I'm planning on installing second wood stove in a basement . Going to be a part time/cold spell burner. Liner is heavy duty .016 Superflex. 23 feet going trough interior chimney. I was going to insulate it with 1/2 blanket (around $250 online) but found deal on craiglist for $40 for Olimpia made 1/4 blanket. Wondering if using 1/4 vs 1/2 will affect chimney liner performance much . Any thoughts ?
1/4 vs 1/2 chimney liner insulation.
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1/4" won't give you zero clearance to combustibles. Some liners have been tested with it and those will give you a reduction to 1/2 of what is required
Ctwoodtick
Minister of Fire
There is no combustibles, I goes trough clay liner to wood stove installed in open fireplace. My concern is draft and creosote buildup rate.
So a chimney running up through the house doesn't have combustible material anywhere near it? An internal chimney needs 2" of clearance between the outside of that masonry structure and any combustibles.
So, This is brick and mortar masonry fireplace with chimney going to the roof. There is 13" clay liner inside of it. Should i be concerned?
Just to be clear. Do I have to have 2" clearance from SS liner wall or original masonry chimney
Is this an internal chimney or external? I thought you had said internal but now I don't see it
If it in internal you need 2" from the exterior of the masonry structure. For an exterior chimney it is 1".
Ok so in that case you need 2" of clearance around that masonry structure. Do you have that?
An example of maintains clearance between the masonry and framing would be a 2" space between the outside of the chimney structure and the framing.
Most likely it's not the case.
Wondering, If standards so strict, why I see posts from guru like Begreen saying this:
". For an exterior chimney, I would always insulate, but not always for an interior flue. If the wood burned is dry and creosote accumulation is not an issue to start with, there may be little to be gained, especially if the liner is in a flue that is already tile lined and in good condition. If the flue is tall, insulating the liner may actually help to create too much draft. For example, if the chimney was 28 ft and the max recommended for the stove was 30 ft, I'd probably not insulate it.
Not arguing, just trying to get more knowledge.
Wondering, If standards so strict, why I see posts from guru like Begreen saying this:
". For an exterior chimney, I would always insulate, but not always for an interior flue. If the wood burned is dry and creosote accumulation is not an issue to start with, there may be little to be gained, especially if the liner is in a flue that is already tile lined and in good condition. If the flue is tall, insulating the liner may actually help to create too much draft. For example, if the chimney was 28 ft and the max recommended for the stove was 30 ft, I'd probably not insulate it.
Not arguing, just trying to get more knowledge.
CHAPTER 10 CHIMNEYS AND FIREPLACES - 2015 INTERNATIONAL RESIDENTIAL CODE (IRC)
ICC Digital Codes is the largest provider of model codes, custom codes and standards used worldwide to construct safe, sustainable, affordable and resilient structures.
codes.iccsafe.org
Read R 1003.18
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