b'Granule Adhesion on SBS Modified BituJDen Roofing By ReneDupuis M. The durability of SBS modifiedservicecut short, however, ifproperly em . T grbedded heanule bitumenmembr dependsgranule lo occurs. SBS must beweight loss should2or roofanesssbegrams reconmanyitemsincludingtheprotected from di\\ UV radia less to meet the current ASTM asphalt,of SBS polymertion;us,n coverage andstandards on SBS.T ASTM amountth gra ulehe loading, fillerand gra leadhesion arel and needtostandard for SBS polyester/glass contentnu vitacover. Admix is stable,stay on the sh for its servicereinforced membranes is goo SBSeetASTM usua 62 for canwithstand heatagingandlife. Quality SBS sheetslly061 ;SBS glass reinforced offers good low temperature flexhavegoodgranule adhesion.only ASTM D6163 and for SBS ehav manufacturedsheetsly b ior(0Forbelow}alterNewlySBSpolyester reinforced on ASTM yearsservice.are tested for granule adhesion06164. T standardswere ofhese We areoftenconcerned witha ingASTM 051 .approved inand first pubccord to47 1997 the retained physical properties ofThe granule scrub test proce lish ine 1998 ASTM Stedth anSBS roof membranes, since gooddure referred to by ASTMdards. 05147 977. retentionof physical propertiesis foundinASTM04 TheTheMRCATechnicaland leads to-term performance.device uses arizontal brush ofRes (T&R} Committee has long ho earch The industry now hasmil specifiedsizecontain tem long been aware of the impormanying lions offeet ofin pered steel w eistles that com tanceof granule adhesion and squareSBSser ir brviceonroofsthroughoutthepletes 50 cycles of back and forthstartedevaluatinggran e ulUnited States.has proven tom t over thegran embed nt of SBSu in SBSovemen ulatedme prod cts good995 Ano uence be aperformer and the pop surfaceofthe SBSmembrane1 .ther test seq was ular choice ofroof design sample.T brushstrokeis 6run inand 1 T T&R manyhe1996998.he ers.inches;thetestwillcertainlyCommittee will run another gran-The best SBS sh t wil Iitsremovegranulesthat arenotC dnext ee haveontinue onpage 1999 FoundationBenefac rs andPatrons toThe MRCA wishes to thank the following MRCA FoundationJames F. Karczewski, F J A C istiansen Roofing Corp.,l Benefactors,hr Caroge $5,000998who pled dto the foundation in 1 :Stream, Ill. David Grass, Firestone Building Products,Ind.James C.Mansfield, Ja Mansfield &C , L Ill. Company Carmel,mesSonsompany yons, Mike Peterson, Peters Aluminum Corp., Elk Grove Villa Ill.Jay Refieuna, Mansfieldfing and Sheet Metal, Inc., Lyons, Ill. enge,RooJim Gentry, Kirberg R fing In Louis oo c., St The M Aextends its thanks to the following F Patron John D. Drew, Mid-West R Company, MasonIowa RC alsooundations,oofingCity, pledgedthen enso Roofing who$1,000 per year for the next five years toMRCA Fou John D. Stephenson, Steph nCompany, dation1 Maryland Heights,. in998.MoClifford Johnson, E R ing & Insulation Co. Inc.,lsa, Okla.Kurt Baumgartner, MartinCompany, In Wichita,n. mpireoof Tu Roofingc.,KaDavid J. Tilsen, Tilsen R fing Company, Inc., Madison,L.B. Morris, Sellers & Marquising Company,City, oo Wis.Roof KansasMo. Dennis R. Runyan, Dryspace Inc., Cedar Rapids, IowaMichael J. Dalsin, M Jinn Inc., Sioux Falls, S.D. Dals Compa y, Douglas Richardson,Commercial R Inc.,llasMichael Pettigrew, Pe igrew &Inc.,tInd. SunoofsDa tt Sons,For Wayne, Ed Williams, Fremont Roofing Company, Inc.,,Ted Evans, T Milbrand Roofing,n, M h. Fremont OhioheCompany Warre icHarlan L.Hanson, Central StatesAmes,Raymond L. Haselton, Un Roofing Company, Inc., Chenoa, Ill. Roofing Company,Iowaion James A. Barr, Barr Roofing Company,lene,Robert F. Huntington, AAA Roofing Company, In Indianapo Ind. Abi Texasc.,lis, James Eckstein, Jr., CA E tein Inc , CincinnatiJames Brosseau, Ben &ng Inc.,Ill. cks nettBrosseau Roofi Romeoville, Anthony M. Spigarelli, Centr Roofing C Minneapolis alompany, 6'