Q&A Cracks in the Fireplace brick grout

QandA Posted By QandA, Jun 18, 2007 at 12:05 AM

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  1. QandA

    New Member 2.
    Staff Member

    Nov 27, 2012

    I was just cleaning the fireplace and noticed that there are some small spaces between the brick and the grout (like a small crack) in the fireback area. It's like the brick slightly separated from the grout.

    Can smoke or CO go into this space (its not very wide, maybe a 1/16th or 1/32nd wide)? Do I need to have the brick re-grouted or can I buy something to fill the spaces? Thanks!


    A fireplace drafts upwards, so there is little chance of spillage into these cavities. They sell a product in caulk tubes which can fill these spaces. Try a fireplace store or a hardware store.
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