chimney repair

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Old 08-09-19, 11:14 AM
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chimney repair

I peeled away some ivy to discover the situation shown below. What is the remedy?
Important to know that I live in earthquake land (So Cal). Many thanks.

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Old 08-09-19, 11:27 AM
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Here in the southeast I'd chisel out a little more mortar and repoint it. I don't know if your locale changes things.
 
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Old 08-09-19, 11:51 AM
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I recently did exactly what marksr suggests on my chimney and all in all it was pretty easy. I'm sure a pro would have made it look better than I did, but nobody is up on my roof looking at mortar joints so it's good enough for me.

I followed up by waterproofing the brick with solvent-based ChimneySaver.
 
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Old 08-09-19, 12:21 PM
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Chiseling and repointing it as MArk said is what I would do too. And if you want a bit bigger project, although not that bad, it looks like you could use a new crown. I don't know, maybe what you have is common for that area where you don't have to worry about freezing, but elsewhere a proper crown tapers away from the flue, which it looks like you do have, but it's concrete, not mortar, is about 1-1/2" thick at its' shallowest points, and overhangs the bricks by an inch or two, often with a bit of detail at the outside bottom corner so that water drips there rather than running back to the chimney.
 
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Old 08-09-19, 03:13 PM
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Will chiseling and repointing restore structural integrity to the chimney? The cosmetics don't much matter to me. And is there an "extra sticky" mortar you'd recommend? As for the crown... not only does it not freeze here, in recent years it scarcely rains.

Thanks to all.
 
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Old 08-10-19, 02:31 AM
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I don't know how much structural integrity is gained or loss by just repointing but it will be better than it is now.
I don't know about stickiness [that might have to do with the consistency it's mixed] but some mortars are stronger than others. I've always heard you should use the softest mortar that will do the job.
 
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Old 08-11-19, 08:11 PM
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Angle grinder and appropriate blade and a Mortar Rake tool for angle grinder will allow you to remove the mortar without causing more damage to the chimney. You will have to repair vertical and horizontal mortar lines. Start at the bottom where the problem is the smallest. Repair a three or four rows of mortar and leave if be for a day. Come back at another time and work your way up. If you start work at the top or start chiseling , you may find the bricks all coming loose and the problem a bit more of a problem.
Buy a bag of Mortar mix. The color might not match your existing Mortar. Mix up a cup full or two. Make sure it is not too runny and force it into the joint.
You will want to clean the old Mortar out right down to the brick and about 1/2 to 3/4" deep.
 
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Old 08-11-19, 10:49 PM
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Thank you all. I'll do as you recommend.
 
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