b'Februar1991 MTROOFER MRCA\'sMonthlyNewsletterforProfessionalRoofingContractors Beware ofMRCA&RIEI PerformanceCo-sponsor SpecificationMay Seminar by Harlan Hanson, MRCA PresidentContinuing its stancethe importance of on education,will co-sponsor a Basic MRCA The following is a description ofRoofingTechnologyseminarwiththe the roofing specificationsforajobwhichweareRoofingIndustryEducationalInstitute currently involved in.(RIEi). The three-day seminar will beheld May 7-10, at the HolidayInnAirport in Written in Section 07530 - Flexible SheetChicago. Roofing System Part 2 - Products TheBasicRoofingsemll;lar Performance:Provide roofing materialsHarlan Hanson, MRCA Presidentcomprehensivelytargetsalllowslope, recognized to be ofcommercial roofing systems. Participants generic type indicated andtestedtoshowcompliancewithwill gain a broad understandingboth the of indicated performances, or provide otherOnorno elevations weretheoretical and practical aspects of the plansdetails,design, similar materials certified in writing bynoted.Only on the structural plans did itspecifications,materialselectionand manufacturer to be equal or better thanshow that the structural pre-cast concretecompatibility, application, workmanship, specified in every significant respect, and.had directional changes.maintenance, repair and quality assurance acceptable to Architect.for membrane roofing systems. When we showed up on the job for a preCompatibility:Provide productswhichroofing inspection we noticed thatofThiscourseisnotlimitedtoroofing most are recommended by manufacturers to bethedrains were locatedmidofcontractors.Allroofingprofessionals roofatspans fully compatible with indicated substrates,the pre-cast.Some of the recast has asinterested in expanding their knowledge of orasmuch as 3" to 3 1/2" ofroofing systems should attend, including provide separation materialsrequiredcamber. to eliminate contact between incompatiblearchitects,engineers,specifiers, materials.Atthistime,wenotifiedthegeneralconsultants,manufacturers contractor that 1/8" slope wouldoff setrepresentatives, physical plant managers, not Afterreadingthesespecifications,wethecamber.Thismeantwecouldn\'tbuildingowners,generalcontractors, turned to the roof plan and details.Theachieve positive drainage.The generaldistributors,componentmanufacturers, plans showed pre-cast concrete deck, draincontractor in tum notified the architect ofcode officials, and insurance officials. locations, curbs and other normal details.the problem we had. On the roof plan was written a statement:Recognized industry experts will deliver "Ballasted membrane roofonThe architect notified the general contractorthelatestinformationondesignand systemrigid insulation.Obtainslopeswithtaperedandourfirmthatbecausethiswasamaterials; the differences between various insulation." Also noted onperformance specification we hadroofing systems; and the most the plan whereto makeappropriate arrows showing direction ofit work.They said that 1/8" slope meantsystem for the building and its intended slope and the following statement:"Slope 1/8" per foot."thata minimum slope. Also, they saiduse.Inaddition,you\'llbenefitfrom was Also between drains, crickets were shown.as roofing contractors familiar with roofingexposuretoanindustryconsensuson over pre-cast that we should have knownroofing problems and solutions as well as Continued on Page 4Continued011Page 4 8725RosehillRoad,Suite210,Lenexa,Kansas66215Phone:(913)599-6600Fax:(913)599-6500'