Stove pipe question for Glenwood 118

We're installing a Glenwood 118 this weekend and I have a few questions about the pipes. We're using uninsulated pipe right out of the stove for a few feet, there is a damper installed here. Then we're switching to insulated pipe for the rest of the way up, through the attic and above the roof. We're screwing the uninsulated sections together, but what do we do where it transitions from uninsulated to insulated? Also, insulated pipe is heavy and it seems to be a lot of weight resting on the 90 degree bent pipe that comes out of the back. Any suggestions?

There should be a ceiling support box mounted to your ceiling joists in the attic. This box supports the weight of the pipe from your interior ceiling, through the attic and out the roof. So the only weight resting on the stove elbow should be the length of pipe from the stove to your ceiling. As far as connecting uninsulated pipe to insulated pipe, I’ve never done that but they must make a connector for it. Fyi...there really is no need for insulated pipe on the interior of your house except for clearance purposes or draft issues. Single wall uninsulated pipe helps heat the house by shedding it’s heat into the room.