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Old 10-27-2011, 07:55 AM   #1
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Capping my chimney


Good morning,

I have recently updated/graded my furnace at home. I used to have an oil based furnace, but have recently upgraded for an electric unit. That being said, there is no need for an exhaust, and therefore my chimney isnt really needed anymore. The installer did "cap" the basement chimney hole (where the exhaust pipes used to connect to the chimney), but he didnt cap the chimney on the roof.

Im wondering what is the best way to cap the chimney on the roof. I managed to get a piece of aluminum, in which I could make a cap out of, or use a little "chimney hat" that my friendly neighbor gave me (he soo nice!!).

Here are a few pics to help illustrate what Im up against.

Here's my chimney, mine is the one on the left. Ideally, Id cap that little square part that's sticking out..


Here's the chimney hat my neighbor gave me...the legs are adjustable so it should fit no problem....



and here's a mock that I made out of paper, of what my aluminum cap would look like...



Installing the hat would be easier, but I want to avoid water issues. Im worried that drifitng snow/rain/ice or whatever could make its way into the chimney....

What would you suggest? Anyone done this before?

Thanks guys!!!

James

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Old 10-27-2011, 10:27 AM   #2
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Capping my chimney


I personally would buy a lower profile rain cap. It will attach more securely, do a better job of keeping out rain and snow, and still provide air circulation.

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Old 10-27-2011, 09:31 PM   #3
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Capping my chimney


James, it sounds as though you really don't need a chimney any more if you won't be having any exhaust to get rid of.

I'm not going to suggest that you get rid of the whole thing, just in case you decide at some time in the future that you might like a wood stove.

Blowing snow is pretty clever stuff...it has a way of getting in places you wouldn't think possible.

I think I might cut some tight fitting foam board, maybe 2 or 3 inches thick, and fit that in the top of the chimney.

Then make up your metal cap, either aluminum or galvanized metal with the sides as long as possible and very snug fitting. Push it in place and caulk the bottom of it so nothing can get in or out.

That should do it.
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Old 10-28-2011, 06:52 AM   #4
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Capping my chimney


Should I be worried about the chimney not having any more air circulation? Some people say I should, others say I shouldnt. Thanks!

Foam in the square hole, is that what you mean?
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Old 10-28-2011, 10:03 AM   #5
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Should I be worried about the chimney not having any more air circulation? Some people say I should, others say I shouldnt. Thanks!

Foam in the square hole, is that what you mean?
Yes.

And maybe you could block off the bottom of the chimney as well.

I don't know why you would need air circulation there, perhaps contact your local building inspector to ask why that might be.

And if the chimney is dirty, have it cleaned...this you can do yourself. The cleaning kits are fairly inexpensive.
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Old 10-28-2011, 07:19 PM   #6
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Capping my chimney


Do you also have an electric water heater?
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Old 10-29-2011, 08:41 AM   #7
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Do you also have an electric water heater?
yep! Why?
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Old 10-29-2011, 09:55 AM   #8
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Capping my chimney


If it were gas, it would need a vent, maybe that vent.
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Old 10-29-2011, 10:30 AM   #9
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If it were gas, it would need a vent, maybe that vent.
That's right Marty, it's usually a B vent for gas.
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Old 10-29-2011, 10:45 AM   #10
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Capping my chimney


like suggested a thick piece of styrafoam board and shape it like a cork for a wine bottle but square so you can tap it down into the opening.take that sheet metal top on that other thing and cut and shape it so it fits like a hat over that opening.....predrill a small hole on each side to take a screw to hold it for future use....i would ace the chicken wire blowing snow and rain are going to work on that chimmney

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