For to-code-installation of the chimney going straight up through the dome roof, you will need a metal flashing that leaves 2" clearance around your insulated stove pipe.
This kit includes the metal flashing, storm collar, vinyl collar and specialized vinyl glue.
The kit can be installed anywhere on the dome that is not much steeper than 45 degrees. you do not need a pre-defined opening.
We recommend using 8" outer diameter insulated chimney as it is lighter and easier to deal with and doesn't require a support bracket. We can make the kit for 10" outer diameter chimneys if required - please specify before purchasing!