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After looking at the latest Farmers
Almanac, and the rising propane prices I have decided that it will be prudent to
install a wood burning stove as a backup heat source. If the power fails
for more than a day I would be without heat, and when it gets very cold and
cloudy my heating system relies entirely on propane which gets expensive!
I did a LOT of research and talked to 2
builders about how to run a metal chimney through a roof. They told me to
use Metalbestos stove pipe for the flue,
this is stuff is insulated to prevent fires. I found 2 sources for the
parts: ACE Hardware, and
Venting Systems. There is a
very useful
Application Guide that I found on the Metalbestos site that helped
immensely. It describes various applications and the components required
to complete them safely.
I began with a big pile of cool looking
stainless and aluminum parts on the floor of my workshop.
I started the installation by cutting a
hole in the 1st floor and framing it in for the finish support. This part
needs to be securely mounted as it takes the entire weight of the chimney, which
can be substantial. I will need 12 feet of double walled Metalbestos pipe
in 3 ft lengths.
 
Here is the finish support mounted, and on the right is a
view of the hole in the floor in my office above with the fire stop joist
shield installed.
 
Here I am cutting the hole and a view of the pink soffit vent exposed.
Note that I cut under the shingle to allow it to overlap the flashing.
It was a chore to cut out the foam insulation! I used a drywall saw and a
lot of sweat to get it cut out. I paid for 4" sprayed in, and got the
benefit of extra thickness where the soffit vent touched the roof.
 
Here
is the flashing going in. And the pipe installed with the Attic Shield around
it. The shield is probably overkill as I intend to box in this section later, but I like the extra heat barrier. The rule is that the
insulated pipe should be at least 2" away from all flammables which explains the
big hole in the roof!
  It
was too dark by the time I had the stove pipe installed to photograph it, here
it is the next day. I hadn't noticed that I had the storm collar installed
off kilter - oh well. I put a bead of high quality silicone around the top
of the flashing.
In theory the top of the pipe should be
at least 10 feet from the nearest part of the roof, I'm not sure I achieved
that, but it looks safe to me.
  Back
inside on the next day, I framed, insulated and drywalled the corner of my
office that the pipe passes through.
Now all I need is the stove! |
