I used Foreverflex 7" liner.I found a calculator to calculate the amount of insulation needed on one of the liner supplier's websites.I don't remember which one it was.The insulation is not cheap but it did give me a UL listed assembly
fraxinus said:For an unlined chimney of this age, a poured in place liner is by far the best solution. A stainless liner will not do anything to enhance the structural integrity of what is now a 200+ year old chimney. I fully understand the cost issues, but when you add up ss liner, insulation, labor etc., I found Supaflu (which comes with a lifetime transferrable warranty) to be price competitive. Spending the extra money (if it is extra) now, if it is at all possible, will give you a lifetime repair and great peace of mind.
fraxinus said:Five years ago, I paid $1500 for a Supaflu liner in an old unlined chimney of about 30 total feet. Your best course would be to find a local dealer at www.supaflu.com, contact him and see what the current price would be in your area.
oconnor said:The idea is to run a chimney inside your current chimney - the only reason you need a liner is to complete the old chimney you have now. If you ran a new chimney (even if you did it inside the old one), you wouldn't need a liner.
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