Ok insulated chimney yesterday roughly 26 ft long 12x12 clay crock 6 inch stainless liner for indoor wood furnace that I have been heating whole house with (2700 sq. ft. ) for 3 full winters . and a 3 inch s.s. for hot water tank. Took 5 bags of vermiculite at 7.99 a bag . My chimney only gets build up in the top 3 feet the rest is SPOT LESS !!! , Just wanted to show what I did and get your thoughts . It was much eaiser than i was planning for.
Ray
Ray