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• City of New Brighton Family Service Center Inspec File No.: 211071 April 16, 2009 Page 2 Rooftop Observations (Reference attached photos and roof plan with corresponding numbers.) 1. Bridging: The EPDM roofing membrane is shrinking and causing the flashing to pull away at the skylight and wall details. The base flashing is no longer fully supported at either the vertical or horizontal surfaces (approximately 500 lineal feet). 2. Field. Seams: Field seams were inspected at numerous random locations and cut in one location. The initial observation is that the field seam workmanship and condition is good. The EPDM sheets were joined with 3" seam tape and appear to be in good condition. 3. Roof Edge Details: The construction of the primary roof edge at the main roof area (approximately 920 lineal feet) was not constructed to industry standards. Standards for that time period require a membrane securement bar screw through the field sheet fastened 12" on -center with 1-1/4" screws and stripped in with EPDM membrane. (See existing roof edge detail #1 and photos I and 2.) 4. Ponding Water: The lack of structural slope built-in to the roof deck and lack of a properly tapered insulation system to direct water to the scuppers is allowing the roof to pond or hold a great deal of water, especially in the southwest metal deck area. This condition is exacerbated by the height of the primary scuppers relating to the surrounding roof height. Our test openings indicate that the concrete roof deck areas are insulated with two layers of 3" expanded polystyrene insulation. The metal deck areas are insulated with one layer of 2" and one layer of 3", and 1/2" layer of fire rated gypsum board. The primary scuppers in the steel deck area appear to be set approximately 1/2" to 3/4" higher than the surrounding roof system, holding back a significant amount of water, so when the scupper heights and insulation thickness issues are combined, it creates a significant amount of ponded areas. The darker areas in the photos represent ponded water (photos 3-6). The weight of the water combined with the weight of the roof system ballast (which appears to exceed industry standards for quantity) can further exacerbate the problem by causing deck deflection. (Please see attached engineer's report.) What our test openings indicated was that initially a 20 was anchored to the inside edge of the :masonry wall. The EPDM was fastened to the outside edge of the 2x4 and nailed with rooting nails. The remaining wood blocking was installed and then an additional piece of membrane was stripped in prior to the sheet metal installation. 5. HVAC/Mechanical and Skylight Curb Details: The construction at the mechanical and skylight curb details does include membrane securement, however, the height at which the mechanical curbs are set is 5" - 6" above the roof surface, industry standard recommends an 8" minimum flashing height. This is most likely because additional insulation was installed without adding additional curb height. When reroofing occurs, additional curb height will be required. 6. The majority of the walkway pavers have failed completely, most likely as the result of an initial sub -standard quality, combined with being submerged in water most of the year. A" t3 Ml{ I ua I plc_h-.�( I OF to c (=nI�,, tate puhdic and N!,I7L-:C.. d if, subrIirtted ^s ih ,, )Ii�J(Je.IIIi(+I 1'.�rpF,�Cr't c f �.�. if�0,, A FJ crLn wiU.+-rl 8ut wrilatiii( is n<.ee 'try l< Fa.ii,b;h any t Itrir rul:; _tirl:sivn,> or extr act; Irc.nn r rr :;ard r r >ur re a rf.