Author Topic: Insulation For Mash Tun  (Read 13401 times)

Offline garyg

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Insulation For Mash Tun
« on: October 30, 2009, 04:00:43 PM »
I have a converted keg (legally obtained) mash tun. I'd like to add some insulation to the tun so that it holds temperature longer and more evenly.  I heat my strike water directly in the mash tun, so the insulation either has to be removable or fire proof.  Any suggestions?
Gary Glass
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Boulder, Colorado

Offline majorvices

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Re: Insulation For Mash Tun
« Reply #1 on: November 03, 2009, 11:13:35 AM »
We are fixing to insulate a 55 gallon SS mash tun. Have you tried plain 'ol water heater insulation? That's what we were planning on trying.
Keith Y.
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Offline james

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Re: Insulation For Mash Tun
« Reply #2 on: November 03, 2009, 11:46:23 AM »
I put some of the bubble foil wrap on my keg mash tun.  Wrapped it around twice and secured it with 3 strips of velcro.  So I can remove it if I want to direct fire it or for cleaning.

Holds heat pretty well, but not as good as the cooler I use occasionally

Offline The Professor

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Re: Insulation For Mash Tun
« Reply #3 on: November 03, 2009, 01:19:33 PM »
I've insulated one of my mash vessels as well as my electric keggle with foam insulation wrap from Home Depot...it's relatively thin and covered with a heavy duty foil material.  A couple of layers does the trick nicely...works like a champ.

using it on the mash vessel was a no-brainer, but I put it around the keggle as an afterthought and saw immediate improvement in both the time it took to come to a boil, and the intensity of the boil.
AL
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Offline majorvices

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Re: Insulation For Mash Tun
« Reply #4 on: November 03, 2009, 01:48:34 PM »
So I assume it is not flammable?
Keith Y.
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Re: Insulation For Mash Tun
« Reply #5 on: November 03, 2009, 01:53:35 PM »
I don't know if you can assume that since the Prof said he has an electric kettle.
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Offline majorvices

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Re: Insulation For Mash Tun
« Reply #6 on: November 03, 2009, 01:55:14 PM »
Ahhh - ooops. I saw that but missed the ball completely!
« Last Edit: November 03, 2009, 01:57:06 PM by majorvices »
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Offline Crispy275

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Re: Insulation For Mash Tun
« Reply #7 on: November 03, 2009, 02:34:07 PM »
While the bubble wrap insulation from Home Depot won't go up in flames, it does melt. I used it for several years while brewing in the Michigan winters, and in time I would forget and light the burners while recirculating the mash and...smell something. It never caught fire, but was unpleasent to smell.

I just used masking tape to hold it to the keg, and in time I would punch a termometer through it into the thermo-probe thingy on the kettle. This worked to also keep it in place.

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Offline The Professor

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Re: Insulation For Mash Tun
« Reply #8 on: November 03, 2009, 04:01:51 PM »
While the bubble wrap insulation from Home Depot won't go up in flames, it does melt.




Right.  You definitely wouldn't want to use this stuff where a burner is involved.    My home made keggle uses a high wattage, 220V  element inside the vessel.  That also allowed me to put some insulating material on the bottom as well (another afterthought that made a measurable difference).
AL
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Offline dontblake

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Re: Insulation For Mash Tun
« Reply #9 on: November 04, 2009, 12:43:30 PM »
I have a 10-gal brewpot that I use for my mash tun.  After the infusion (not directly heated), I wrap an old camping sleeping pad around it and keep it in place with bungee cords.  I lose barely a degree over the course of an hour.

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Offline planet_scott

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Re: Insulation For Mash Tun
« Reply #10 on: November 04, 2009, 01:50:48 PM »
Isn't there a fiberglass insulation with a metal/foil outer layer? Find that and some foil aircraft tape and that might work.
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Offline hophead

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Re: Insulation For Mash Tun
« Reply #11 on: November 04, 2009, 02:38:26 PM »
I use a jumbo silver bubble insulated car windshield sun blocker, modified with velcro.

Best to remove when direct firing the mash tun, which I rarely do. 

Offline hjherbenson

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Re: Insulation For Mash Tun
« Reply #12 on: November 04, 2009, 02:39:52 PM »
I use direct fire kind of... I have a 1/4" steel plate that sits between my mT and the burner, this has help to keep from scorching the wort and I don't worry so much about the insulation catching fire. I went to HD and picked up a roll of waterheater insullation.
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Offline skotrat

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Re: Insulation For Mash Tun
« Reply #13 on: November 04, 2009, 03:27:06 PM »
For whatever reason I do not insulate my SS MashTun.

Just a lid and even in a New England winter I do not lose more that 1-3f over a 90 minute period.

So...

Is the insulation really needed?

Offline hjherbenson

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Re: Insulation For Mash Tun
« Reply #14 on: November 04, 2009, 03:34:15 PM »
Alot depends on the pot...I use a 20gal ss. The wall thickness is less than a keg and so depending on the temp in the garage?even with the insulation my temps will drop 5+ degrees in an hr.
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