I inspected a 30 year old home yesterday that was in excellent condition. Very nicely appointed. Very little found that required repair or replacement. There were two fireplaces in the home that appear to be masonry but the firebox was lined with a material I'm not familiar with. I've attached photos here. If you're familiar with this process or application I would appreciate your feedback. Thanks, Don Norman Download Attachment: P1080619.JPG 227.04 KB Download Attachment: P1080616.JPG 241.77 KB