Glass mineral wool insulation?!

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Author Message David G. Axt, CCS, CSI ,SCIP Senior Member Username: david_axt Post Number: 1942 Registered: 03-2002 Posted on Friday, July 22, 2022 - 02:02 pm:    Knauf Insulation is calling their glass fiber insulation "glass mineral wool". Tecnically sand is a mineral but is sure confusing. I guess sand is also a rock so glass fiber insulation could be called rock wool insulation. ;-) David G. Axt, CCS, CSI, SCIP Specifications Consultant Axt Consulting LLC John Bunzick Senior Member Username: bunzick Post Number: 1883 Registered: 03-2002 Posted on Friday, July 22, 2022 - 02:11 pm:    ASTM C612 Mineral Fiber Block and Board Insulation includes rock, slag or glass fiber products. So "glass mineral fiber" might be slightly better than "glass mineral wool," but having the word glass there would seem to make it unambiguous. Ronald L. Geren, FCSI Lifetime Member, AIA, CCS, CCCA, CSC, SCIP Senior Member Username: specman Post Number: 1616 Registered: 03-2003 Posted on Friday, July 22, 2022 - 02:25 pm:    Then they are not conforming to ASTM C168 "Standard Terminology Relating to Thermal Insulation." Ron Geren, FCSI Lifetime Member, AIA, CCS, CCCA, CSC, SCIP ken hercenberg Senior Member Username: khercenberg Post Number: 1484 Registered: 12-2006 Posted on Thursday, August 04, 2022 - 05:25 pm:    I agree Ron. While it seems that ASTM C168 would be okay with them calling it mineral fiber, not mineral wool, better terminology would be glass fiber, fiber glass, or fibrous glass. I like their products. No idea why they would go down this path.