Malt bill directly affects attenuation!?

Discussion in 'General Brewing Discussions' started by sbaclimber, Jun 30, 2015.

  1. sbaclimber

    sbaclimber Well-Known Member

    Joined:
    Jul 13, 2012
    Messages:
    946
    Likes Received:
    442
    Trophy Points:
    63
    Location:
    Germany
    I have a feeling that this is a stupid question, but I haven't yet found a satisfactory answer by searching the interwebs....
    Can the type of malt I use directly affect the attenuation I get?

    I have been often brewing the same basic recipe for quite a while now (only change from brew to brew is the hop bill), with consistent results.
    + 6.0 kg Pale Ale
    + 0.5 kg CaraFoam(Pils)
    + consistent mash and single sparge volumes and temp
    + consistent boil time
    + consistent pitching rate
    + temperature control
    => attenuation always 87 - 87.5% !

    2 brews ago I wanted to brew a SMaSH, so I replaced the CaraFoam with 0.5 kg more of the Pale Ale.
    Everything else stayed the same, and low-and-behold, I ended up with an attenuation of 90% :shock:

    Should I chalk the 2.5% increase in attenuation up to the 0.5 kg of Pale Ale vs. CaraFoam, or is this just some fluke that probably occured due to some other facton I haven't accounted for?
     
  2. sbaclimber

    sbaclimber Well-Known Member

    Joined:
    Jul 13, 2012
    Messages:
    946
    Likes Received:
    442
    Trophy Points:
    63
    Location:
    Germany
    PS, never mind!
    I just realised that I had completely over-read this, which directly answered my question. :roll: :oops:
    Source: http://braukaiser.com/wiki/index.php?title=Understanding_Attenuation
     
  3. The Brew Mentor

    The Brew Mentor Well-Known Member

    Joined:
    Aug 19, 2012
    Messages:
    1,039
    Likes Received:
    698
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Mentor, Ohio
    SBA,
    That's a good source. 1# of Carafoam could certainly lower your attenuation.

    Brian
     

Share This Page

arrow_white