1. Welcome Hearth.com Guests and Visitors - Please enjoy our forums!
    Hearth.com GOLD Sponsors who help bring the site content to you:
    Hearthstone Soapstone and Cast-Iron stoves( Wood, Gas or Pellet Stoves and Inserts)

Shop stove, chimney question

Post in 'The Hearth Room - Wood Stoves and Fireplaces' started by Dustin, Jan 19, 2013.

  1. Dustin

    Dustin Feeling the Heat

    Joined:
    Sep 3, 2008
    Messages:
    404
    Loc:
    Western Oregon
    So, I'm putting a stove in my shop and plan to vent straight up and out of the roof.

    The issue is, this is not your typical roof. It's flat, plywood with of course flat roofing on top.

    I have explored ceiling supports. Most of these are square with insulation shield. There is no insulation. The plywood roof is about 1/4 inch thick.

    How would one do this?

    Open to pretty much anything..

    This is very new land for me, as the only thing I have inside is masonry chimney with liners..

    Dustin

    Helpful Sponsor Ads!





  2. Dustin

    Dustin Feeling the Heat

    Joined:
    Sep 3, 2008
    Messages:
    404
    Loc:
    Western Oregon
    Another note, the ceiling supports I have seen will stick out above the roof line a ways if I went that route..
  3. Heatsource

    Heatsource Minister of Fire

    Joined:
    Dec 19, 2011
    Messages:
    761
    Loc:
    Northern CA
    1/4" ply wood is not sturdy enough to support a chimney. what is the roof support framing like?
    - you could use a roof support package instead of a ceiling support box.
  4. begreen

    begreen Mooderator Staff Member

    Joined:
    Nov 18, 2005
    Messages:
    49,107
    Loc:
    South Puget Sound, WA
    Could a short, cathedral support be box-framed in?
  5. Dustin

    Dustin Feeling the Heat

    Joined:
    Sep 3, 2008
    Messages:
    404
    Loc:
    Western Oregon
    Framed really good actually. I think the roof sheathing may be thicker then 1/4.
  6. Dustin

    Dustin Feeling the Heat

    Joined:
    Sep 3, 2008
    Messages:
    404
    Loc:
    Western Oregon
    I imagine it could. Again this is new land for me. What's a cathedral support box... And what's a roof support package :)

    Thanks fellas
  7. begreen

    begreen Mooderator Staff Member

    Joined:
    Nov 18, 2005
    Messages:
    49,107
    Loc:
    South Puget Sound, WA
    cathedral ceiling support box: http://www.dynamitebuys.com/store/cart.php?m=product_detail&p=775
    roof support: http://www.dynamitebuys.com/store/cart.php?m=product_detail&p=772

    I'd recommend you also download the installation instructions for high temp pipe like this one:
    http://www.dynamitebuys.com/store/cart.php?m=product_detail&p=772

    PS: Are you sure the decking on the roof is just 1/4" plywood? That seems really thin.
    PPS: What stove will you be connecting and how tall do you anticipate it being from stove collar to the flue cap?
  8. Heatsource

    Heatsource Minister of Fire

    Joined:
    Dec 19, 2011
    Messages:
    761
    Loc:
    Northern CA
    roof support clamps on the pipe and is anchored to the roof sheeting- supporting chimney from the roof.
    ceiling support is framed in on 4 sides inside the home- if you need to you can trim off some of the top metal
    you will also need ceiling trim and a pipe end plate if you go with roof support
    nate379 likes this.
  9. Dustin

    Dustin Feeling the Heat

    Joined:
    Sep 3, 2008
    Messages:
    404
    Loc:
    Western Oregon
    BG, she's an old earth stove with an 8 inch flu. From stove top to cap will be a total of about 18 feet of chimney.

    I had thoughts of running 8 inch single wall inside ( maintaining the minimum clearance to combustible) of course, and then terminating to a 6 inch flue. But, I'm seeing too much of a cost savings with that thought process..
  10. Dustin

    Dustin Feeling the Heat

    Joined:
    Sep 3, 2008
    Messages:
    404
    Loc:
    Western Oregon
    This is where I would like to punch the chimney through...

    Attached Files:

  11. Dustin

    Dustin Feeling the Heat

    Joined:
    Sep 3, 2008
    Messages:
    404
    Loc:
    Western Oregon
    I'm thinking a cathedral support box might work best?
  12. begreen

    begreen Mooderator Staff Member

    Joined:
    Nov 18, 2005
    Messages:
    49,107
    Loc:
    South Puget Sound, WA
    Is the ceiling the roof decking underlayment?
  13. Dustin

    Dustin Feeling the Heat

    Joined:
    Sep 3, 2008
    Messages:
    404
    Loc:
    Western Oregon
    It looks like tongue and groove.....
  14. begreen

    begreen Mooderator Staff Member

    Joined:
    Nov 18, 2005
    Messages:
    49,107
    Loc:
    South Puget Sound, WA
    Yes, is this the underside of the roof?
  15. Dustin

    Dustin Feeling the Heat

    Joined:
    Sep 3, 2008
    Messages:
    404
    Loc:
    Western Oregon
    Sure is. It's exposed as such in the entire shop.( I didn't build it ) :) the picture is from standing on the floor, there is no attic..
  16. begreen

    begreen Mooderator Staff Member

    Joined:
    Nov 18, 2005
    Messages:
    49,107
    Loc:
    South Puget Sound, WA
    Ah good. I didn't think a roof would be supported with 1/4" ply (though it wouldn't surprise me if you found it to be 1/2" ply).

Share This Page