Need Advice Repairing Top Of Masonry Fireplace


Old 07-13-15, 06:57 AM
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Need Advice Repairing Top Of Masonry Fireplace

I need to repair the top of my masonry fireplace cap or whatever it is called due to cracks and loose cement.

My fireplace chimney is brick which passes through the roof of my house and has two flues, one for the fireplace and one for the boiler. The cement that runs from the flues and tapers down to the outside edge of the brick chimney structure so water can run off has developed some cracks and some small pieces have broken off.

What I plan to do is chisel out any loose pieces to get to a sound structure and then fill in any voids and restore the original contour of the top of the chimney.

I need some advice on the best masonry product to use and what other steps I should follow.

Thanks for your help
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Old 07-13-15, 04:24 PM
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A pic might help but your first idea of removing what's lose is 100% correct. You maybe able to install a cap directly, on the brick. There are thousands of caps available.
Old 07-14-15, 05:39 AM
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I would just use regular mortar but pre-mixed bag type N or S will work. Make sure you buy the mix that already has sand so all you have to do is add water. Thoroughly clean the area first, then dampen the old mortar and bricks before applying the new mortar.

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