I just got done knocking the rear lintel and bricks out of the top of my fireplace, now I'm getting ready to get my flex liner so I can install my wood stove. One thing to address though is that my current masonry chimney is only level with the peak of my house and while it extends more than 3 feet from where it meets the roof, it's not 2ft higher than the nearest point within 10feet, it's level with it. So from what I've read I need to extend my chimney somehow to get an 2-3 feet out of it. My sweep recommended adding an extra flue tile so the liner will stay insulated all the way to the top, I think this would not look very good. My thought was to simply add a piece of ridged stainless pipe on top of the top plate, but then you run into the uninsulated factor. What would you guys recommend?