Mash Tun Insulation

Postby Pjam » Fri Nov 18, 2016 13:52

One step up from coats a blankets. I made a ply box, added some spacers, popped in the tun upside down (wrapped in cling film) and filled with expanding foam. :D
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Re: Mash Tun Insulation

Postby tommidolcetto » Fri Nov 18, 2016 14:15

I've been intending to make one of these for a while now...

http://byo.com/stories/issue/item/3315- ... y-projects
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Re: Mash Tun Insulation

Postby Springer » Fri Nov 18, 2016 15:22

Don't forget to do the lid as well, that's where a lot of heat gets out. ;)
S
Edit Or re reading the post I think this a drop it over the tun model. :D

It's a dog life :D
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Re: Mash Tun Insulation

Postby Rolfster » Sat Nov 19, 2016 09:01

tommidolcetto wrote:I've been intending to make one of these for a while now...

http://byo.com/stories/issue/item/3315- ... y-projects


Wow this looks great!
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Re: Mash Tun Insulation

Postby Pjam » Sun Nov 20, 2016 16:25

Springer wrote: Or re reading the post I think this a drop it over the tun model. :D


That's right. I pops on top like a big hat.
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Re: Mash Tun Insulation

Postby Pjam » Sun Nov 20, 2016 16:27

Rolfster wrote:
tommidolcetto wrote:I've been intending to make one of these for a while now...

http://byo.com/stories/issue/item/3315- ... y-projects


Wow this looks great!


Oooo yes. mine does look a bit crude in comparison....... we'll see how it works on Tuesday.
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Re: Mash Tun Insulation

Postby Rolfster » Mon Nov 21, 2016 00:10

Pjam wrote:
Rolfster wrote:
tommidolcetto wrote:I've been intending to make one of these for a while now...

http://byo.com/stories/issue/item/3315- ... y-projects


Wow this looks great!


Oooo yes. mine does look a bit crude in comparison....... we'll see how it works on Tuesday.


Ive only seen this photo on my phone so couldn't really see what you had made.
Looks good, and I'm sure it will make a big difference. The tip about warming the insulation is a good one I thought!
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Re: Mash Tun Insulation

Postby Pjam » Mon Nov 21, 2016 14:14

Rolfster wrote: The tip about warming the insulation is a good one I thought!


I sometimes add a hot water bottle too. Got that tip from yogurt making.
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Re: Mash Tun Insulation

Postby sledgehammer » Tue Nov 22, 2016 17:06

Love this idea
i will have a go at this as soon as i find a outer container big enough to use a mould (60L euro buckets)
spray foam is cheap enough to buy from places like screwfix or tool station etc
at the moment i have a exercise mat and metalised bubble wrap
now you got me thinking i could make something simular for the fermenting vessles too that would help getting the temp rifgr without having to build a FV cupboard (a box inside a box with the gap filled with expanding foam)
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Re: Mash Tun Insulation

Postby Oldstunty » Tue Nov 22, 2016 20:48

Could you get a sheet of hardboard and form it into a circle, hold it together with tape ( lots of tape!) use this as a mould?

getting me thinking now......

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Re: Mash Tun Insulation

Postby Pjam » Tue Nov 22, 2016 22:53

sledgehammer wrote:Love this idea
i will have a go at this as soon as i find a outer container big enough to use a mould


Oldstunty wrote:
getting me thinking now......


Circle would be better I think.
The one thing I did do well was to cover the tun in cling film and use it as a mold.

Brewed today (over night mash) and my new kit had much better insulation than the old blanket method. trapped the heat in really well. The outer box was still cold!
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Re: Mash Tun Insulation

Postby Oldstunty » Thu Jan 05, 2017 11:39

Sorry I didnt take any photos of the mould, I was quite proud of it, too!

I made the mould out of hardboard mounted on a piece of ply and covered it with tin foil (found it easier to work the foil into the corners than the cling film). :thumb:
Placed my pot (which i covered in cling film as it was easier to cover the pot in this than tin foil) on 3 wooden blocks in the middle of the mould. :thumb:
Put a bucket of water in the pot to stop it lifting when the foam expands. :thumb:
Fired in the expanding foam. :thumb:
When the foam had cured ( I gave it 2 days before i looked), I took the mould off.
Image
This is after the mould was removed. Looking good :thumb:

Image
This is where the foam had expanded, then sank back down. :doh:
The dark green at the base has the consistency of Fungus the bogeyman's hanky.

Weird how it dried on the side of the pot and the mould, but not in the centre. :scratch:
Think I'll stick to the tank lagging and blankets I've always used.

Cheers,
Jon :hat:

I enjoy a glass of wine each night for its health benefits. The other glasses are for my witty comebacks and flawless dance moves.
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Re: Mash Tun Insulation

Postby PhatFil » Fri Jan 06, 2017 03:38

did you spray the surfaces with water before squiring in the foam? moisture helps activate it afaik, i recall the window installers dampening all the gaps n joints they filled with the stuff with a spray bottle, and i asked at the time what that was for and they told me it helped activate the foam and bond it to the surfaces??
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Re: Mash Tun Insulation

Postby Anneon » Fri Jan 06, 2017 09:02

I made one of these a few month ago. I found it was best to layer the foam in that I done the base + 25mm,allowed to cure, then I layered the side 100mm (ish) at a time allowing it to cure at each stage. As far as I can tell the foam needs the air to cure (otherwise it would set in the tin?).

I have mashes that can go an hour and a half now losing only 0.5 at most.

Only down side I would say is that I am going to need to make a new one soon as the foam gets a bit battered and dirty over time...
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Re: Mash Tun Insulation

Postby Oldstunty » Fri Jan 06, 2017 11:13

No, I didn't spray the surfaces with water but I did layer the foam.
When I've got the time and money, I'll probably have another go.

Cheers,
Jon.

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Re: Mash Tun Insulation

Postby sledgehammer » Fri Jan 06, 2017 14:28

keep us updated as i still intend to have a go myself if i can save time and money by reading the information you feedback the better
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Re: Mash Tun Insulation

Postby Oldstunty » Fri Jan 06, 2017 15:22

Will do :thumb:

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