John Dirks Jr 6 Report post Posted February 19, 2017 I've never seen this stuff before. It was in an early 70's duplex in central MD. It appears to be a fiberglass mat of sorts. Each strip was about 3/4" thick and 8" wide. Does this stuff have a name? What is it? Click to Enlarge 49.89 KB Quote Share this post Link to post Share on other sites
John Dirks Jr 6 Report post Posted February 20, 2017 Could this be the stuff chimney guys use to seal gaps in fireplaces and flues? Quote Share this post Link to post Share on other sites
Bill Kibbel 68 Report post Posted February 20, 2017 It looks like ceramic fiber insulation - for industrial furnaces, boiler linings, kilns. Maybe Kaowoo or Unitherm. Quote Share this post Link to post Share on other sites
John Dirks Jr 6 Report post Posted February 20, 2017 Thanks Bill. I googled those names you listed and the pictures I see look very similar. The stuff was laid out in there overlapped and two layers thick. It was laid on top of a 3" fiberglass batt. Quote Share this post Link to post Share on other sites
