b'N.R.C.AM Convention"Updates" on felts were laid down loose, with theHe stated, "One of the most sigPollutionmastic softening them.The solventnificantimprovementsistheuse OSHAdries the moisture from the top down,ofglassfibersinroofingcomponColdProcessRoofingsaturatingthecoatingandsoftenents of built-up roofing and roofing ing it.After the sun completes theshingles, to replace paper felt,the ThermalShockFactorsdrying there will be no fishmouths,industry standard formany years." ASTMTestsor blisters,explainedCollins.Webelestimated that 55percent Factory MutualMeetingsNBS- OCFResearchProjectoftotalroofingsystemsareusing Future ofFiberglassRobertG. Mathey,NationalBur someitemsmadeof fibrousglass, plus otherindustry matterseau of Standards, Acting Assistanteither in roof insulation, felts, capChief, Materials Durability and An sheets, shingles or in combinations of these products, in both newconThe85th AnnualConventionofalysisSection,gaveacomprehen struction and in re-roofing. theNationalRoofingContractorssivelectureonCriteriaforMem Hecitedthe developmentoffiAssociation,heldrecentlyinLasbraneRoofing,which weexpect tobrous glassare replacing publish in anearlyissueof ABC.mats which Vegas, was the largest, gayest, andstandardmats in the manufacture Hereportedonthestatusof thefelt themostsuccessfulin the historyjointlysponsoredNBS-OCFCorp.ofroofingshinglesforresidential of the Association.project, describing their objectivesconstruction."Useoftheglass It was also one of the most edu and approach.Heemphasized thatm_a~givesmorestrengthand duracational,livinguptotheconven they are trying to develop basic en b1hty and makes it easy to achieve tionthemeof"Up-Date".Adis gineering data ontheproperties ofaClassAfirerating,"he stated. tinguishedgroupofpanelistsandvariousbuilt-uproofmembranes" At least four manufacturers of asspeakersintroducedanumberofand attempting totest meth phalt roofing shingles are nowprotopicsof seriousimportto the in developducingaglassmatshingle,and ods andto measure these dustry.techniquesothersare considering it." basicengineeringproperties. ColdProcessRoofingThey also plan to determine theMr.Webelstated that theuse of glassin roofing materials aids BillSteinmetzand Bill Collins,stresses and deformations that takefiber Midland Engineering Co., Inc., Southplaceinroofingmembranesunderconservationasit is unnecessary Bend, Indiana, reported on their ex different climatic and environmental~ouse rag or paper felts, which are perience with Cold Process Roofingconditions,andtakethis,togethermshortsupply.Inadditionthere materials and presented slideswith the measured engineering prop i~ a shortage ofroofing asphalt, and show smce glass mat requires no impreging some of their jobs.erties, to make recommendations onnatingasphalt,thereisasaving Four yearsago,Steinmetzsaid,the levelsof performance.Matheyofmaterial, even though a heavtheybegan lookinginto thepossi felt that it is unlikely that the pro this bilityofcapitalizingon thetrendject willbecompletedduring thisierlayerofcoatinggradeasphalt towardsincreasedpopularityofyear,becauseofthevastnumberisstillrequiredasthemoisture metal buildings.Coldroof of tests requiredand the uncertain barrier. processtiesinvolvedindevelopingtestHepredictedthatin thefuture, ingisparticularlywellsuitedto - therewill be awideuseof acomthis typeof construction.methodsandmeasurementtech BillCollinsstatedthat oneofniques.However,hefeelsthatb.ination of urethane foam and glass thebiggestproblemstheyfaceisthey have madea significant stridefiberasaroofinsulationandan "Winter" ,inasmuch as sunshine istoward their goal of developing per increaseduseofsprayonfoams formance criteriamembrane roof fortheroofingindustry.Healso required to getgood bond betweenfor amg.foreseestheuseoffactoryfabrithe mastic and thefelts.Hesaid,"Performancecriteriabasedoncated roofing insulation which inte however, if the contractor coats thesolidscientificandengineeringgratesthefirstpliesof built-up feltandthencompletesthejobinprinciples, describedquantitativeroofing in the roof insulation prodthe spring,this factoris critical.inuct.Heexpectsalsotoseethe CollinsdescribedajobinBre termswill help to provide abetterdevelopmentofamethodof using man,Indiana, 700 squares, coveredproductfortheroofingindustry."fi~rou~glassincoldsystemsapwithtwo50#felts,laminated withThe Futureof Fiberglassphcat10nsforrepairsandplant a cold process material, and toppedJames B. Webel,Vice Presidentmaintenance. withasprinklingof granules.HeandGeneral Manager,ArchitecturalIn the prototype stage is another warnedcontractorsthatsaturatedProductsDiv.,Owens-CorningFi newproductinroofinsulation,a felts must never be used with coldberglas,tracedthedevelopment ofprocessby whichurethane foamis process roofing.roofing products during past years,sprayed onfibrousglass to forma Collinssaidthattheysprayedstatingthatthefirstreallymajorcompositeroofinsulationproduct, mastic at the rate of 2 -3 gallons achange and improvementin asphaltconceivablyprovidingastructure minute,emptying a 55 gallon barrelroofinghasbeenmadeduringthe inapproximately25minutes.Thelast fiveyears.Continued on next page 8MARCH, 1972'