <br /> cause water to backup and exit out in the building interior. <br /> ● There does not appear to be a water break drip ledge at the exterior tops of window <br /> openings. In buildings I’ve constructed using concrete blocks or prefab concrete walls, <br /> I’ve typically seen a drip ledge installed to capture water that may flow down the sides of <br /> the walls, and prevent it from entering the concrete walls via capillary action. <br /> ● I surmise that the reason water is not leaking through the transaction window is because <br /> the small covering roof section is preventing water from entering the porous bricks in that <br /> location. <br /> ● I conclude that the combination of the flat roof system and the window assembly are <br /> either inappropriately designed and/or constructed so they do not work together for <br /> proper shedding of water. <br /> RECOMMENDATIONS <br /> ● The caulking at the bottom of the windows appears to be incorrect. I recommend that <br /> the window manufacturer be consulted to determine: <br /> ○ Are drainage holes located in these windows? <br /> ○ Is it proper to caulk the bottom of windows? <br /> ○ What is the manufacturer ’s recommendation for setting these windows? Is there <br /> a specified setback from edge of block that is recommended? <br /> ● I recommend resetting the four (4) windows where leaks have been observed, and <br /> ensuring a water break is installed. <br /> ● Water must be directed off the roof to intentional locations. If it were a larger building, I <br /> would recommend roof drains. But since the surface area of the roof is small, I <br /> recommend in this case just constructing a pitched roof over the top of existing. The <br /> pitched roof should slant toward one side of the building, with a gutter and downspout <br /> system that will capture and divert water away from the structure. <br /> ● I recommend new pitched roof framing, decking, and surfacing. A small amount of <br /> exterior siding will be required since the roof will be pitched. Also gutters and <br /> downspouts are recommended. Based on current prices and assuming a metal roof, a <br /> budget allowance of around $12,000 should be sufficient. <br /> QUALIFICATIONS & CLOSING <br /> Nathan Robinson has a BS in Applied Physics, and Masters in Engineering. He was as a <br /> consulting engineer for many years prior to starting Landmark Management Partners, LLC. <br /> 2 <br />DocuSign Envelope ID: 98E08666-AD28-4C71-B18C-807DF6EC693D