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Refractory Crack Repair

guido

guido

Well-known Member
I replaced the bottom and back plate a few years back. The new pieces developed some craks, but not as bad as the original.

I have been patching the cracks with furnace cement. Here is a picture I took this morning. Not looking bad.

May be it will last the season,

Guido.

cvphoto70640.jpg
 
My dad took me to a home site when I was 14 at which he and the other fire department volunteers responded. there was nothing left of the structure except a fireplace with a crack that looked just like that (before applying cement). Were it mine and I was sure the material behind it was non-combustible brick and in no way had exposed wood, I would be OK. If in doubt, I would remove the rear of the hearth from the back, and fire proof the back side of it. Another option would be to just lay up new brick, replacing the old. A third would be to use an insert with blower to cover the cracked brick. I used an insert in mine (though the brick was OK) to increase the efficiency and bring in outside combustion air. Jim
 
Janicholson,

Mine has a metal in the bottom and on all around the fire box. The cracks are superficial and never been right through. A fan will circulate the warm air around the the fire box. I never use it, as it does a pretty good job without it.

It does have an outside air feed, which makes it a bit more efficient. its going on 18 years now since I starter using it. side refractory are both original with no cracks,

Guido.
 
Get what is called a fireback it's a cast iron flat plate that goes against the back of the fireplace to keep from burning the brick out.
 
Kurt v,

I am not sure if the plate is a good idea. It gets hot enough with two pieces burning
hot. That is all I need to keep it confey I have modified the grate, so the wood does
not touch the back.

Guido.
 
David G,

I replaced the bottom and back, a few years back. I just called the manufacturer, and the pieces dropped right in. Probably still available today.

I just wanted a way to keep it from keep cracking. This did the trick,

Guido.
cvphoto70676.jpg
 
David G,

Good thing they make it still. I may have to go that route later,

Guido.
 
The panels for my Lennox fireplace are NLA. I bought a Hargrove refractory panel and cut it with a 4" Ryobi wet saw, worked great. I would recommend both the panels and the saw.
 
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