Does anyone know the proper/safe way to install the exhaust pipe of an old woodburning stove through the wall of a shop built from 2×4’s, clad in plywood and Tyvek, and finished in vinyl siding?
So far, I’m pretty sure that I need a B-Vent, but how do I finish the opening where the pipe exits the wall?
Do I use a standard mounting block (like those used for mounting lighting)?
How far past the height of the roof must the pipe clear?
Is there a special cap that I should consider in order to minimize the risk of hot embers escaping?
Whom should I be calling, in terms of professionals, to have this installed if I choose not to do it myself?
With everyone going gas these days it is not easy finding people with know-how for wood burning equipment.
Replies
Big
Don't take this a gospel, I'm no expert.
You need what is called a thimble to go thru the wall.
It has round metal flanges on either side, to mount to the wall and space the pipe away from the burnable wall material.
A cap is good to keep rain out of pipe, a screened one is good if you live in an area where material around can burn.
Asbestos lined double pipe is expensive, but does provide more protection.
How far from the roof depends on the roof pitch and where the pipe is located in regards to the peak.
A table is available, but can't remember where I saw it.
A good source for info is probably your local "certified" chimney sweep.
Good luck
Jeff
Yes to the thimble.
Good chance you'll have to use triple wall, insulated T w/ cleanout, wall closure plate, roof radiation shield, roof jack, storm collar, roof brace, chimney cap,wall bands, fire stops, wall radiation shield.
Tell us more.....
What's the slope of your roof.
How much roof over hang do you have.
B vent hasn't the tempeture rating for this kind application.
L&I wood stove installer.
Google - wood stove+chimney
Who ever invented work didn't know how to fish....
Roof Pitch: 9/12
Overhang: 1 foot
Is it better/safer to go through the roof or outside the wall?
Go thru the roof.
Here single wall can't be closer than 36" to combustables. 18" to fire rated wall. Stack temps rating is to be 2800*. Triple wall in or thru inclosed spaces. Start the TW 24" from the cieling. Stack rise at a guess should be at least 9.5'. Go 1 or 2 more it won't hurt. Stack hieght doesn't include cap.
If you put this in give yourself the benifit of the doupt. Put what Pif said about the bunny slippers in the back of your mind.
Who ever invented work didn't know how to fish....
I got to do that more or less, sans bunny slippers, ( dang that snow was cold on bare feet) when I was about eleven or twelve.
LOL The family has a funny memory of that night. One younger brother stopped in to the bathroom on the way out in midst of the evacuation. he happened to think in all the panic, that maybe somebody would need some tissue paper to blow their nose, so he grabbed the roll of TP. we still remember "The night that ____ saved the toilet paper!".
Excellence is its own reward!
Aw come on.. It was more fun watching you hop around in your bunny slippers... LOL
Who ever invented work didn't know how to fish....
http://www.hearthproductsnetwork.com/woodchimney1.html
Who ever invented work didn't know how to fish....
Great site! Thanks!!
B-vent is for oil and gas burners only. For a wood burner you need a rating for 2200°F last I knew. It may have goine up from there. You meet that with triple wall with stainless liner or with metabestos pipe. It doesn't have asbestos anymore, just a name. Both kinds are sold in a kit with necessary parts when you describe your plan to go through the wall. They'll sell you a thimble, wall m,ount barcket, cleanout T and the pipe with a wall bracket or two, plus the pipe of course. About $800 worth.
Use B-vent and plan on a good chance of an exciting night. It's not fun standing in the snow in your jamies and bunny slippers while the good neighbors on the fire dept spray water all over your belongings.
For draft, the top of the pipe should be two feet above the ridge or three feet above any point within ten feet of it. If you live in dense trees or the lee side of a hill, you may need more.
Do you need info on the interior specs too? Sibgle wall pipe would need to be 18" from any conbustable wall or other flamable material.(Like drapes)
Excellence is its own reward!
Great detailed info. BTW, the guy at one of the building supply places (you know, the big orange one) suggested the B-Vent. Knowing that our gas furnace used one, it sounded pretty logical to me at the time. But then I looked at the size of this big sucker of a stove and thought something wasn't right.
You really know your stuff on these things. Would have hated to have stood there (barefoot, cause I don't have the bunny slippers) watching the workshop that I built go down in flames.
Thx again!
Don't that beat all!?!?!!!
The big orange box is now trying toi kill off it's customers. That sounds like a strange marketing strategy to me.
OK, I've got ity figured out now. You don't die in the flames but you have to buy more tools and lumber to rebuild, increasing demand for product they make profit on...
I used to have a specialty retail wood stove store. Installed several hundred of them. Haven't heard of any burning down.
I'm with Imerc - through the roof is the best way to go. One thing I forgot in the height issue is that you lose 15% draw - on average - for every 90° elbow..
Excellence is its own reward!
Through the roof sounds good. I've got a clear path straight up, with no elbows. I think that's the way to go.
Got another "Big Orange" story. Contacted Builders Edge to buy some vinyl mounting blocks to install light fixtures on the workshop exterior, which is sided in vinyl. Buidler's edge sells these blocks to match the Gentek siding that I used, but they won't sell direct so they refer me to a distributor. No problem, so I go to the distributor. The distributor cannot sell direct to me so they refer me to Big Orange. Big Orange claims that they don't carry the product and cannot special order Builder's Edge products because they don't carry the catalogue.
So, I proceed to explain to the Big Orange millwork desk representative (still maintaining a polite mannerism, despite my frustration with all of the layers to go through to order a simply item that is holding up the whole darn project!!) that he gets the Builder's Edge product from his local distributor, a company named Valor, who gets the product from Builder's Edge. I then proceed to give him his client number with the distributor as well as the product identification number and colour number. Of course he can't find it in his computer, nor in his catalogue, so he calls the distributor (by now it's 5 to 5 p.m.). Of course, the person with whom he spoke told him that they don't have such a product and even if they did, they are not authorized to sell it to Big Orange!
I only need 4 of these blocks, or I would buy them from Gentek, because there they are able to key the order into their computer and have it sent off in about 30 seconds, but I have to buy a box of 10 of each type, which means 20 blocks to satisfy the requirement of 4 blocks.
So, I contact the manager of Big Orange, explain the dilemma, and proceed to give him his client number, product numbers, colour numbers, and the name and extension of a Builder's Edge representative (who offered to help the Big Orange manager get the product because I told her my story) and he tells me that he'll get back to me by tomorrow. Well, tomorrow is today and not only has he not contacted me but he's gone for the day and it's only 2 p.m.!!! My contact at Builder's Edge tells me that he hasn't called her yet, so here we are, feeling like an important customer, while the cold weather approaches and my @#)(@!! entire job awaits about $30 worth of vinly blocks.
I'm probably going to spend $167 on 20 blocks from Gentek, even though the entire batch of siding only cost me $900, just because of the great customer service that I am getting at Big Orange! And they wonder why they are my last resort for buying stuff!
Maybe I am too nastolgic but I remember as a kid, going into these building centres with my dad, and they practically consulted to you, one-on-one, and the person behind the contractor's counter actually knew what you were talking about!
Good thing that I have breaktime to keep me real on these jobs. Is it wrong to strive to do a job good and right? Should I cut every corner and build stuff that will burn down just so that I can give them more business rebuilding it again?
Where are you?
Who ever invented work didn't know how to fish....
Where I am is part of the problem. I love living in Canada but I must admit, customer service in the US is far better. Makes me wonder if the government runs everything here!
Part of your problem is using vinyl and part is trying to do business with Big Orange. Maybe it's the name similarity that entices you.LOL
I just make up the blocks out of MEDEX scraps in less time than you hav invested in this problem already. With vinyl, you could then use your J-chanell around it with good caulk or a backing flashing.
This is a lesson that HD feels compeled to teach us. No special orders unless you love suffering. I realize it's a psuedo-religious thing for some folks so I won't deny anyone the pleasure.
;)
But this kind of thing can happen occasionally with any lumberyard. The difference is that the regular places can rectify it sooner. It is a pretty regular thing for me to find a new product at a builders show and have them tell me, "Yep, Vikings has got it, we deliver to them every week"
Then when I call to order, the guy at the counter knows nothing about it. Another call higher up the ladder and find out that the manager just found out about the stuff last week and they don't have it in stock yet. The manufacturers are driving the demand to the retailer that way. HD ius a dinosaur - too slow to react to the needs of its customer baase. If it ain't on the shelf in fronmt of you, forget about it..
Excellence is its own reward!
I had my doubts about the vinyl, but some of Gentek's Northern Forest siding looks great and is so easy to maintain, and inexpensive. After an issue of FHB on vinyl siding, I decided to give it a try and have no regrets (besides this experience). I didn't buy the stuff from Big Orange, so I have been happy with the quality and the services offered at Gentek.
Thought about making my own blocks but preferred the maintenance free aspect of the vinyl. Don't know how it will last long-term, but hopefully by the time it needs replacing I will have more money for something better.