Get your HBT Growlers, Shirts and Membership before the Rush!


Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Double mashing (2 sets of grain)
Reply
 
LinkBack Thread Tools
Old 04-29-2009, 11:59 AM   #1
COLObrewer
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2009
Location: Pea Green, Colorado
Posts: 2,938
Liked 58 Times on 51 Posts
Likes Given: 4

Default Double mashing (2 sets of grain)

Hi all,
Just sitting here at work thinking. I read somewhere about double mashing with two sets of grain to achieve higher gravity wort. That is to mash with one set of grains and then bring that wort up to temp, replace the grains with a new set of grains and mash with the wort (like if you are limited on mash tun space). What is this called? Does Beersmith have a setting/calculation for this? Or do you just split the grain bill in half? Was thinking of doing this with a barley wine since we currently have only a small cooler (10gal). Also was thinking you could mash to get say 1.25OG to make appx. 24% estimated, then double it with water in the large fermentor to make 12%? Is my theory sound or should I stop thinking? We have a 20 gallon fermentor that's being neglected.

__________________
COLObrewer is offline
 
Reply With Quote Quick reply to this message
Old 04-29-2009, 02:29 PM   #2
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
Vendor Ads 
Feedback Score: 2 reviews
 
Bobby_M's Avatar
Recipes 
 
Join Date: Aug 2006
Location: Whitehouse Station, NJ
Posts: 22,284
Liked 1074 Times on 716 Posts
Likes Given: 28

Default

It's called a reiterative mash. I'm skeptical in its benefit because it still takes 60-90 extra minutes and you might as well just mash once, fully sparge it, and spend that extra hour boiling down. Of course, if you're trying to make 10 gallons of barleywine, two mashes would be required. What is your kettle capacity?

__________________
BrewHardware.com has a new website. Please check it out and let me know what you think!
New 100% Stainless Steel Heating Elements are IN!
Chugger Pumps, Pump Kits, Camlocks, Sightglasses, Clear USA made Silicone Tubing, RIMS, Electric Install Parts, etc. Did you know we are also now a full service homebrew shop selling malt, hops, yeast (Wyeast), etc?
Bobby_M is online now
 
Reply With Quote Quick reply to this message
Old 04-29-2009, 10:28 PM   #3
COLObrewer
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2009
Location: Pea Green, Colorado
Posts: 2,938
Liked 58 Times on 51 Posts
Likes Given: 4

Default

We have a 65 gallon stainless tank we can boil in (only used it with test water so far), the most I would be boiling in it at this point is appx. 20 gallons because our fermentor will hold appx. 18 gallons. Our limiter right now is the tun, hence the question. I see no other way to increase gravity short of boiling for 5 hrs, then you'd have to do two batches anyway, for volume. I'd rather do 2-3 hrs mash time than 10 hrs boil time.

__________________

COLObrewer is offline
 
Reply With Quote Quick reply to this message
Old 04-29-2009, 10:58 PM   #4
snailsongs
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2008
Location: Eugene, OR
Posts: 690
Liked 6 Times on 6 Posts
Likes Given: 1

Default

Quote:
Originally Posted by Bobby_M View Post
What is your kettle capacity?
That is exactly the reason why I'm not at all skeptical of this process. I will be trying this soon when I brew up my first AG RIS. I only have a 7.5 gallon kettle, just big enough to stand over and watch the whole time you're doing a full boil so it doesn't boil over....sux. It is a great option for newbs and cheapskates like me.
__________________
snailsongs is offline
 
Reply With Quote Quick reply to this message
Old 04-29-2009, 11:22 PM   #5
SnickASaurusRex
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2009
Posts: 431
Liked 31 Times on 8 Posts

Default

Mosher talks about this in his book, Radical Brewing. He calls it double double. I think he gives some formulas and some other high gravity techniques. Look up the formula for no sparge brewing for the formulas for gavity.

Do the no sparge for the high gavity then do a pari-gyle with the semi spent grain. You could do it like a batch sparge for times sake. A few buckets should do nicely if you don't have the extra fermenters on hand.

This way you can have two batches for the price of one + a few buckets.

__________________
SnickASaurusRex is offline
 
Reply With Quote Quick reply to this message
Old 04-30-2009, 01:11 AM   #6
COLObrewer
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2009
Location: Pea Green, Colorado
Posts: 2,938
Liked 58 Times on 51 Posts
Likes Given: 4

Default

Quote:
Originally Posted by SnickASaurusRex View Post
Mosher talks about this in his book, Radical Brewing. He calls it double double. I think he gives some formulas and some other high gravity techniques. Look up the formula for no sparge brewing for the formulas for gavity.

Do the no sparge for the high gavity then do a pari-gyle with the semi spent grain. You could do it like a batch sparge for times sake. A few buckets should do nicely if you don't have the extra fermenters on hand.

This way you can have two batches for the price of one + a few buckets.
Have done this, it makes a good small beer as second batch. I think that's where I read it (Radical Brewing) I'll have to peruse it again.
__________________
COLObrewer is offline
 
Reply With Quote Quick reply to this message
Old 04-30-2009, 02:28 PM   #7
Saccharomyces
Be good to your yeast...
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Saccharomyces's Avatar
Recipes 
 
Join Date: Jun 2008
Location: Pflugerville, Texas
Posts: 5,444
Liked 85 Times on 54 Posts
Likes Given: 2

Default

I wouldn't do a reiterated mash unless you have a good plan for a partigyle, you'd waste too much grain to make it worthwhile.

I posted about a partigyle I did here which used a mini-mash, which totally rocked, the smoked porter is on tap now and it's one of the best homebrews I've ever made.

__________________
[How to Calculate Mash Efficiency | Do I Need a Yeast Starter? | My Ghetto Fermentation Chamber | Twitter | 6 Gal. HDPE Fermenters | Slanting Yeast | No Sparge Brewing]

Quote:
Originally Posted by Soperbrew
big brother only monitors facebook and untappd
Saccharomyces is offline
 
Reply With Quote Quick reply to this message
Old 04-30-2009, 02:45 PM   #8
pjj2ba
Look under the recliner
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
pjj2ba's Avatar
Recipes 
 
Join Date: Jul 2006
Location: State College, Pennsylvania
Posts: 3,427
Liked 195 Times on 161 Posts
Likes Given: 22

Default

I did just this last Fall! I normally don't brew big beers, but I was trying to use up that last of the old grain before starting in on the new. I mashed in, and then drained, sparge, etc. as normal but then cleaned out the tun, and put the wort back in, brought it up to mash in temps and added the rest of the grain and proceed as if normal. I can't remember how many lbs of grain I used (17 - 20 lb). I did a normal 90 min. boil (pilsner malt) and had a OG of 1.10 into the fermenter. It took a few tricks, but the final OG was 1.008 or 13% ABV. It's in the keg and will sit there until at least fall.

__________________
On Tap: Ger. Pils, OKZ (std Amer. lager), CZ Pils, Maibock,
Kegged and Aging/Lagering:CAP, CAP II, Wheat lager, Imperial Pilsner, Ger. Pils, OKZ (std Amer. lager), OKZ II (for base malt comparison), light beer - yes, light beer, Belgian IPA, IPA,
Secondary:
Primary: Pale Ale
Brewing soon: Saison
Recently kicked : ( IPA, Bock, Saison,
Pilsner Urquell Master Homebrewer
(1st NYC 2011, 2nd NYC 2012)
P U crowns winners in its inaugural master HB competition
pjj2ba is offline
 
Reply With Quote Quick reply to this message
Old 04-30-2009, 05:00 PM   #9
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
Vendor Ads 
Feedback Score: 2 reviews
 
Bobby_M's Avatar
Recipes 
 
Join Date: Aug 2006
Location: Whitehouse Station, NJ
Posts: 22,284
Liked 1074 Times on 716 Posts
Likes Given: 28

Default

I agree that doing any batch where only the mash runnings are used for a specific beer is extremely wasteful if you don't have any small beer plans for the sparge. The small beer off my English Barleywine turned into one of the best ESB's I've made.

A 28lb maris otter grain bill turned into 5 gallons of 1.15 wort and 5 gallons of 1.055 wort.

__________________
BrewHardware.com has a new website. Please check it out and let me know what you think!
New 100% Stainless Steel Heating Elements are IN!
Chugger Pumps, Pump Kits, Camlocks, Sightglasses, Clear USA made Silicone Tubing, RIMS, Electric Install Parts, etc. Did you know we are also now a full service homebrew shop selling malt, hops, yeast (Wyeast), etc?
Bobby_M is online now
 
Reply With Quote Quick reply to this message
Old 05-01-2009, 12:28 PM   #10
COLObrewer
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2009
Location: Pea Green, Colorado
Posts: 2,938
Liked 58 Times on 51 Posts
Likes Given: 4

Default

Quote:
Originally Posted by pjj2ba View Post
I did just this last Fall! I normally don't brew big beers, but I was trying to use up that last of the old grain before starting in on the new. I mashed in, and then drained, sparge, etc. as normal but then cleaned out the tun, and put the wort back in, brought it up to mash in temps and added the rest of the grain and proceed as if normal. I can't remember how many lbs of grain I used (17 - 20 lb). I did a normal 90 min. boil (pilsner malt) and had a OG of 1.10 into the fermenter. It took a few tricks, but the final OG was 1.008 or 13% ABV. It's in the keg and will sit there until at least fall.
This is more like what I am talking about, what's wrong with doing this?
__________________
COLObrewer is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Double Mashing Rockweezy General Techniques 7 02-03-2009 02:29 AM
All Grain Mashing dsmith1279 Beginners Beer Brewing Forum 3 12-27-2008 02:01 AM
OG - Mashing the Double IPA oswegan All Grain & Partial Mash Brewing 6 10-14-2008 06:29 PM
I'm Mashing! First All Grain ohiodad All Grain & Partial Mash Brewing 11 11-13-2007 03:26 PM
Why Double Decoction Mashing? Schlenkerla All Grain & Partial Mash Brewing 6 04-07-2007 10:43 PM



Newest Threads

LATEST SPONSOR DEALS