6.13. SR 07-08-1996 - Laserfiche WebLink

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"l 5801 Duluth Street, Minneapolis, MN 55422 · Ph. 612-546-3434 Fax 612-546-8669 555 West Layton Ave., Suite 420, Milwaukee, WI 53207 · Ph. 414-744-6962 Fax 414-744-6981 ~ngineering & ArcJ~'teCrural services ~or root~, pavements, exterior waJls, and outdoor sports Facilities. ,,4}NSPEC, INC. PROJECT: 1996 Reroofing the Elk River Public Library City of Elk River REPORTED TO: Mr. Clifford Skogstad City of Elk River P. O. Box 490 13065 Orono Parkway Elk River, MN 55330 DATE: May 29, 1996 FILE: M960507-03 COPIES TO: SCHEMATIC DESIGN SUMMARY As discussed on May 22, 1996, we are sending you information regarding roof system options and our opinion of probable construction cost for the above referenced project. EXISTING CONSTRUCTION On April 13 and 22, 1996, INSPEC, INC. conducted field verification of the existing roof system for the Elk River Public Library. During the field verification, test openings were made through the existing roof system to the existing structural deck. Test openings were also made at roof edges, expansion joint curbs, and an obsolete skylight curb. The existing roof system is a IRMA roof system consisting of 1-1/2" diameter aggregate ballast over a filter fabric laid loose over a 1" extruded polystyrene insulation laid loose over a 45-mil loose laid EPDM membrane over 1.7" extruded polystyrene insulation mopped to a two-ply organic asphalt underlayment mopped to a one-ply red rosin underlayment tack-nailed to the existing wood deck. At some of the test cuts taken, water was found in the system between the membrane and the underlayment. Because of the wet conditions of the existing roof system materials, it is not recommended that any of these materials be salvaged and used in the new system. The original construction documents show a conventional gravel surfaced built-up roof. The current IRMA roof system in place was installed approximately 8 years ago according to local personnel. Documentation of this system was not available for our use at this time. PROPOSED SYSTEMS It is our opinion, based on field verification of the existing conditions on this area along with an understanding of your needs and expectations, the viable roof system options include the following: As a mutual protection to clients, the public and ourselves, all reports are submitted as the confidential property of clients and our written authorization is necessary to publish any statements, conclusions or extracts from or regarding our reports.