Disaster averted!
- Thread starter webby3650
- Start date
-
Active since 1995, Hearth.com is THE place on the internet for free information and advice about wood stoves, pellet stoves and other energy saving equipment.
We strive to provide opinions, articles, discussions and history related to Hearth Products and in a more general sense, energy issues.
We promote the EFFICIENT, RESPONSIBLE, CLEAN and SAFE use of all fuels, whether renewable or fossil.
- Status
Yikes. I'm glad that you got to that one just in time and before something serious happened. What clued them in? Did they smell smoke?
Highbeam
Minister of Fire
Ohh, they smelled smoke alright!
They called us out over a year ago because it wouldn't draw and the original installer (HVAC) had gone out of business. The unit is a Napoleon NZ 6000, and we found that they had used 6" pipe on it. It had 6" dura-tech, old metalbestos elbows with no support on a 2' offset, and DV firestops. Not much else could have been wrong!
Hogwildz
Minister of Fire
Ya, evidently they were afraid to touch the caulking.
I see it all the time, caulking that wasn't tooled. What a waste!
Hogwildz
Minister of Fire
Yeap, Seen that alot.
A little spit on a finger and work it both ways, and what a difference.
A bead of caulk pumped on and left, is just that.
A little spit on a finger and work it both ways, and what a difference.
A bead of caulk pumped on and left, is just that.
greythorn3
Minister of Fire
now theres a question, i have a friend that his chimney has direct contact with that shreaded pink fibre type insulation. i always thought there was supposed to be a 2" airspace around the chimney and always use mine this way, but he said it dont burn so thats how his is without the air space..
now is it ok or not? im afraid to have anything touching it but metal
mellow
Resident Stove Connoisseur
Or you will end up with a melted mess, never have been able to get fiberglass (no backing) to catch fire. It gets pretty rock hard after melting and cooling several times.
Interesting article on cellulose: http://www.rtekinsulation.com/cellulose-fire-resistance.htm
Interesting article on cellulose: http://www.rtekinsulation.com/cellulose-fire-resistance.htm
Grisu
Minister of Fire
Grisu
Minister of Fire
I think quite a few installers use unbacked fiberglass as "block-off plate" around a liner. Certainly the ones who installed my insert wanted to do that. Never thought it would pose a problem other than being a suboptimal installation.
Most manufacturers want to see a 2" air space around the pipe. The only manufacturer that allows insulation on the pipe that I'm aware of is TLC from hart&cooley. They make an insulation wrap that can be used in the ceiling box or attic insulation shield.
Selkirk sells JUSI (universal shielding insulation) that is permitted for use with their attic insulation shield, cathedral support box and their wall thimble.
Grisu
Minister of Fire
Sounds more like a legal/listing requirement than that is actually dangerous to put mineral wool around the pipe. Just wondering if liners are always assumed to be safe to put in contact with mineral wool insulation as we often recommend to stuff Roxul in the damper area.
With all of these systems you should follow manufacturers install instructions and recommended materials because that is how they were tested and listed. If you use other materials or don't follow instructions and something happens it is very likely that the insurance company will not pay. There are many things that could be used that would be safe but i just don't think it is worth the risk just to save a few bucks or a little time.
greythorn3
Minister of Fire
I absolutely agree. But Bholler summed it up, if there was ever an issue you can guarantee there be lots of finger pointing. I don't want any fingers pointed at me!
I'll add that I do not think its acceptable to have any type of insulation except ceramic/mineral wool in contact with a wood burning appliance or its connector.
absolutely agree with this as well well thermix or one of the other pour in insulation are ok to
Last edited:
velvetfoot
Minister of Fire
That reminds me of a project at my place this spring. I hired a chimney guy to add an 8" flue in a chase that already had two flues. I didn't want to get in the way, but I went downstairs and asked his helper, "where's Tim?", since he wasn't around. He was in the chase! He put in the entire chimney without taking anything off the chase! He's a wirey guy. I was impressed.
- Status
Similar threads
