#1  
Old 02-10-2010, 12:26 AM
Serf
 
Join Date: Nov 2009
Location: Auckland, New Zealand
Posts: 8
Default Which calcium silicate board?

I am in the process of building up my hearth. I have a concrete slab poured. I have about 80mm on top of the slab to play with that I can add insulation over. I was planning to put down calcium silicate board as mentioned in other posts. Then 3:1 vermiculite cement over the top then my firebricks.

I am trying to find some board but the only stuff I can find is only rated to a 90 degrees celsius working temperature. It is supalux brand and is pretty dense (875kg/m3), and water resistant. Is this the right board to use? 90 degrees seems pretty low temp to me. What temp range do I need?

Initally I bought some 25mm kaowool ceramic board rated to 1400 degrees but am dissapointed as it is very soft (200 kg/m3) and It looks like it will absorb moisture. Im not sure if its suitable to put the weight of the firebricks on.

Last edited by Andrew Beal; 02-10-2010 at 12:53 AM.
Reply With Quote
  #2  
Old 02-10-2010, 10:36 AM
kebwi's Avatar
Il Pizzaiolo
 
Join Date: Aug 2009
Location: Seattle, WA, USA
Posts: 1,011
Default Re: Which calcium silicate board?

May I ask how you decided on 3:1? I don't think I've ever seen that written anywhere? I thought most recipes started at 4:1 and went up from there.

I used InsBlock 19 board, which has lower temperature tolerance than the other kinds of boards, but is high enough for an oven (I don't think it can be used to directly line a kiln or forge for example).

I have no idea if you can get it in NZ though.
__________________

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

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

Thread:
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 02-10-2010, 03:16 PM
Journeyman
 
Join Date: Jun 2008
Location: Melbourne Australia
Posts: 399
Default Re: Which calcium silicate board?

Quote:
Originally Posted by Andrew Beal View Post
I am in the process of building up my hearth. I have a concrete slab poured. I have about 80mm on top of the slab to play with that I can add insulation over. I was planning to put down calcium silicate board as mentioned in other posts. Then 3:1 vermiculite cement over the top then my firebricks.

I am trying to find some board but the only stuff I can find is only rated to a 90 degrees celsius working temperature. It is supalux brand and is pretty dense (875kg/m3), and water resistant. Is this the right board to use? 90 degrees seems pretty low temp to me. What temp range do I need?

Initally I bought some 25mm kaowool ceramic board rated to 1400 degrees but am dissapointed as it is very soft (200 kg/m3) and It looks like it will absorb moisture. Im not sure if its suitable to put the weight of the firebricks on.
Go and see your local Pyrotek agent they should have it. The brand we have in Aus. is Skamol
Reply With Quote
  #4  
Old 02-10-2010, 09:08 PM
Serf
 
Join Date: Nov 2009
Location: Auckland, New Zealand
Posts: 8
Default Re: Which calcium silicate board?

Thanks for the info. Ill keep looking but Im having trouble finding any board in NZ other than the kaowool. I might have to use vermiculite concrete for the whole hearth 4:1 as stated.
I found this thread about using the kaowool board. Looks likes its no good at all. Pity Ive got three sheets of it...

http://www.fornobravo.com/forum/f6/k...oard-2588.html (Kaowool Refractory Ceramic Fiber Insulating Board)
Reply With Quote
  #5  
Old 02-10-2010, 09:24 PM
Journeyman
 
Join Date: Jun 2008
Location: Melbourne Australia
Posts: 399
Default Re: Which calcium silicate board?

You have a refractory company in NZ that may be able to sell you some, try Andreco-Hurll.
Reply With Quote
  #6  
Old 05-17-2010, 02:35 AM
DWC DWC is offline
Serf
 
Join Date: May 2010
Location: New Zealand
Posts: 2
Default Re: Which calcium silicate board?

I have just brought some calcium silicate board from the Crow Refractory, 20 McLaughlins Road, Wiri, phone: 09 278 2005. Very helpful and also stocks ceramic blanket.
Reply With Quote
  #7  
Old 09-11-2010, 06:33 PM
Peasant
 
Join Date: Aug 2010
Location: Hamilton,NewZealand
Posts: 29
Default Re: Which calcium silicate board?

Certec in auckland sell the insulating blanket for $30 per meter(600mm width)or 7.6 meters for $150.They also sell the board but im not sure on the price.

ph 09 8202240

Last edited by Swampy; 09-11-2010 at 06:35 PM.
Reply With Quote
  #8  
Old 09-11-2010, 06:37 PM
Journeyman
 
Join Date: Jun 2008
Location: Melbourne Australia
Posts: 399
Default Re: Which calcium silicate board?

Heck you guys get ripped off in NZ. We sell blanket from $75/7.2m roll.
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
Kaowool Refractory Ceramic Fiber Insulating Board Ken524 Getting Started 24 06-14-2010 09:49 PM
Conflict: keep insulation board dry, soak bricks before mortaring kebwi Tools, Tips and Techniques 6 11-08-2009 01:21 PM
Hearth - vermiculite concrete or calcium silicate board? Ben & Relle Newbie Forum 4 09-23-2009 05:05 PM
Cal-Sil Board specifications - more than one? Roadkyng Pompeii Oven Construction 3 02-22-2009 07:10 AM
has any one used calcium silicate board berryst Getting Started 3 06-30-2008 07:11 PM


All times are GMT -7. The time now is 04:05 PM.

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