[TheForge] Stack Cover

[Chris Worsley]

Marsha,
When I was burning coal, I had a cap on the top of the pipe that was 
made for a fireplace I think. It was big, closed on top and had lots of 
openings around the sides and lined with screen to stop sparks. Since I 
had a big sqiurrel cage furnace blower in the line above the hood, I had 
no problem getting smoke out!  Never had a drop of rain get in thru that 
cap partly because it was so wide.

Darrylls idea is good if there is not a "no wind frog strangling 
downpour" going on. I should think his adaptation needs a little wind, 
anything but straight down rain. (You'd use a 10" piece 4' long. Remove 
the cap)
To try to make it a little clearer:
Put a drinking glass on the table, with you holding a straight sided 
pitcher upside down over it with the pitcher's open end overlapping the 
top of the glass. (the top of the glass just inside the pitcher)
Now cut off the bottom of the glass and the bottom of the pitcher, and 
you have two vertical tubes, one barely inside the other. As long as the 
rain comes down at an angle, it hits the inside of the big tube on top 
and runs down the sides and out the space at it's bottom, just below the 
top of the smaller tube.
That's how I see it - time to climb back up on the roof. . . .

Chris
AZ

Riverbend Blacksmiths wrote:

> I too just finished installing a stack (an 8" black stove pipe)  
> through the steel roof of my shop. It connects down to a thick sheet  
> metal chimney that I built and welded up in the shop. It draws very  
> nicely from the side (side draft). I bought an off-the-shelf cap that  
> fit the diameter of my 8" pipe, but would like some input from others  
> in the forum to see what's best. We had a lot of rain and driving  
> winds, so there was a nice puddle in my coal ash bucket after the  
> rains that drained on through.
>
> I'm sorry, but I can't understand or picture Darrell's directions  
> that he provided here. Am I the only one?
>
> Marsha.
> Ontario, Canada
> -----
> On Nov 22, 2006, at 11:59 AM, Darrell wrote:
>
>> A 4' section of 14" diameter pipe over the top of your stack would  
>> work the best. Attach the section overlapping the top of your stack  
>> a couple of inches using three one inch channels spaced around the  
>> stack. Rain that enters the top of the 14" piece will hit the side  
>> and fall out the gap at the bottom of the 14" piece onto the roof.
>>
>> Darrell
>>
>> ----- Original Message ----- From: "Lynn and Susan Lang"  
>> <langfarm at together.net>
>> To: <theforge at mailman.qth.net>
>> Sent: Wednesday, November 22, 2006 5:38 AM
>> Subject: [TheForge] Stack Cover
>>
>>
>>> Hello
>>>
>>> What turns out to be the best cover for the forge stack?
>>>
>>> Want to keep rain and snow out but allow smoke out...
>>>
>>> I put up a 12" pipe, told that anything smaller will not be  
>>> adequate...
>>>
>>> Thank you
>>>
>>> lynn
>>>