b'WHAT\'SRIGHTWITHREROOFING? W HAT\'S RIGHT with re-roofing?Theproblemwithajobofthistitled, "How We Prosper Under FreeFor one thing,the profitsaretypeisnotonlythattheweightofdom"tellsusthattoolsareabasic excellent.For another, competition istheaddedmaterialmightcausethepartofthelawsgoverningthe smaller because many contractors shycollapseoftheroof,butthepro achievement of "affluence."He says, awayfromjobsthatmightrequirehibitive costs of removing and dispos "Theformulaforliftingmankind anytear-offs.Yet,thisiswheretheing of alargevolumeofwastema fromsavagery - thousandsofyears money can be made.terials,iftheoriginalestimatehadago - toourpresent-day,so-called Unfortunately,thisisalsowherenot provided for this.\'affluentsociety,\'maybeexpressed themoney canbe lost,if unforeseenFortunatelyintheabove instance,intheequationMMW=+HENR conditionscropup.Forexample,athecontractorhadwiselyprotectedx T. What does this formula mean and new roof applied over an old corrod himselfbymakingatestcut tode howwasitdiscovered? edmetaldeckmightcollapsewithterminewhatlayunderthesurfaceInthis equation MMW (man\'s madisastrous results. On the other hand,conditions.terialwelfare:hisneedsandwants) the deck might be sound, but on old Estimating ismade easierifatestisdependentuponNR(naturalreerbuildings,thereisalwaysthecutismeasuredtoasize12inchessources: wood, minerals, the earth and chancethatmultiplepliesfromfor square.Thesample,weighedandwater)plusHE(humanenergy-merre-roofingapplications,togethermultipliedbythenumberofsquaremuscularandmental)multipliedby withanewapplication,mightresultfeetintheroof,willgivetheover T(tools).This is abasic natural law inanunreasonable loadon theroofall weight of the material already ap which mandiscoveredovertheages structure.plied.Examination of the sample will- it is called The Law of Production. Forexample,severalyearsago,aalsorevealtheadhesivestrengthofEverythingthatmanproducesinroofingcontractorexaminingaroofthe bitumenin cementing the insula volvesthesebasicelements- no in preparationtomaking acost esti tion to the deck, and the adhesion ofmore, no less.Obviously the quantity mate,tookatestcut whichindicat the felts in the BURsystem.and qualityof production,therefore, ed that the roof had three re-roofingOnecontractorindicatedthathisdepends onthequantityandquality applicationsinpreviousyears.Themencarryregularcuttingkitsinaofnaturalresources,humanenergy, weightfactorsfor100squaresofmetal box fitted with shoulder straps,and tools." the roof were as follows:and containing a knife, alittle plasticThissamelawappliestore-roof1931 - Original 4ply tar and gravelcement, felt and membranes and evening applications as well as other types roof applied.some mechanic\'s soap for washing upof production.Selecting the best tools Weight of gravelatafterwards.tosupplementNRandHE becomes 400 lbs. to square6,000lbs.Onlyatestcut willtellyouwhatanother matter.Later inthisarticle, roof applied.problemsyouwillencounterunder wewillcarryabriefdescriptionof Weight of felts atneaththetopsurface.Youdon\'tsometoolsthatareavailable.If 60 lbs. to square6,000lbs.dare guess.readers would like added information, Weight of hotstuffIt isadvisable to make several test the couponat the endof thisarticle at 80 lbs.tocuts, particularlyin thetroubleareasmay be used to indicatethisinterest, square8,000 lbs.todeterminewhether(1)toaddaandthemanufacturerswillsendout 1941-Roofscrapedandnew roof over the old,(2) to removeliterature. 2pliesoffeltappliedall the old materials down to the deck, Weight of felts ator(3)toremoveonlyaportionofTheImportanceof Supervision 30 lbs. to square3,000 lbs.the roofing, using a roof scraper withPROPERJOBSUPERVISIONis Weightofhotstuffa blade adjusted to the desired depth.the link between the acceptance of a at 40 lbs.toOnce all the factors are determinedcontractandthecompletionofthe square4,000lbs.(1)throughtheregularstepsofjobthat determines the smooth oper1944 - Roofscrapedandnewcheckinge x t e r i o rconditionsandationtoinsureaprofittothecon4ply roof appliedmeasuringtheareaand(2)throughtractor.Planningforthejob,and Weightof feltsat 60examinationofthetestcut samples,adequate conferenceswiththeRooflbs. per square6,000 lbs.the contractor is ready to make ade ingSuperintendent and Foreman, will Weightof hotstuffcision on the method of reroofing andat the least,insureameasureof coat 80 lbs. totheequipment,timeandmenthatoperationinhowtheworkisdone. square8,000lbs.will be needed.Accurate cost figures,Goovereverystep,letthemknow 75,000lbs.derived from previous jobs and expe whenthejobshouldbecompleted, rienceareaninvaluableaidtothehavethemcheckoutsupplies,etc., The contractor sliced and removedkind of estimating that makes moneysothey are not caught short.Try to fromthe roof,37Tonsofdebris.for thecontractor.cover asmanypointsas possiblebeItisdoubtfuliftheroofstructureforethestarting date. could possibly have withstood an add Keeping costsdown edburden of another7tons of ma IT ISWELL tokeepin mind theUnited States Gypsum Company has terial.Themultiplelayerswouldimportance of tools and equipment inprovided "A BlueprintforProfit,"a haveamountedtotenlayersof feltcontrolling the cost factor in roofing.brochurecontainingachecklistfor andtenlayersofhotstuff.WarrenT.Racket,inhisbooken- (Continued onpageI 0) SEPTEMBER,19719'