#1  
Old 01-09-2013, 08:00 PM
Serf
 
Join Date: Nov 2012
Location: Oregon
Posts: 16
Default Calcium Silicate board thickness

PLEASE HELP. I am ready to pour my foundation this weekend. I have 3 pieces on calcium silicate insulation but it measure at about 1 5/8". Other than that issue, it is definitely the good stuff, I bought it at Western Industrial Ceramics. So here is question....Is one layer enough? or should I my more so that I can double on to 3.25-3.5" of calcium silicate. Please help.
Reply With Quote
  #2  
Old 01-09-2013, 08:51 PM
Les's Avatar
Les Les is offline
Il Pizzaiolo
 
Join Date: Sep 2005
Location: Carson City, NV
Posts: 2,852
Default Re: Calcium Silicate board thickness

I thought 2 inches was standard. I went with 4 inches and have zero regrets. Personally I would double up. It won't impede your progress of pouring the foundation so no hurries...
__________________
Check out my pictures here:

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


If at first you don't succeed... Skydiving isn't for you.
Reply With Quote
  #3  
Old 01-09-2013, 10:55 PM
brickie in oz's Avatar
Il Pizzaiolo
 
Join Date: Mar 2009
Location: Whittlesea
Posts: 3,455
Default Re: Calcium Silicate board thickness

I used 40mm thick which is about 1 and a 1/2", it will keep the oven hot for days on end.
Mind you, our climate is Mediterranean like.
__________________
The English language was invented by people who couldnt spell.


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
  #4  
Old 01-10-2013, 11:08 PM
Serf
 
Join Date: Nov 2012
Location: Oregon
Posts: 16
Default Re: Calcium Silicate board thickness

My big issue is that it is going on top of only 1.75" of true concrete. I am thinking I might just double it up so that I dont have any regrets. Follow up question though...How important is insulation under the entrance/hearth? My entire floor will have almost 4" of CalSil, but my hearth is going to only have 4" of vermicrete. Is this going to compress at a different rate than the CalSil?
Reply With Quote
  #5  
Old 01-10-2013, 11:22 PM
brickie in oz's Avatar
Il Pizzaiolo
 
Join Date: Mar 2009
Location: Whittlesea
Posts: 3,455
Default Re: Calcium Silicate board thickness

Quote:
Originally Posted by Salty View Post
My big issue is that it is going on top of only 1.75" of true concrete. I am thinking I might just double it up so that I dont have any regrets. Follow up question though...How important is insulation under the entrance/hearth? My entire floor will have almost 4" of CalSil, but my hearth is going to only have 4" of vermicrete. Is this going to compress at a different rate than the CalSil?
4" is just over kill and a total waste of money.
__________________
The English language was invented by people who couldnt spell.


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
  #6  
Old 01-11-2013, 08:24 AM
Serf
 
Join Date: Nov 2012
Location: Oregon
Posts: 16
Default Re: Calcium Silicate board thickness

Aww Man...Now you have me second guessing doubling up. It certainly would be cheaper to only have one layer. What is the best way to cut the CalSil? Band Saw? Table Saw? Circular Saw?

Also, has anyone tried cutting their fire brick with a table saw with a diamond blade? It obviously isnt a wet saw, but I think that is the best I can do without a big investment.

Now, that I think about it....with they money I save not buying more CalSil, I'll be able to buy the diamond blade...I would guess that is a fair trade off.
Reply With Quote
  #7  
Old 01-11-2013, 09:04 AM
Les's Avatar
Les Les is offline
Il Pizzaiolo
 
Join Date: Sep 2005
Location: Carson City, NV
Posts: 2,852
Default Re: Calcium Silicate board thickness

Quote:
Originally Posted by brickie in oz View Post
4" is just over kill and a total waste of money.
Al, Are you sure about that? I recall reading where some have measured a termperature rise on the bottom of the hearth. I can see it being overkill if you are sitting that thick of board on top of vermiculite.
__________________
Check out my pictures here:

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


If at first you don't succeed... Skydiving isn't for you.

Last edited by Les; 01-11-2013 at 09:28 AM.
Reply With Quote
  #8  
Old 01-11-2013, 12:51 PM
brickie in oz's Avatar
Il Pizzaiolo
 
Join Date: Mar 2009
Location: Whittlesea
Posts: 3,455
Default Re: Calcium Silicate board thickness

Quote:
Originally Posted by Les View Post
Al, Are you sure about that?
Ive only got 40mm of calsil and nothing else under the hearth and after a pizza night we can cook for a week in the oven.

So I am just guessing that 100mm is overkill.

P.S. The hearth only has a thermal mass of 100mm.
__________________
The English language was invented by people who couldnt spell.


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
  #9  
Old 01-11-2013, 01:37 PM
Serf
 
Join Date: Nov 2012
Location: Oregon
Posts: 16
Default Re: Calcium Silicate board thickness

Al,

Do you have Vermicrete under your calsil or is it regular concrete?
Reply With Quote
  #10  
Old 01-11-2013, 02:54 PM
Gulf's Avatar
Il Pizzaiolo
 
Join Date: Sep 2011
Location: Mississippi
Posts: 1,660
Default Re: Calcium Silicate board thickness

Salty,
I wont get into the thickness of the calsil since I don't know how less than 2" perform. What does concern me is that you stated that: "My big issue is that it is going on top of only 1.75" of true concrete"

I may have missed something but, that is just a little over counter top thickness. Not a true weight bearing thickness for a WFO hearth. Is this 1.75" poured on top of some other load bearing structure?
__________________

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.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
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
And yes, you can melt calcium silicate board. brickie in oz Tools, Tips and Techniques 4 09-10-2012 05:46 PM
Homemade Calcium Silicate Board? brickie in oz Finding Building Materials 13 12-21-2011 04:56 PM
Calcium silicate board got wet Dabouv1 Newbie Forum 1 11-01-2011 08:35 AM
Which calcium silicate board? Andrew Beal Getting Started 7 09-11-2010 05:37 PM
Hearth - vermiculite concrete or calcium silicate board? Ben & Relle Newbie Forum 4 09-23-2009 04:05 PM


All times are GMT -7. The time now is 04:52 AM.

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