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Repairing stone fireplace hearth

Posted by speckledcat (My Page) on
Thu, Feb 9, 12 at 4:03

Our limestone fireplace has a chunk of mortar missing from the raised hearth. It doesn't seem to affect the integrity of the hearth, but it's unsightly. How do I get the mortar used for the repair to match the existing mortar? The mortar is about the color of the light, rough-cut limestone.


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RE: Repairing stone fireplace hearth

Even if you are able to do detective work to find out the brand/color of mortar that was used, mixing it up at this advanced time from the original can mean that the patch won't match. Chisel a small hunk out and visit a brick showroom that also will have mortar samples. A whole bag will be the minimum purchase, unfortunately. Also buy a bonding agent. Chisel out as much loose stuff as you can, apply the bonding agent and mix up the mortar. Apply and wait until it's mostly hard and then tool. If the color doesn't quite match a week or two after it's cured, you can very carefully use some artists acrylics thinned out to make it match better if it's not in a direct heat location.


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RE: Repairing stone fireplace hearth

Hollysprings, thank you for the suggestion. I apologize for the late acknowledgement; sometimes family can intervene in our plans.


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