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0 <br />City of New Brighton <br />Family Service Center <br />Inspee File No.: 211071 <br />April 16, 2009 <br />Page 2 <br />Rooftop Observations (.Reference attached photos and roof plan with corresponding numbers.) <br />1.. Bridging: The EPDM roofing membrane is shrinking and causing the flashing to pull away at. the <br />skylight and wall details, The base flashing is no longer fully supported at either the vertical or <br />horizontal surfaces (approximately 500 lineal feet). <br />2. Field Seams: Field seams were inspected at numerous random locations and cut in one location. <br />The initial observation is that the field scam workmanship and condition is good. The EPDM <br />sheets were joined with 3" seam tape and appear to be in good condition. <br />3. Roof Edge Details: The construction of the primary roof edge at the main roof area <br />(approximately 920 lineal feet) was not constructed to industry standards. Standards for that time <br />period require a membrane securement bar screw through the field sheet fastened 1.2" on -center <br />with 1-1/4" screws and stripped in with EPDM membrane. (See existing roof edge detail #1 and <br />photos I and 2.) <br />4. Ponding Water: The lack of structural slope built-in to the roof deck and lack of a properly <br />tapered insulation system to direct water to the scuppers is allowing the roof to pond or hold a <br />great deal of water, especially in the southwest metal deck area. "Phis condition is exacerbated by <br />the height of the primary scuppers relating to the surrounding roof height. Our test openings <br />indicate that the concrete roof deck areas are insulated with two layers of 3" expanded <br />polystyrene insulation. The metal deck areas are insulated with one layer of 2" and one layer of <br />3", and 1/2" layer of fire rated gypsum board. Tile primary scuppers in the steel deck area appear <br />to be set approximately 1/2" to 3/4" higher than the surrounding roof system, holding back a <br />significant amount of water, so when the scupper heights and insulation thickness issues are <br />combined, it creates a significant amount of ponded areas. The darker areas in the photos <br />represent ponded water (photos 3-6). The weight of the water combined with the weight of the <br />roof system ballast (which appears to exceed industry standards for quantity) can further <br />exacerbate the problem by causing deck deflection. (Please see attached engineer's report.) <br />What our test openings indicated was that initially a 2x4 was anchored to the inside edge of the <br />masonry wall. The EPDM was fastened to the outside edge of the 2x4 and nailed with roofing <br />nails. The remaining wood blocking was installed and then an additional piece of membrane was <br />stripped in prior to the sheet metal installation. <br />5. 14VAC/Mechanical and Skylight Curb Details: The construction at the mechanical and skylight <br />curb details does include membrane securement, however, the height at which the mechanical <br />curbs are set is 5" - 6" above the roof surface, industry standard recommends an S" minimum <br />flashing height. This is most likely because additional insulation was installed without adding <br />additional curb height. When reroofing occurs, additional curb height will be required. <br />6. The majority of the walkway pavers have failed completely, most likely as the result of an initial <br />sub -standard quality, combined with being submerged in water most of the year. <br />PF: H rrwnt;al fartiILd!.>r; Lu dii:TIIs, tiipul IIc.::mJ I 1 C r r�„.;r' ars. ,.;I birutr 1 :;r:+11i ;Mtide.nti r r,rr.�pr, ic.nt�, ar'id ni.rr <br />lith <br />