Why does firewood foam?

Discussion in 'Random Ramblings' started by lengel, Nov 19, 2009.

  1. lengel

    lengel Chillin' With My Peeps

    Apr 30, 2008
    I bought a few cords of firewood last year and am burning it now.

    Some of it is producing foam when I burn it. Does anyone know what this means?
  2. jojo54

    jojo54 Chillin' With My Peeps

    Aug 24, 2009
    BC Canada
    Moisture boiling off? [​IMG]
  3. Equus5O

    Equus5O Chillin' With My Peeps

    The foam is from moisture, so I'd have to say the wood is not seasoned.
  4. Opa

    Opa Opa-wan Chickenobi

    May 11, 2008
    Howell Michigan
    If you bought the wood last year I'd say that it is "seasoned". It most likely the sap in the wood.
  5. jafo

    jafo Chillin' With My Peeps

    May 2, 2009
    Usually when wood "foams" while it's burning is because it's green, unseasoned. If it's been down a year, it should be seasoned, but the moisture content could still be high if it was down in log form, not cut into chunks. Another factor would be the amount of rain it's been exposed to, and the way it's piled. If it's been raining a lot in your area, and the woods uncovered, good dry wood's like a sponge to a point. I always pile our wood "bark side up" and cover it only on top. That way if it gets rained on, the bark, or the smooth side sheds the water, all the way through the pile. By covering it only on top, and not wrapping it like I see so many do, the wind can breeze through it to wick away any moisture from the drying process. 6% moisture content is ideal. ( I don't know how the pros get that reading ) TOO DRY can be too hot, and if you don't take care of your flue, and have a lot of creosote, ( from burning wet wood ) really dry wood is asking for a chimney fire. There's nothing like a good wood fire. Penetrating, cozy, and warm. Just my opinions,,,,,,,,,,,,be careful,,,,,,,,,,,,[​IMG]
    Last edited: Nov 20, 2009
  6. lengel

    lengel Chillin' With My Peeps

    Apr 30, 2008
    Thank you. Very valuable information. I need to stack it properly next time - pretty sure it's a moisture issue but the wood is inconsistent through the stack.
  7. Big C

    Big C J & C Farms

    Dec 15, 2008
    Vernon Texas
    Moisture content of the wood. Seasoned or unseasoned.
    If it is not covered/kept dry with some ventilation for an extended period before using your wood will not burn with the maximum efficiency.
  8. pinkchick

    pinkchick "Ain't nuttin' like having da' blues"

    May 30, 2008
    Washington State

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