Expert: James Ball - 10/23/2008

Question
QUESTION: I have seen on several sites that I can not put single wall black pipe inside an existing masonry chimney as a liner. If I seal & steel rivet all the pieces together inside the existing chimney, it seems that it would be safe and easy for me to keep clean. (I will be cleaning it at least once a month) The run inside the chimney would be appox 24' and the chimney is built as part of an outside wall with the 3 interior walls of the chimney 2 bricks thick. The cost of a stainless liner system is prohibitive at this time given the current economic situation. I was hoping to do this install within the next day or two so any help or suggestions would be greatly appreciated.

ANSWER: Hello Mark, check with your local building department for the installation you want to do. You do not say if this is for a wood stove? If so it must me insulated also.
do not install the single wall pipe in this chimney.
do not take this kind of chance with your home and family.
James Ball

---------- FOLLOW-UP ----------

QUESTION: Yes, it is for a very good quality wood stove. The building this would go into is 153 yrs old, all brick, 28' x 80', 2 14'stories with a full 10' basement, and has 4 chimneys. At least 2 of the chimneys have been used previously for many decades with wood/coal stoves without any type of liner at all(all brick)without any ill effects. I guess my question is WHY is it a bad idea? What could happen if I were to do this install? Would it be too hot for the inside of the chimney? Would it be better for me to use the chimney as it is without any pipe in it at all? Would double wall pipe be that much safer? I've been a contractor/carpenter for appox 30 yrs and have installed several wood stoves in the past, so feel free to get technical with your answers if you need to. I will hold off on the install for now until
these questions are answered. Thanks again, I really appreciate the input.

Answer
Welcome back Mark, with out the installation manual for that stove I would check with the local building department. no sealer would stand up to the heat from a wood stove, all wood stove installs are with SS pipe...to be honest I am not sure why other than the SS liner can hold up the the 2000 degree + heat that a chimney fire can produce. lastly just be cause "At least 2 of the chimneys have been used previously for many decades with wood/coal stoves without any type of liner at all(all brick)without any ill effects" in my opinion was just lucky.
pease I know cash is tight all over right now but you would be taking a very big chance with your home and family's safety.
James Ball