#1  
Old 11-09-2009, 07:53 AM
Serf
 
Join Date: Nov 2009
Location: Los Angeles, CA
Posts: 12
Default Perlite vs. Vericulite final Insulation layer

I am waiting the 3 weeks for my 6" Cladding to dry and am wondering if I should use Vermiculite loosely, mixed 6:1 with portland cement, or use Perlite.
I build a brick wall up from the base, so now I have a 5" gap between the cladding and the final wall, so I can pour anything in there. Is one better than the other. They both cost exactly the same, and the Vermiculite says 100% Asbestus free certified on it.

Thanks for any suggestions.

Christian
Attached Thumbnails
Perlite vs. Vericulite final Insulation layer-oven-brick-2.jpg   Perlite vs. Vericulite final Insulation layer-oven-cladding-2.jpg  
Reply With Quote
  #2  
Old 11-09-2009, 01:55 PM
nissanneill's Avatar
Il Pizzaiolo
 
Join Date: Apr 2007
Location: Adelaide, South Australia
Posts: 1,865
Thumbs up Re: Perlite vs. Vericulite final Insulation layer

newimaging

Quote:
I am waiting the 3 weeks for my 6" Cladding to dry
why wait, get some 'gentle' fires going, not to bake the oven but add alittle heat to encourage the drying process. It will get the air moving, drive a little heat into the dome and accelerat the evaporation process. Remeber to take it gently. See what moisture is coming out through the bricks before increasing the temperatures.

As far as your insualtion, I would be tempted to line the back of your outer wall with a thicker 'caterers aluminium foil' and pour in vermiculite. This will give the best (well at least in my opinion), as 5" is all that is needed, the foil will add that extra protection and keep it dry should moisture get through the bricks in a wet period.

Neill
__________________
Prevention is better than cure, - do it right the first time!

The more I learn, the more I realise how little I know


Neillís Pompeiii #1

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Neillís kitchen underway

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #3  
Old 11-21-2009, 04:33 AM
Il Pizzaiolo
 
Join Date: Mar 2009
Location: USA
Posts: 1,436
Default Re: Perlite vs. Vericulite final Insulation layer

I chose the medium grade vermiculite from ULINE shipping supplies.. Worked fine for me.. and as i understand, Vermic is 100% natural.. I dont know if the perlite is or not.. If you are Just filling the voids, you dont need to mix with portland.. only pour it in.. you can mix it,, Im not sure if that makes a difference ... Maybe someone else can verify that ??
you can sometimes buy premixed vermicrete from a Pool building supply company..
Cheers
Mark
Reply With Quote
  #4  
Old 11-21-2009, 05:50 AM
dmun's Avatar
Moderator
 
Join Date: Jul 2005
Location: New Jersey USA
Posts: 4,216
Default Re: Perlite vs. Vericulite final Insulation layer

Quote:
Vermic is 100% natural..
They're both naturally occurring minerals with the strange property of "popping" like popcorn when heat treated. This is what perlite looks like:



This is what vermiculite looks like:



Quote:
Vermiculite is the short mineroligical name for hydrated laminar magnesium-aluminum-ironsilicate which is similar to mica in appearance. Vermiculite is light-weight, fire-resistant, odorless, absorbent, and expands into accordian shaped pieces when heated also known as being "Exfoliated". These pieces of exfoliated vermiculite insulation sometimes resembles worms, hence the prefix "vermi" which is latin for worm.
__________________
My geodesic oven project:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
,
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #5  
Old 11-21-2009, 02:29 PM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,692
Default Re: Perlite vs. Vericulite final Insulation layer

If you mix vermiculite or perlite with cement and water you then have the problem of removing the water by a combination of air movement, temp. and time. Add the stuff dry and you have less water to remove from your oven. Be careful about using a foil layer for added insulation. It does a great job of locking in the moisture. I tried this and my oven took months to dry properly. At least poke lots of little holes all over the foil to allow the steam out.
Reply With Quote
  #6  
Old 11-21-2009, 04:26 PM
Neil2's Avatar
Il Pizzaiolo
 
Join Date: Oct 2006
Location: Vancouver Island
Posts: 1,374
Default Re: Perlite vs. Vericulite final Insulation layer

"This is what perlite looks like:"

That's what the "un popped" stuff looks like. (If if looks like the above photo, don't use it.)
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Perlite or Vermiculite insulation ? newimaging Tools, Tips and Techniques 6 11-09-2009 10:13 PM
fiberglass insulation between concrete and vermiculite insulation layer pabsey Introductions 6 07-19-2009 10:47 AM
best method for perlite insulation on dome builder brad Getting Started 2 09-17-2008 03:44 AM
silver foil - insulation layer ross Modular Refractory Oven Installation 3 08-21-2008 09:59 AM
Hearth insulation -- which layer on top? Yahoo-Archive Getting Started 0 03-20-2005 02:06 PM


All times are GMT -7. The time now is 04:53 AM.

Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
© 2006/10 Forno Bravo, LLC