New Chimney

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I'm having a new cottage shell built and plan to finish the rest myself. Since the roof is going to be new I want to get the roofers to install the chimney flashing now. I looked at a couple stoves and they seem to have either 6" or 8" discharges. The cottage is in Michigan and is 920 sq ft so I'm thinking I want to use a larger stove that will need the 8" pipe right? What about the flashing, can I just go down to a stove supplier and buy this flashing and give it to the roofer? What about the diameter of the flashing. If I am using 8" SS insulated double wall what size flashing will I need? Thanks

-- ed hawks (ehawks@earthtech.com), April 03, 2002

Answers

I personally have had bad experiences with metal flues. They just don't last, and then there is danger. I know SS is a lot better than plain, but...

The flue size is also dependent upon the stove you get. Not sure we can just guess which to put in, and then buy the stove later? I suppose it is best to err large in this case! :)

For your question, I believe different manufaturers & materials have different tolerances & stand-offs from combustable materials. I hope you get some general help, but the only real answer is to check with the materials supplier & follow their recomendations. To locate the hole, you'll need to know how far from the wall the flue needs to be, etc. I think you best plot this out well ahead of time, and consult with the supplier.

Not sure anyone can add real specific answers to your question? Back in the old days people just built it. Today we have to deal with building codes, lawyers, lawsuits, insurance companies, and so on...

--->Paul

-- paul (ramblerplm@hotmail.com), April 03, 2002.


what part of Mich, ed?

-- Stan (sopal@net-pert.com), April 03, 2002.

I think you should deside on the stove you want and go from there, we installed an insulated metal, called metalbestos(sp?] ourselves but there are others. I think you are really smart to plan and install before the house is done, crawling through our attic is a pain.

I have a medium size stove with a 6" flue/chimmey and it heats our 1,800 sq ft one story home with heat to spare.If you want more feed back ask over on the wood heat list at www.woodheat.org there are a lot of chimmey sweeps that post answers [for free] and most give very detailed answers.

-- Thumper/inOKC (slrldr@yahoo.com), April 03, 2002.


'Twer me I'd go with the 8" metalbestos. If the stove you buy has a six inch pipe you can get an adapter to 8".

Metalbestos or what ever chimney system you use, has their own method of flashing and roof jacks. If you are uncertain about what to use, I'd ask your roofer what every one else is using. I'd imagine that they have installed many, many stove pipes in Michigan.

-- Tis I (really_tis_i@yahoo.com), April 04, 2002.


I would put a masonary flue on a outside wall and sleep better.

-- Mel Kelly (melkelly@webtv.net), April 04, 2002.


The chimney diameter that is specified by a woodstove manufacturer is based on the size of the stove's door opening. The larger the door, the greater the chimney diameter specified. IMHO, the best set up for a woodstove is a straight vertical run of stovepipe and chimney pipe through the ceiling and roof. A straight run will give you a better draft and less smoking. A straight run will be easier to clean. And if you can keep most of the chimney system inside of the house, the chimney will be warmer and consequently you'll have less creosote build-up. The worst chimney system for creosote buildup is an outdoor chimney system alongside of the house. An outdoor chimney is ice-cold at startup and stays cooler during a burn. An outdoor block chimney takes forever to warm up and creosote is being formed all this time before it warms.

In my research, almost all modern woodstoves use a 6-inch chimney system. Older stoves with double doors and Franklin fireplaces and such use 8-inch chimneys, again because of thier large door openings.

A 6-inch Dura-Vent doublewall stovepipe and insultated chimneypipe system is my recomendation.

--Happy trails, Cabin Fever

P.S. Remember chimney diameter is based on door size, not woodstove size.

-- Cabin Fever (cabinfever_mn@yahoo.com), April 04, 2002.

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