b'intothecausesoffailuresofbuilt-uptions, test panels 8foot square were conroofs.structed and covered with built-up roofing The Advisory Committee composedofover insulation, with half of the test panel JohnHartmann,CharlesN.Griffiths,J.gravelled and the balance minus the gravel W.Kerr,JohnReucer,ClydeScoccandfo.rbetter observation. FredGood,recognizingthemultiplicityWeather conditions, inside and outside of problems, decided to limit the researchtheaveragebuildingweresimulatedbeintooneparticulartypeoffailure low and above the test panels. The concluwrinkling.sionscome tobytheresearchersonthe ProfessorBrothertondescribedanrn resultsofthetestsandthefindingsof terestingcasehistoryofaroofinspec otherresearchersisthatmoistureand tioninwhichtheresearchersbetween9moisturevaporbeneaththeroofmemA.M.andNoon,observedthebirchofbrane playsan important part in causing blistersin almosteveryarea of theroof.failures in the roofing system. TheroofconcernedwasfloodedeachRecommendations in the report arefor summer withnoreportof leaks,butinfurther studyusingtestpanelsrepresenthewinterwhensteamjetswereturnedtative of the wide varietyof roofing maon to maintain high humidity, "leak" com terials and roof decks, for study notonly plaints began.of moisture migration but of movementA questionnaire sent to members of theexpansion and contraction. NationalRoofing Contractors AssociationThereportisinterestingandthedegot responsesfrom76 who reported thatscriptionoftheeffortsmadebytheremostofthefailuresinconnectionwithsearchers to produce blisters and wrinkles Roofing accountant Jack Walshwrinklingorblisteringoccurredinthein test panels was especially valuable, but northern states where the roofing was ap theresearchhasrevealednothingnew, plied in the fall and winter.merely adding moreevidence tothecolceptiononSundayeveningtenderedbyFollowinganumberof fieldobserva- lective thinking on the subject. theChicagoRoofingContractorsAssociation. On Tuesday evening the N.R.C.A. will againfeaturetheOfficersreceptionand cocktail party.CONVENTIONCALENDAR AhospitalitysuiteawaitstheladyJan.12-13,1962.MidwestRoofingConMarch 3-5, 1962. NERSICA National Home guests, with coffee and rolls on hand everytractorsAssociation,RegionalManage Improvement Show,N.Y.Coliseum,Nermorning. The ladies will also be interestedmentConference,NebraskaCenterforsico, Inc.,12E.41st Street, New York17, Confinu;ng Education, University of Nebras New York. intheopportunitytowinadiamondko, 33rd &Ho/dredge,Lincoln,Nebr.Robladieswristwatch,plus"stacksofdia ert P.L ns, Sec\'y,Power and Light Bldg.,March,1962,PennsylvaniaSheetMetal, yomonds" for all inattendance.Kansos City, Mo.AirConditioningandRoofingContractors Also for the ladies is a luncheon at theAss\'n,BrodheadHotel,BeaverFalls,Pa. Jan.24-25,1962.CarolinasRoofingandWalterRudolph,Sec\'y,R.D.1,Fairview, EarlyAmericanRoomatMcCormickSheetMetalContractorsAss\'n,Roofing Pa. Place( which incidentally hasoneof theSheetMetalandAirCon:litioningForum, largest roof expanses in America) . ThereState College, Raleigh, N. C. M. F.Hamlin,April12-14, 1962.Roofing & Sheet Metal will be breakfast at the "Top of the Rock"Sec\'y,Box6116,FivePointsStalion,Contractors\'Ass\'n.ofFlorida,Robert in the sky-high Prudential building.Raleigh,N.C.MeyerHotel,Jacksonville,Fla.,FronkD. Jan. 29-30, 1962. Annual Residential Con Wesley,Sec\'y.,P.0. Box1044,I.alee/and, structionCourse,UniversityofIllinois,Ur Fla. bana, Ill. (includes two year research reportApril 12-14, 1962. Sheet Metal,Air Condi, N.R.C.A. ResearchOnonbuilt-uproofingfailures),RudardA.tioningandRoofingContractors Ass\'nof Jones, Director, Urbana,Ill.Illinois, Springfield, Ill. MartinE.Lauerman, Built-Up Roofing FailuresSec\'y, 237 E. Tompkins St., Galesburg, Ill. Jan.31-Feb.2,1962.HomeImprovement PublishedProducts Ass\'n.,CoboHoll,Detroit,Mich., DavidWinnick,Sec\'y.,280MadisonAve.,May 12-18, 1962. Sheet Metal & Air CondiI NHIS introduction to the 26 page re New York,N. Y.NewYorkStateSheettioning Contractors National Ass\'n, Aboard porton"AnInvestigationIntotheS. S. Queen of Bermuda en route to Bermuda Feb.4-7,1962,from New York City. Joe Wilder, Sec\'y, 107 Causes of Built-up Roofing Failures," Uni Metal, Roofing & Air Conditioning Contrac Center St., Elgin, Ill. versityofIllinoisProfessorDonaldE.tor\'s Ass\'n, Manger Hotel, Rochester,N. Y., BrothertonnotesthatwhilemillionsofClarence J. Meyer, Sec\'y, 569 Genessee Sf.,June14-16,1962.CarolinasRoofing& squares of built-up roofing have protectedBuffalo, N. Y.SheetMetalContractors\'Assn,Francis MarionHotel,Charleston,S.C.Bradford roofssuccessfullyfortwentyyearsorFeb.9-10,1962.SheetMetal&RoofingJohnson,Sec\'y,P.0.Box1966,Raleigh, more,someroofshavefailedinonetoContractors Ass\'n of Minnesota, Red CedarN. C. Jnn,AusHn., Minn.,Howard Comitsch,Sec\'y, fiveyears.However,thesefailuresrepre 867 Grand Ave., St. Paul 5, Minn. sent only asmallpercentage of the totalJune14-17,1962.SMEROHACCA(Sheet Feb.12-14,1962.NationalRoofingConMetal, Roofing,Heating, and Air Conditionnumber of roofs installed.tractorsA;s\'n.,PiclcCongre$$Hotel,Chi ing Contractors Ass\'n of Georgia), Riverside Mostofthefailuresheattributestocago, Ill., Fred Good, Sec\'y., 189 W. Modi Hotel,Gatlinburg,Tenn.,B.L.Noblitt, mechanicaldamage ortopoor initialin son St., Chicago2, Ill.Sec\'y,20BRedRockBuilding,Atlanta3, stallation, either in the choice of materialsGo. Feb. 22-24, 1962. CanadianRoofing Conorworkmanship.Thestudybeganintractors Ass\'n.,PaliserHotel, Calgary,Al July 3-5, 1962. International Roofing ConSeptemberof1959followinganagree berta,JacquesChevalier,3405CoteDestractors Federation, Bade Godesberg (near ment between the National Roofing Con Neiges,Montreal, Quebec, Canada. (Note,Bonn and Cologne) Germany. J. C. Gudas, tractors Association and the Small HomesCRCAhas alsoset Jon. 28-30,as convenActing Sec\'y, U. S. and Canadian participaliondotesfor1963\'sconventionatthetion, 508 Great 1.okes Building, Chicago6, Council- Building Research Council of theQueen ElizabethHotel, Montreal,Quebec.)ti/. Universityfor acooperative investigation JANUARY,196219'