b'FiberglassShingles PARTI aAt the last meeting ofit wasupdate ASTM D3462 with new test procethe ASTM Task Group held last June,dures and the proposed specifications for the decision of the task group .I:members to include the or laminated asphalt shingles .the As I have stated in the past, ganic laminated asphalt shin cracking and splitting problems II.clude the fiberglassbe ignored. If gles in ASTM D225 and in are still with us and should not cclaminated asphalt shingles inspecifications,possiblyignored, the problems will continue and ASTM D3462 rather thanget worse. developing a separate spec I suggest that, if the following ification to include both or can be accomplished between manuganic and fiberglass or two newfactures and roofing contractors, and all other I:one for organic and one forofIt wasgroups involved, the problems with fiberglass fiberglass. also agreed to use the single layerthe shin shingles can be resolved: 0gle for the tear strength test and not on the1 . Agreement on all test procedures in the double or triple layers. This decision was influenced by the many ways laminated shingles areASTM specifications.the shinglesthe manufactured. These include the adhesion of a2. Agreement on acceptable minimum double layer of shingles, adhering individualphysical properties so shingle tabs on the top of a full base shingle, at will perform in the field for their intended Itaching a half shingle beneath the bottom half ofguaranteed period of time. aa top shingle with wide cutbacks. Also, many of3. Agreement on recommendations on -athe laminated shingles use the two half piecestype orto be applied ofOtherof approximately 1it will easeproper fiberglass andor resolved, a shingle (exposed and unexposed) that areorganic shingles adhered with an overlapgeographically. inch.variations are manufactured to ex=- pose various dimensional appearances.If these items are accomplished Since the tests run by MRCAthe resultsthe concerns of the homeowner and reported at its 1993 convention, failures con when using the shingles and also give more tinue to be reported involving tearing and crack credibility to the entire roofing industry. ing of many 3-tab strip 20 and 25-year guaranBY BOB LACOSSEteed fiberglass shingles and fiberglass MRCATECHNICAL DIRECTORlaminated shingles from all areas of the country. Toconclude, I was requested to present an update on asphalt fiberglass shingles. There have not been any reports by the Asphalt Roofing Manufacturers Association CARMA), MRCA orWSRCA since the conclusion of thetests and reports by MRCA in 1993, except the work presently being done by ASTM to revise and I \\ MRJanuary96'