Old 10-06-2008, 03:42 AM
ross's Avatar
Join Date: Jun 2007
Location: Mansfield England
Posts: 69
Default Re: Cracks with smoke coming from them


I had the same thing before insulation - I ground down with grinder back too brick and recovered the area with fire cement - I also got into the oven and repointed the top of the dome..

Touch wood it seems ok - Ive heard somewhere on the forum that the tubes of firelcay ( in a pump disensor ) are good when the crack is at its widest fill it..

see thread http://www.fornobravo.com/forum/f8/c...over-4843.html (crack in top of over)

Ken gave me some sound advice
Reply With Quote
Old 10-06-2008, 02:04 PM
oventhusiast's Avatar
Join Date: Mar 2005
Location: Boston (area), Ma. USA
Posts: 137
Default Re: Cracks with smoke coming from them

My oven works great, cracks and all! As you heard, they all crack. it's just about the size of those cracks that matter. I used this furnace cement on them before I insulated. (see pic) That cracked slightly afterwards but no smoke or flame coming form them. I then covered the dome with a small layer of heat stop (refractory cement) to hold everything together. It worked ok but I still got some hairline cracks in that and I personally wouldn't recommend a thick layer over the dome because I feel it adds a bit too much to the thermal mass. Which takes a bit more wood and time to get it up to temps. Don't worry too much about it! Gotta Go, I'm heating up my oven as we speak!
Attached Thumbnails
Cracks with smoke coming from them-img_0897.jpg   Cracks with smoke coming from them-img_0899.jpg   Cracks with smoke coming from them-img_0920.jpg   Cracks with smoke coming from them-img_0919.jpg  
View my pictures at, Picasaweb.google.com/xharleyguy
Reply With Quote
Old 10-07-2008, 03:57 PM
Master Builder
Join Date: Oct 2007
Location: Sacramento, CA
Posts: 575
Default Re: Cracks with smoke coming from them

Mine, of cource, cracked too. I put a diamond tipped masonary blade on my angle grinder and, from the outside, I ran the blade over the small cracks as to have a wider gap to fill with mortar. I then used a grout bag to inject the refmix into the groves I cut. This worked fine on the small cracks.

I had two that were bigger - like 1/8 inch or more. For those I again used the angle grinder with blade and cleaned them up so they were uniform in gap. I again sqirted refmix in them but then tapped firebrick wedges in the cracks. This also seemed to do the trick.

Problem was I then had to repair the inside. Wedge tapping left unsightly cracks on the inside. They didn't leak smoke, but looked bad.
Here, I just grout bagged and rubbed mortar into the cracks with my spong.

I waited 6 months and many firings before I started ANY of this.
Hope this helps. Lots of work but I am now crack-free.

Reply With Quote

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
Smoke Venting Dotan Design Styles, Chimneys and Finish 9 09-17-2007 01:45 AM
Smoke sammy Firing Your Oven 8 07-18-2007 05:06 AM
Two holes (not cracks) leaking smoke: mortar or furnace cement? Fio Pompeii Oven Construction 1 07-05-2006 07:27 AM
Cracks in newly fired oven Davy Getting Started 4 05-30-2006 08:07 AM
Small cracks in vent Yahoo-Archive Design Styles, Chimneys and Finish 0 03-19-2005 08:38 AM

All times are GMT -7. The time now is 03:17 AM.

Powered by vBulletin® Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
2006/10 Forno Bravo, LLC