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Thread: Thoughts on soffit and roof vents needed for new shack being built

  1. #1
    Join Date
    Apr 2015
    Location
    almont
    Posts
    148

    Default Thoughts on soffit and roof vents needed for new shack being built

    Getting close to finishing the soffits and roof on my new 12 x 18 shack I am building. Going to have 12" wide overhangs with 3/8" rough sawn plywood soffit material. Thinking of cutting in the small metal soffit vents on each side. I also plan on installing a 12" x 18" gable end vent on the back wall of the building behind the evaporator. I personally don't like ridge cap vents for the roof and would prefer to add 2 metal can vents on the side of the roof opposite of the side the chimney will exit on. Thoughts/suggestions?
    Clay Stroup
    Stroup's Sugar Bush
    Almont, MI

    2016: 20 taps, 2 gallons
    2017: 80 taps, 12 gallons
    2018: 92 taps, 16 gallons
    2019: 110 taps, 34 gallons
    Mason 2 x 5 flat pan
    Mason Steam Pan finishing set up
    D & G 7" Filter Press
    Next Gen 45 gph RO
    John Deere Gator 4 x 2
    Boiling outside but plans for 14 x 18 shack in near future

  2. #2
    Join Date
    Jan 2006
    Location
    Oneida NY
    Posts
    9,841

    Default

    Make a cupola, that is by far the best way to vent all of the steam generated boiling sap into syrup. The only other good way is to have hoods on the pan and vent the steam thru steam stacks. Even a 2x5 flat pan, when you get boiling properly will fog the shack if you don't have a cupola. In fact, do you think you might someday grow into a 2x6 evaporator with 2 pans? If yes, make a 2x6 cupola now.
    Dave Klish about 1320 taps in '15, doing fewer each year, about 450 planned for 2020 (and after?)
    2012 Mahindra 36 HP 4x4/ loader/cab/heat/AC:-)
    added a gooseneck equipment trailer and F350 to tow it to haul more sap
    3x8 raised flue evaporator
    250 GPH converted to electric, RO by Ray Gingerich
    6.32 KW solar system, 1.48KW is battery backed up, all net metered
    http://s1041.photobucket.com/albums/...anssugarhouse/
    website: www.cnymaple.com

  3. #3
    Join Date
    Feb 2009
    Location
    Honor, michigan
    Posts
    587

    Default

    you will need a lot more venting then just soffit vents and gable end vents to get rid of all the steam. build a copula or use steam hoods and vent out.
    Mike
    1000 taps on vac
    Delaval 78 vac pump
    rebuilt Vermont arch
    Smoky lake maple custom pans
    4 x 11 reverse flow
    Smoky Lake auto-draw
    Smoky lake 2x4 finisher
    wes fab short bank filter press
    600 gallon Zero tank and 4 cage tanks
    650 gallon surge tank
    Deer Run Maple 500 GPH RO
    https://www.facebook.com/WhaleysMapleSyrup?ref=hl

  4. #4
    Join Date
    Apr 2013
    Location
    Derby, Vermont
    Posts
    387

    Default

    are you trying to vent the steam with the gable end vents and soffit vents? if so, i don't think you will be happy with it's performance! if you're adding them to the building to cool the roof... is your roof insulated and is it shingles or steel. if it's not insulated, you don't really need any of the vents... especially if you have a steel roof. the vents are basically only to cool the roof.
    Awfully thankful for an understanding wife!

    “The only place success comes before work is in the dictionary.”
    - Vincent “Vince” Lombardi

    Good luck to all!

  5. #5
    Join Date
    Apr 2019
    Location
    Nashville, MI
    Posts
    52

    Default

    Clay, I think I know what you are talking about. You want to have air flow when the building is closed up, right? I have vents on my 12 x 16 sugar house on either end. Just make sure to put screen on the inside to keep the hornets out.

  6. #6
    Join Date
    Apr 2015
    Location
    almont
    Posts
    148

    Default

    I should have qualified my original question. My thoughts were about proper ventilation for the 10 to 11 months of the year when not sugaring. I am building the shack with a 3'6" x 6'00" cupola which will have opening doors on both sides for when I am boiling. The roof boards are 1" x 12" rough sawn pine topped with 15 pound felt paper and the 250 pd/square Certainteed Landmark shingles.
    Clay Stroup
    Stroup's Sugar Bush
    Almont, MI

    2016: 20 taps, 2 gallons
    2017: 80 taps, 12 gallons
    2018: 92 taps, 16 gallons
    2019: 110 taps, 34 gallons
    Mason 2 x 5 flat pan
    Mason Steam Pan finishing set up
    D & G 7" Filter Press
    Next Gen 45 gph RO
    John Deere Gator 4 x 2
    Boiling outside but plans for 14 x 18 shack in near future

  7. #7
    Join Date
    Jan 2006
    Location
    Oneida NY
    Posts
    9,841

    Default

    In that case maybe just gable type vents might be fine. I have no vents, but my sugarhouse is not that tight.
    Dave Klish about 1320 taps in '15, doing fewer each year, about 450 planned for 2020 (and after?)
    2012 Mahindra 36 HP 4x4/ loader/cab/heat/AC:-)
    added a gooseneck equipment trailer and F350 to tow it to haul more sap
    3x8 raised flue evaporator
    250 GPH converted to electric, RO by Ray Gingerich
    6.32 KW solar system, 1.48KW is battery backed up, all net metered
    http://s1041.photobucket.com/albums/...anssugarhouse/
    website: www.cnymaple.com

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