Proper way to install chimney pipe in metal building roof
I have a metal building that I would like to install a wood burning fireplace in. The metal roof panels are from Mueller and they are the R profile. They can be seen: http://www.muellerinc.com/building/rpanel.php
I have the underside, which would be the ceiling covered with Mueller's U panels, which can be seen here: http://www.muellerinc.com/building/upanel.php
The wood burning stove I have requires a 8" ID stove pipe. My ceiling height at the point of exit through the roof is about 21 feet. I am very reluctant to penetrate the ceiling and roof panels, as I am afraid of not being able to seal it properly. Since I have metal panels on the ceiling, if
any water leaked through the roof panels, it would run right down the ceiling panels to the wall, and I wouldn't know I had a problem until I started seeing water damage.
So, my question is, should I penetrate the side wall and then turn the pipe up, or penetrate the ceiling/roof panels? I know people penetrate the roofs of metal buildings all the time, so what is the proper method and proper materials to use?
I plan to run single wall stove pipe to within 18" of the ceiling, and then transition to insulated stainless chimney pipe to penetrate the ceiling/roof. The stainless has on OD of around 11-12."
The has been worrying me to death so any sound advice would be greatly appreciated.