b'ofanewproductintroducedbyhis firm,CallendriteS.A.,whenin1955 theyinstalledaplasticfilmand bitumen roof, self-insuring it on all jobs until 1964. In that year, they contacted theinsurertoinspectanumberof roofing jobs andto approve the new systemforfuturejobs.Theinsurer Paul Morris- G.Stephensongranted approval only on concrete slab failures,"saidBove,"Itisaverydecks,andnow,in 1973,nineyears comfortable situation."later,theyareaskingtogetan This is not to say that there are noextension of the ten-year guarantee to problems,heexplained.Misunder coverinsulationboardcoveredwith standings,misinterpretationsandthe system. Will Resenow, Chicago Contractor andotherdifferencesarisebetweenthe"It is an expensive problem,"Bove contractors,specifiersandmanufac said,"buttodaywhenwesellthis Erskine Franklin debate roofing prac material tocontractor, we are sure of turers.However,generallyspeaking,a tices during a coffee breakhesaidthat the"lifeof theroofingwhat we are doing. The contractor who at the Aspen Conference.contractor is not menaced, if hedoesuses the product doesn\'t take any risk." the job correctly."BECOMING AQUALIFIED OSInFrance,acontractormustbeROOFING CONTRACTOR "qualifiedinwaterproofingjobs""ITISTOOEASYtobecomea beforeaninsurancecompanywillroofingcontractor,"saidBove.He guarantee his work.indicatedthat toget"qualified"the Theadvantagesofthisguaranteecontractormustshowajobhehas system includesecurity foreveryonedone,presentingtheproductsused, concerned.thecustomer,theand proving that he is technically able contractor,thespecifierandtheto handle the work, filing his request architect.Unfortunately,italsohasfor "qualification" with a special board some disadvantages. Theawhich is comprised of a wide range of rules createexperiencedofficialssuchasthe barriertotheintroductionofnewMinistryofLodgings,Ministryof materialsandtheimprovementofEquipment,anumberofalready application techniques, as the tendencyqualifiedwaterproofingcontractors, iscontinue with proven methods and toexpert researchersfromgovernment products. In addition, the guarantee ofand industry, as well as large buyers of thejobsbytheinsurancecompanyroofing such as the Railway company. Prof.Varianprotects contractors who do poor workAhearingisheld,allfactors on the first installation, and then afteranalyzed,and adecision rendered. the failure,dothejobover andareWithout "officialqualification",the reimbursed by the insurance company.contractorcannotobtaininsurance, In theory, they are supposedly coveredwhich is mandatory on all jobs, except . only for materials, labor, overhead, butin the event where the manufacturer or no profit margin.contractor is attempting to introduce Bove indicated that French contrac new materialsoranew system,and torsareattemptingtoinstituteacts as his own insurer. changesintheinsurancepremiumBecoming a contractor issomewhat base, relating it to quality workman complicated in that to become qualified ship and failure ratio, rather thanonhe must have done a successful roofing the total labor costs.job, and yet he can\'t work until he is INTRODUCINGNEWMATERIALSqualified. Most contractors get into the THERE ARE SEVERAL WAYS inbusiness by (1)getting the assistance whichnewproducts,materials,andof manufacturers, who will insure the applicationmethodsmaybeintro job, (2)by doing the first job without ducedtotheFrenchcontractinginsurance,backingithimself,and K. Pearsonmarket,none of them easy.thereby obtaining references, or (3) by Forexample,manufacturerswithgetting an agreement with a qualified newmaterialsmay askforaspecialcontractor tohandleacompletejob, approval,settingupthenewunderhisinsuranceprotection,and specificationsandestablishingthethen branching out onhis own,after rulesofapplication,thanaskingforqualification. insurance companyprotection forone********** year only.Ifmaterial does not fail, the he may ask for an additional three yearThe next issue of ABC will continue the guarantee, and inthe event that theseries of articles onthe International roofing is still in good condition at theConferencewithadiscussiononthe end oftime, may be granted an ad BritishGuaranteeSystem.Future that ditional coverage for the balance of theissueswillcarrythefulltextof standard ten-year guarantee.ProfessorVarian\'spresentationon Anotherwaytointroducenewthe research work done in the French materialsorpracticesisfortheroofing industry. In addition,wewill manufacturer and/or contractor to bepublishdataonotherfacetsof Bove and Amaguethis own insurer. Bove gave an exampleEuropean roofing. 8'