Chimney through roof overhang?

[jdc]

I'm putting my chimney out and up the wall. It will pass through the roof's gable overhang. Unfortunately the chimney requires 6" inner + 4" insulation + 4" clearance = 14" total diameter/width - but the overhang is only 12" deep. Thus, I will be needing to cut out a "notch" in the overhang.

Has anyone done this? Photos? Tips, pointers, or other advice?

 

[Heatsource]

yes, go with smaller pipe. 6" solid pack is 8" od, so a 12" space
some brands have close clearance ceiling supports, not sure if one could be used outdoors though...

 

[jeff_t]

What kind of pipe is this?

 

[EatenByLimestone]

I did it with a masonry chimney. I now rent the house out so no pics unfortunately. I made sure I flashed and caulked it really well.

 

[Leslielou]

We have a 15 degree offset instead of notching the soffit, due to the size issue. Not sure if this is an option to consider.

 

[begreen]

This install has pictures that should help:

https://www.hearth.com/talk/threads/install-pics-from-scratch.93102/#post-1223455

 

[DexterDay]

Is it 2" clearance to combustibles? And you just added 2" more for diameter? (10" pipe with 2" per side?).

........Unfortunately the chimney requires 6" inner + 4" insulation + 4" clearance = 14" total diameter/width

I added one more foot of Horizontal and went past the eave. It doesn't look as clean as going through the eave. But I didnt want to cut mine.

 

[jdc]

The pipe is Selkirk Supervent 2100. Total pipe diameter is 10" and 2" clearance to combustibles is required. I did phone the building inspection department to ask if there were any options available for shielding or insulation to reduce the clearance and he said no.

The installation instructions say no offsets permitted.

I haven't seen anything available here (Yukon) with less than 2" of insulation and to be honest, with a catalytic stove and exterior chimney that is not straight up from the stove (out the wall) I want as much insulation as I can get.

Thanks for the photos. The longer horizontal pipe is a good idea for avoiding "the cut" - but because our driveway and a couple windows are on that side, I would rather have an ugly cut.Interesting to see the install where they cut into the fascia. In my case I have to completely cut through.

I'm thinking of just cutting a square-ish notch into the overhang. Because it is near the peak of the roof on the gable end (a few inches away actually) there isn't much "uphill roof" to feed water into the gap. I am going to leave the notch open and trim up the inner edges of it with wood the same as the fascia - no big flashing piece covering the gap.

I am guessing I just leave the "uphill" and "side" shingles hanging over the edge (is there a drip edge type thing I should install here?) and maybe bend a piece of flashing over the "downhill" side of the gap to keep water from getting under the shingles?

 

[begreen]

Cut off square works especially if there are no gutters involved.