Clearances on ceiling support box

[Scrounger]

I had 'one of the best' guys install my stove and liner way back when. He was highly recommended from the stove shop. I would never let him back in my house to do any work, not even to change a light bulb. I first noticed the crooked chimney cap and went up to straighten it, noticed big gaps around the clay flue and flashing piece he bent/made to cover the clay liner up top. Wasn't sealed. Learned about a block off plate from this site. He talked me out of it, bunch of excuses, he didn't even use screws to attach the liner to the insert, just shoved in the stove. He was supposed to be one of the best according to teh stove shop. I could go on and on, long story short, I tore everything out and re-did it myself.

 

[Felix5513]

Well, it's harder when he is your friend and you trust him.

 

[Highbeam]

The ceiling support box is what supports the full weight of the chimney on your and both of my installs. Often, the weight of the connector pipe below to the stove is also suspended from it. It's a strong box and can support a lot of pipe IF installed per the specs. Each side of the box gets two screws into actual framing. The framing needs to be structural and solidly attached and not toenailed in junk. I chose to use simpson hangers.

Oh and I can already tell you're going to have cloggage problems with that cap screen. It is very easy and reversible to remove that screen. Otherwise plan on going up on the roof to clean it perhaps every few weeks. Some folks never need to clean it, some folks very often regardless of burning habits or fuel quality.

 

[Felix5513]

So should I add a couple screws and add a 2x4 on one side?

 

[Felix5513]

On this website it says clearance to combustibles is 2 inches.
http://www.woodlanddirect.com/6-inc...qwMN39oWGgJh4o96_LrdPHN-qA66y1MILwaAmGU8P8HAQ

 

[webby3650]

The install looks fine. With a short flue like that I wouldn't worry about adding any more fasteners. Just make sure there is a 2" clearance to the wood in the attic, it's hard to tell from the pics.

 

[Felix5513]

The wood the box is screwed to is not 2 inches.

 

[webby3650]

The wood the box is screwed to is not 2 inches.

Yes, that's fine. You need 2" clearance to the pipe.

 

[Felix5513]

Ok.just making sure. Thanks for all your help.

 

[Felix5513]

I have 2 inches for sure from the pipe. I stuffed insulation all around the box though. It barely gets warm even after a long, hot burn.

 

[kennyp2339]

I have 2 inches for sure from the pipe. I stuffed insulation all around the box though. It barely gets warm even after a long, hot burn.

You mean outside around the box right, the inside of the box should be empty except for the chimney pipe, a attic insulation shield should be clamped around the pipe covering the top of the box keeping insulation out of it.

 

[Felix5513]

Yes. Outside the box. I will get one of those shields. But I don't think insulation can get in it.

 

[webby3650]

I wouldn't worry with the shield since you have batted insulation. The box sticks up high enough to protect the pipe. Beside you'd have pull the chimney out to install the attic insulation shield.

 

[Highbeam]

Yes, that's fine. You need 2" clearance to the pipe.

That's why they built the box the size they did. A ceiling box for an 8" pipe would be bigger. That's one of the reasons that upsizing from a 6 to an 8 inch pipe is such a pain.

That ceiling box is also your insulation shield. It's a cool idea to get both the support and the insulation shield in one.