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Old 09-23-2007, 07:38 PM   #1
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chimney crown


Every post I read says to replace cracked chimney crowns. Can the crown not be repaired? Maybe use a cap that can hold it together after the repair?

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Old 09-23-2007, 08:05 PM   #2
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Most crown leaks are around the terra cotta liner and can be filled in with a sealant if its not cracked too bad.

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Old 11-03-2008, 08:06 PM   #3
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what can I use to fill the cracks?
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Old 11-06-2008, 07:36 PM   #4
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Here is a photo of the crack. Is this going to need to be torn down and rebuilt?
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Old 11-06-2008, 07:39 PM   #5
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Hmm I don't see the picture. I'll try again
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Old 11-06-2008, 08:49 PM   #6
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Here part of an article from a masonry magazine:

As a general rule, if the building was constructed prior to 1872, it should be repaired with a traditional lime-based mortar consisting only of lime and sand, as well as some color pigment. If the building was built between 1873 and 1932, it should be repaired with a mortar that consists of lime, some Portland cement and sand, as well as some color pigment. This is still considered a traditional lime-based mortar. If the structure was built after 1930, it can be repaired with a modern cement-based mortar, although I personally find that some buildings built up to about 1945 are best repaired with a mix consisting of Portland, lime and sand.

Where do I find such materials? Mine was built in 1907 the mortar looks kind of white.
Here is the link to the magazine: http://www.masonrymagazine.com/6-04/repointing.html
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Old 11-08-2008, 08:15 AM   #7
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chimney crown


I think thats a little more than some sealant around the liner!

Yes unfortunately that is a rebuild job to me. The brick on the top half have so little mortar that they appear more like dry stacked.

If your not familiar with brick work, you may want to have a pro come in and do a portion of it. Get it inspected by a certified chimney sweep before lighting a fire again.

I would even suggest red tag and flag the area below so people dont get too close underneath. Some of that almost looks like a fall hazard.
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Old 11-08-2008, 06:06 PM   #8
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That Sir, is a hazardous condition. Get a sweep that does masonry to check that out, and don't even consider building a fire.

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