Mark P Posted June 30, 2016 Report Share Posted June 30, 2016 It is not dirty, this is its color. Click to Enlarge 48.09 KB Quote Link to comment Share on other sites More sharing options...
Mark P Posted June 30, 2016 Author Report Share Posted June 30, 2016 I think it is rock wool. I just needed a 2nd cup of coffee to jog my memory. Quote Link to comment Share on other sites More sharing options...
Les Posted June 30, 2016 Report Share Posted June 30, 2016 It is rock wool. We also call if mineral wool. I learned years ago that there are no exact terms for insulation. Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted July 1, 2016 Report Share Posted July 1, 2016 Isn't mineral wool the generic term and Rockwool a brand name? Quote Link to comment Share on other sites More sharing options...
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