So it looks like I have the option to have the 5 inch swapped with a 5.5 inch but the installer says they are not sure it will work as my chimney ID is 6 1/4 and there are little sections of mortar sticking out of the tiles in places. OD of 5.5 liner is about 5.75 and this would be uninsulated. The 5 slid through no problem with room to spare. Also - are the clean out tees for a 5.5 actually this size or do 5.5 kits come with a 6 sized tee and an adapter? If the little mortar pieces that stick out are the problem can I use a long piece of rebar and just chip these off carefully?
The other option would be to have the clay tiles removed and use an insulated 6 inch liner. Perhaps a silly question but can you break up the tiles and just let them fall to the bottom? My chimney as seen above is huge and the lower portion is in the crawlspace and is all concrete block for support. I think the chimney goes much lower than my hearth and wondering if I did bust the tiles could I just let them fall? Obviously this isn't ideal but could be inexpensive and an easy fix?
The other option would be to have the clay tiles removed and use an insulated 6 inch liner. Perhaps a silly question but can you break up the tiles and just let them fall to the bottom? My chimney as seen above is huge and the lower portion is in the crawlspace and is all concrete block for support. I think the chimney goes much lower than my hearth and wondering if I did bust the tiles could I just let them fall? Obviously this isn't ideal but could be inexpensive and an easy fix?