I appreciate all the knowledge on this forum, so decided to post my dilemma. Last spring I lost my chimney cap in a wind storm. Called a local chimney sweeper who did a cleaning and inspection. They came up with a laundry list of recommended repairs,saying I had cracked tiles, moisture problems,showed me pictures on his phone( who knows could have been someone else's chimney). the next night this same sweep company was on our local news about sweeper scams. I called in another company after checking references. Now the problem: VC Large winter warmer installed 5 hrs ago from the retailer we purchased it from has a 6inch stainless steel liner extending only half way up the chimney. When I asked the sweep owner for a price on a cap and a liner after his inspection, he said he would not feel comfortable installing a cap because a partial liner makes a flue unserviceable. He also has concerns with giving a quote on a full stainless liner because an 8 inch liner would be required for this particular insert and it simply won't fit inside the flue that we are currently using to vent the insert. In order for an 8 inch to fit, they would have to break out the inside of the chimney which would be labor intensive. Also the heating flue is in the same chimney as insert flue and breaking down the inside of the chimney would likely damage that and would also need to be replaced($$$). I am getting very worried about this because not only does my stove not run as efficiently as it could with a full stainless steel liner, nor was it installed correctly, but in order to be properly cleaned, the winter warmer needs to be removed from fireplace. I have yet to find anyone to do that so really I have been getting a sub par cleaning all these years. After five years this is the first chimney sweep company that has told me there is a problem and I am inclined to believe him. Any words of advice would be much appreciated!