Ceiling support box for alcove

[NotAProfessional]

Hey,

I recently posted in another thread about possible clearance issues with the wood stove in my alcove. Now that I dig more into the topic on how to do it right, I also learned that I'm supposed to have a ceiling support box (I think). They just put a decorative collar and called it a day. "They" is the previous owner of the house (or a contractor they worked with).

The wood stove sits in an alcove and the chimney goes straight up. It doesn't go through an attic space or any other occupied rooms, but it's enclosed almost all the way up (see picture).
The whole enclosure will be rebuilt as part of this project.

As far as I understood, reading manuals and posts in this forum, I need a flat ceiling support box for my living room (first picture).
In addition to the support box, I was going to add an attic insulation shield. Everything past the drywall is a Class-A chimney pipe (Model SC / SPR / FC) from Selkirk.

The pipe from my stove up the decorative collar is DSP.

Am I right in my research or am I missing something?
I can't quite determine if I need an attic insulation shield, rafter radiation shield or fire stop. Any help would be much appreciated.

 

[Whitenuckler]

I don't know for sure. I would think the parts you need would be based on your stove manual and the stove pipe product specs.
I don't think the stove should be load bearing, the pipe should be supported.

 

[NotAProfessional]

That's what I was hoping, but it really only says this:

But I don't know exactly what that means. I'm not in a mobile home, does that mean I don't need a support box? Just a an insulation shield where the pipe leaves the living room?

 

[Whitenuckler]

That's what I was hoping, but it really only says this:

View attachment 339819

But I don't know exactly what that means. I'm not in a mobile home, does that mean I don't need a support box? Just a an insulation shield where the pipe leaves the living room?

I would think you need the Selkirk Pipe manual. I had a WETT certified guy do my install as I needed it for insurance.
If you are doing everything yourself that could take some time to figure it out with some help from here.

 

[NotAProfessional]

I would think you need the Selkirk Pipe manual. I had a WETT certified guy do my install as I needed it for insurance.
If you are doing everything yourself that could take some time to figure it out with some help from here.

I did initially, which is why I chose the two parts I showed in my first screenshot. But I'm not quite sure if mine is considered a one story or two story as per definition. Since it doesn't go through any living space, I would assume it's one story:

Unless it's about the height and weight of the chimney, then I guess it would be a two story and I need a Decorator Ceiling Support.
But then I don't know where the attic insulation shield would go because it doesn't go through living space. Nothing really applies to my situation.

 

[Whitenuckler]

I did initially, which is why I chose the two parts I showed in my first screenshot. But I'm not quite sure if mine is considered a one story or two story as per definition. Since it doesn't go through any living space, I would assume it's one story:

View attachment 339821
View attachment 339822

View attachment 339823

Unless it's about the height and weight of the chimney, then I guess it would be a two story and I need a Decorator Ceiling Support.
But then I don't know where the attic insulation shield would go because it doesn't go through living space. Nothing really applies to my situation.

You are not going through living spaces or a roof you are in a chase. There must be some examples of chase applications.

 

[NotAProfessional]

There is...kind of. But they are all horizontal hru wall installs with an elbow. And I haven't found anything about installing a wall thimble vertically.
That's why I think my situation is somewhat special.

 

[Murray01]

What above the drywall? Two elbows to get the chimney on the exterior of the house inside the chase?

 

[NotAProfessional]

Okay, I think I figured it out and I have good news for myself lol
The black collar, which I thought was a decorative collar is the actual support box. It's part of the SuperVent 5 piece support kit and looks exactly like the one I have installed.
The just didn't install it properly. I also can't find a draft stop anywhere and the chase is not insulated either which explains why cold air is pouring into my living room.

I think I know what I have to do now. Thanks for the help!

 

[Whitenuckler]

Okay, I think I figured it out and I have good news for myself lol
The black collar, which I thought was a decorative collar is the actual support box. It's part of the SuperVent 5 piece support kit and looks exactly like the one I have installed.
The just didn't install it properly. I also can't find a draft stop anywhere and the chase is not insulated either which explains why cold air is pouring into my living room.

I think I know what I have to do now. Thanks for the help!

That's great. I was actually wondering about that part. It looked very similar to the picture you had of the ceiling support box. I have never designed and installed a vent system myself, and but I am learning as I go. Before I got my pellet stove I found out from my guy that he was going to use the excelpellet product. I went through the whole design process right from the stove adapter right to the end nozzle. I made a sketch, had all the part number and their retail prices. It really helped me understand the install. Good luck, and if you open up the chase please repost with some pics.

 

[NotAProfessional]

and if you open up the chase please repost with some pics.

I don't know if you really wanna see that haha
I expect the worst. I know there is mold, rodents and probably all sorts of other things. I'm not looking forward to it, but it has to be done.

Fire was always something I said I won't touch because there is too much risk involved.
But I've been trying to find a contractor for many many months now. The ones that do eventually call back and even come look at it, ghost me right after or give me outrages quotes. So I'm kinda forced to dig into it myself, which isn't necessarily a bad thing.
I just tend to overcomplicate things when I do my research and go down way too many rabbit holes.

But I agree with what you said, it makes you understand how it works and at the end of the day, a lot of things aren't as complicated as they seem to be.