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  #1  
Old 06-08-2009, 09:34 AM
Peasant
 
Join Date: Apr 2005
Location: Nr Southampton, Hampshire, UK
Posts: 36
Default Insulation question - loose or solid vermiculite covering?

I have built a fire brick dome (approx size of Casa90) and the surrounding walls. I have lots of vermiculite for the insulation. I was planning to just pour the loose vermiculite in the gap. Or should I mix with cement for a solid covering over the dome? Or does it make no difference...?

Thanks
James
(Pictures/movies coming soon)
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  #2  
Old 06-09-2009, 03:47 AM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,828
Default Re: Insulation question - loose or solid vermiculite covering?

By adding cement and water to the vermiculite to make it set will add considerably to its density and hence reduce its insulation value. Also the water needs to be removed because wet insulation doesn't work well and the steam it produces will create problems. If you can add the vermiculite loose it would be better although there may be a possibility of the vermiculite leaking out if you got a hole in the side of the enclosure.
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  #3  
Old 06-09-2009, 04:32 AM
Peasant
 
Join Date: Apr 2005
Location: Nr Southampton, Hampshire, UK
Posts: 36
Default Re: Insulation question - loose or solid vermiculite covering?

Thanks - just what I was thinking.

There is no danger of a leak - the enclosure around the dome is brick - if that gets a hole, leaking vermiculite is the least of my worries

James
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  #4  
Old 06-09-2009, 08:04 AM
Serf
 
Join Date: Jun 2009
Location: UK
Posts: 5
Default Re: Insulation question - loose or solid vermiculite covering?

For all us Newbies in the UK, where did you get the vermiculite from and is there a particular type/description we should look out for?
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  #5  
Old 06-09-2009, 11:09 AM
Peasant
 
Join Date: Apr 2005
Location: Nr Southampton, Hampshire, UK
Posts: 36
Default Re: Insulation question - loose or solid vermiculite covering?

Hi Pault99

I could not find cheaper Vermiculite than from here:
Vermiculite V4 100 Ltr 429758 : Wilsinc

I got 5 bags (so got free delivery) - I have not used it yet (should do this weekend) so can't be 100% sure this is the right stuff - but I think so. I believe any Vermiculite (called Micafil a lot in the UK) for loose insulation is fine.

I might have bought too much - so might have some going soon.

Also see my other thread in the barter/trade forum, where I might have some storage heater bricks going cheap soon - cheaper than the 2.50 per brick I paid at the local builder merchant !

James
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  #6  
Old 06-11-2009, 10:07 AM
Laborer
 
Join Date: May 2009
Location: Jupiter Florida
Posts: 67
Default Re: Insulation question - loose or solid vermiculite covering?

Does anyone know if you can use packing vermiculite, grade 4, as seen in photos attached.
I can pick some up but, need to know if it can be used?

Thanks, Bob
Attached Thumbnails
Insulation question - loose or solid vermiculite covering?-verm-1.jpg   Insulation question - loose or solid vermiculite covering?-verm-2.jpg  
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  #7  
Old 06-21-2009, 08:42 AM
Serf
 
Join Date: Sep 2007
Location: Suffolk UK
Posts: 23
Default Re: Insulation question - loose or solid vermiculite covering?

Does anyone know where I can get insulfrax or the equivelent in the UK from someone who is prepared to sell in small enough quantities ie a pompei oven!!
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  #8  
Old 06-22-2009, 02:42 PM
Peasant
 
Join Date: Dec 2008
Location: North London, UK
Posts: 39
Default Re: Insulation question - loose or solid vermiculite covering?

Have you searched for questions on UK materials? Midland Refractories and somewhere in Sheffield seem to come up most often as recommendations. Have a look around and you'll find a few threads with suggestions in.

cheers,


dave

ps - I used Midland refractories, for what it's worth. Small quantities are fine, but the delivery charge is steep.
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  #9  
Old 06-22-2009, 03:27 PM
james's Avatar
Brick Oven Merchant
 
Join Date: Mar 2005
Location: Pebble Beach, CA
Posts: 4,648
Default Re: Insulation question - loose or solid vermiculite covering?

Hey guys,

We are close to having FB UK set up and stocking accessories, including oven tools, insulating blankets and chimney pipe. If you are on a deadline -- don't wait for us. :-) Otherwise, stay tuned, and we will let you know when we can start filling orders.
James
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  #10  
Old 06-22-2009, 03:58 PM
Journeyman
 
Join Date: Jun 2008
Location: Melbourne Australia
Posts: 399
Default Re: Insulation question - loose or solid vermiculite covering?

Quote:
Originally Posted by shepster View Post
Does anyone know where I can get insulfrax or the equivelent in the UK from someone who is prepared to sell in small enough quantities ie a pompei oven!!
You would have a local Thermal Ceramics or Morganite agent nearby.
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