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Old 11-20-2013, 08:01 AM   #1
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Question about fireplace refractory panels


I have a pre-fab fireplace built around 1995 that has three cast stone (imitates brick) refractory panels making up the walls. It appears there is no mortar between the two seams separating the panels. On the left side, the left and center panels line up perfectly so the seam between the two is straight and hardly noticeable, but on the right, the right-side panel is tilted back ever so slightly to reveal a gap between the right and center panels. Do I need to buy some fireproof mortar to seal these gaps, especially the one on the right? Is this something I can buy at Home Depot or Lowes? Do these gaps need to be sealed at all?

I would like to avoid having them replaced, if possible. I have read of old refractory panels that crumble or develop cracks. Mine look like they are in good condition except for the gaps between the panels.

Any advice would be appreciated. I hope I've brought this question to the right place and that my description above will help. Thanks.

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Old 11-20-2013, 12:05 PM   #2
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Question about fireplace refractory panels


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Originally Posted by longislander2 View Post
I have a pre-fab fireplace built around 1995 that has three cast stone (imitates brick) refractory panels making up the walls. It appears there is no mortar between the two seams separating the panels. On the left side, the left and center panels line up perfectly so the seam between the two is straight and hardly noticeable, but on the right, the right-side panel is tilted back ever so slightly to reveal a gap between the right and center panels. Do I need to buy some fireproof mortar to seal these gaps, especially the one on the right? Is this something I can buy at Home Depot or Lowes? Do these gaps need to be sealed at all?

I would like to avoid having them replaced, if possible. I have read of old refractory panels that crumble or develop cracks. Mine look like they are in good condition except for the gaps between the panels.

Any advice would be appreciated. I hope I've brought this question to the right place and that my description above will help. Thanks.


As a general rule of thumb,all the joints in a fireplace need to be sealed,or the bricks start to crumble,so I would assume that holds true for your panels as I would guess they are made from the same refractory material,or a close kissing cousin.

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Old 01-13-2014, 11:09 AM   #3
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Question about fireplace refractory panels


Thanks, Canarywood. There are no bricks. The firebox is made of three solid vertical panels that appear to have an imprint of bricks and mortar on them. The panels are in excellent condition (In one piece without cracks), except that where they meet, there is nothing that seems to hold the three together. As a result, there is a small even gap on the left and a larger uneven gap on the right where the right panel seems to be tilting backward a bit. I was just wondering if I could buy some refractory cement or some other sealer to close up the gaps between the panels.

Any advice would be appreciated. Thanks.
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Old 01-13-2014, 12:20 PM   #4
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Question about fireplace refractory panels


The refactory panels in factory built FP's are meant to be a loose fit which allows for movement when the steel heats up and cools down, and subsequently expands and contracts........
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