BIAB bag question - Home Brew Forums

Register Now!
Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > BIAB bag question

Thread Tools
Old 08-13-2013, 07:54 PM   #1
Aug 2013
Posts: 52

Hi everyone,
What are BIAB bags made out of? Among them, which has the best properties like handling heavy grains? And also what size should the holes in the bag be?

I am a 1-gallon brewer so that is not that important now, but if I do 5 gallon batches in the future, the bag should be able hold the grains of my 5 gallon batch.

Reply With Quote
Old 08-13-2013, 08:11 PM   #2
Rockn_M's Avatar
Jan 2013
Dallas, Tx
Posts: 1,650
Liked 347 Times on 258 Posts

I picked up 5 gallon paint bags from Home Depot. They are pretty durable, easy to clean and cheap! I had one tear at the seam but that was my fault when dumping the spent grains.

Reply With Quote
Old 08-13-2013, 08:16 PM   #3
Lost in a Maze
LabRatBrewer's Avatar
Dec 2011
Laguna Niguel, CA
Posts: 3,062
Liked 1054 Times on 732 Posts

Wilserbrewer is a vendor on HBT, and his BIAB bags are extremely nice quality at at very good price. He custom makes them for the size of your pot. I have made many batches with his bags from 5 gallons to 11 gallons. (My pot is 15 gallon).

Reply With Quote
Old 08-13-2013, 08:22 PM   #4
Heavyweight homebrewing author & shootist of air
unionrdr's Avatar
Feb 2011
Sheffield, Ohio
Posts: 38,975
Liked 3691 Times on 3171 Posts

I use a paint strainer bag,5 gallon made out of course weave nylon. Medium weave would be better,imo. I use up to 6 pounds of grains or more in mine & it takes it just fine. The nylon is really easy & quick to clean.
NEW books on amazon/Kindle! Check it out now...
Home Brewing-
Distopian Sci-Fi-
New! John Henry-

kojinakata Likes This 
Reply With Quote
Old 08-13-2013, 08:33 PM   #5
jtratcliff's Avatar
Feb 2013
Pasadena, CA
Posts: 1,193
Liked 288 Times on 216 Posts

In general the fabric you want is "swiss voile" ... You can buy the stuff at a fabric store and make your own bag if you're handy that way.

Until recently I was using voile curtains from Ikea (~$4.50 for 2 large panels) and just folding a panel over a few times until it was about he right size to line the kettle. I've read here that people also have used voile curtains from Walmart & Lowes. Either folded or sewn into bag form. The weave on the Ikea curtain is pretty coarse, so you'd definitely want to layer it.

But I have to +1 the Wilserbrewer bag. I just got one and have only done 2 batches with it but it has a nice fine weave and it's much nicer dealing with a properly sized bag rather than the excess fabric of a folded curtain.

kojinakata Likes This 
Reply With Quote
Old 08-13-2013, 09:15 PM   #6
Aug 2012
Aiken, SC
Posts: 1,653
Liked 249 Times on 204 Posts

If you're freindly with a coffee house you may be able to get a large toddy bag for cheap or free. They are nylon mesh bags, made for holding 5+ lbs of coffee, with an elastic band at the opening. It easily holds 10-15 lbs of grain. It's made by a company called Toddy Products. I've had excellent results using it in a bunch of standard mashes and few BIAB mashes.

Reply With Quote
Old 08-13-2013, 11:21 PM   #7
Apr 2012
Charlottesville, Va
Posts: 706
Liked 70 Times on 59 Posts

I use Walmart voile fabric curtains that I have sewn into bags. The Wiserbrewer bags I have seen are great and his strength test proved to me that if built correctly the bags will survive any grainbill a homebrewer is going to attempt.
Suburban Farmhouse Brewery

Primary: Home Hops 15 IPA
Bottled: Huis Koyt, Summer In Sommelsdijk, Trekker Huis ( Tractor House) Saison
Up coming beers: Higgs Special with Homegrown hops

Reply With Quote
Old 08-14-2013, 09:09 PM   #8
BIAB Expert Tailor
wilserbrewer's Avatar
May 2007
Jersey Shore, New Jersey
Posts: 9,590
Liked 1393 Times on 1066 Posts

Yes, polyester voile is the fabric of choice. Size the bag to entirely line your kettle with extra depth to fold over the top. Stitch the bag with a taper at the bottom like shown in my avatar. Stitch the bag, turn inside out and stitch again twice FTW!

A drawstring at the top is handy as well! Cheers! PM me if you have any questions on sewing a bag!

Reply With Quote
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
BIAB question NevermoreBrew BIAB Brewing 23 01-11-2013 09:26 PM
BIAB Question LiquidFlame All Grain & Partial Mash Brewing 10 09-06-2012 05:40 PM
BIAB Question el_caro All Grain & Partial Mash Brewing 95 12-05-2011 05:07 AM
BIAB Question jgoette All Grain & Partial Mash Brewing 41 09-23-2010 12:57 PM
BIAB Bag Question f4an All Grain & Partial Mash Brewing 14 05-03-2010 01:29 PM

Forum Jump