Good evening gentlemen,
I am having issues identifying this substance on the ducting from an early 1930's era home. The white tape I know is asbestos and is included in my report but the brown granulated substance I am not familiar with. It had almost a cork type texture and was on most of the main trunk ducts except where the ducting had been replaced over the years. I have inspected a few homes in this subdivision and this is the first time I remember seeing it and Google is not helping. Any of you gents have some information you could impart unto me?
Thank you in advance