b'MRCA TOMEETIN MAHA THETWENTY-FOURTHAnnualcoveringtheusesandapplicationof ConventionandTradeShowofthetaperedroofinsulationinbothnew Midwest Roofing Contractors Associa constructionandin re-roofing. tionwillbeheldonNovember11-14,Therehasbeenagreatdealof 1973,attheOmahaHiltonHotel,discussiononthesubjectof Omaha, Nebraska."Masterspec",theA.I.A.ComputerOn the program are topics that are ofized SpecificationSystem,whichwas utmost importance to roofing contrac introducedto the roofing contractors tors, relating to a numberof problemlastyearattheColoradoSprings areas. A touchy subject, and certain tomeeting.Theproponentsofthenew provoke heated arguments frombothspecification technique argue that only roofing contractors and manufacturers,through standardization can time and isthesubjectof"asphaltHeatingcost control be effectivelyachieved. Temperatures". MRCA\'s TechnicalBriefly, the master specifications onIndoors, checking the temperature just prior Committee,workingdiligentlytoall phases of construction are stored onto mopping. compile field test data on heating andcomputer tapes. When an architect or applicationtemperatures,willhavespecwriterneedsdata,heusesanHeat1ng somestartlingresultstosharewithinquirycardfedintothecomputer, their audience. The bone of contention isthatthemanufacturersrequireawhich in turn prints out guide specifi Hcomparativelylowkettleortankercations.To produce the project specs,OTSTUFF . temperaturefortheasphalt,whichtheguidespecificationsfromthe makes it impossible to apply a uniformmaster tape are modified by adding or coatingbetweentheplies,asthedeleting information, words or sectionsCorrect to meet specific needs. This is fed back asphaltcoolsrapidlyduringtheinto the computer to produce the finalMelting Temperatures moppingapplication,sometimesas muchas150 F.in 20 seconds.project specification which is used withA CONCERNED group of men met Temperature at the application pointthe blueprint drawings.in Kansas City last Augustto discuss hasabearingontheprobabilityofComputerizedsystemsareheretothesubjectofproperasphalt blistersandfishmouths,theysay.stay. What is needed are complete andtemperatures in the kettle and tanker, Moisture, of course, has been the mosteffectivecommunications betweenallaswell ason theroof asitisbeing frequent culprit of blisters in the built factions of the building industry with amopped. up-roof.However,contractorsreportclear-cutunderstandingoftherightsPaulMorris,SellersandMarquis that they have inspected many blistersand obligations of each of the parties.Rfg. Co. Kansas City, Mo., and MRCA with no trace of moisture. The causesStandardizationcaneasilyleadtoResearchCoordinator,hadinviteda of blisters, and what affect, if any, theycomplications for the roofing contrac groupofrepresentativeindustry haveonthe performance of therooftor. Careless editing can lead to specifi members such as the Asphalt Roofing and its durability will also be discussed.cationsnotpertinenttotheproject.ManufacturersAssociation,Roofing Are-roofingpanel,composedofProgramingorinquirycarderrorsContractors, as well as several manuseveral MRCA directors, will present acould lead to disasterous results.Thefacturers to participate in a controlled numberofre-roofingmethodsandquestioniswhowilltakethetesttodeterminethetemperature techniquesthat willmakemoneyforresponsibilityfortheseerrors.Wedropfromthetimetheasphaltis thecontractor.Theyaretestedandknow they will happen.istheredrawnfromthekettlespigottothe workable, resulting in a more efficientanyone who hasn\'t had a problem withtime it is mopped on the deck. operation.acomputerbilling?TheseproblemsMorris,speakingonbehalfofthe Today\'sinflation,highcosts,andshould be resolved along with a host ofcontractors,describeda jobaccepted materialshortageswillinsureanothers, or the roofing contractor will beby a contractor, that contracturally can interestingsessionon"TheWhys,the one facing the consequences. alonenot be done. The specifications require Hows,andWhereforesofRoofingwhen the specs containa clausethatanasphaltapplicationrateof15-25# EquipmentOperationandMainten reads.roof shall not leak."persquare,withthekettletemper"the ance",with contractors who have cutAllinall,theseexcellentandaturenottoexceed450F.,andthe their own costs,describinghowtheypertinenttopicspromisealivelyinstallationtemperaturenottogo handlethisphaseoftheirbusiness.convention.Thevarioussocialbelow 350. However,Morris pointed MRCA has scheduled two sessions onactivities and the ladies program willout, this is not consistant as at 350F., roofinsulation.Onewillincludeaadd to the exciting meeting coming up.the high viscosity of the bitumen,put generalanalysisofalltypesofroofIt is not necessary to be a member tothe rate ofapplicationat48-5211per insulation,withthesecondprogramattend the convention.square, double the amount specified. 8ABC, October 1973'