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Old 10-04-2011, 03:40 PM   #1
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Chimney repair


Chimney Repair
My chimney was inspected and I was advised to get a new crown. The repairman suggested I waterproof the chimney bricks. My house is 45 years old and it was built with used brick and they all look fine, including the chimney. Is there any real benefit to have the bricks waterproofed now? Also, I wonder how long a waterproof treatment would last.

Also, looking at my chimney, about one foot from the top are 3 or 4 rows where the brick mortar is darker than on the rest of chimney. Is that something I should be concerned about? And would you know why the mortar would be darker?

Thanks,
Jerry
10/4/11

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Last edited by Jerry8C; 10-04-2011 at 03:42 PM. Reason: Clarify
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Old 10-04-2011, 03:53 PM   #2
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would you know why the mortar would be darker?

Soot zone.

The bricks won't heal themselves and they aren't getting any younger. Sealing them can't hurt anything and may extend their usable life.

I'll bet the whole thing could use a new pointing job.

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Old 10-04-2011, 05:19 PM   #3
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I got quotes of $400-500 to apply "ChimneySaver" to my Chimney.

From what I can see the amount of ChimneySaver required for me would be about 2 gallons, and that's assuming a couple of coats (1 gallon = 100 sq-ft).

Based on the price to buy Chimney Saver a lot of the cost is labor.
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Old 10-04-2011, 05:41 PM   #4
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The dark spot could be water leaking down from the bad crown.
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Old 10-04-2011, 07:23 PM   #5
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Originally Posted by bubbler View Post
I got quotes of $400-500 to apply "ChimneySaver" to my Chimney.

From what I can see the amount of ChimneySaver required for me would be about 2 gallons, and that's assuming a couple of coats (1 gallon = 100 sq-ft).

Based on the price to buy Chimney Saver a lot of the cost is labor.
Most of the cost is probably liability insurance, followed by labor. People who work on roofs tend to have high insurance premiums i think.
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Old 10-04-2011, 07:41 PM   #6
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Most of the cost is probably liability insurance, followed by labor. People who work on roofs tend to have high insurance premiums i think.
Absolutely, and I didn't mean to suggest it was excessive or anything--equipment, people, insurance, etc all have a price. In fact, when you consider it will probably take at least an hour or two to do it a good job of it I think the "labor" part of the price is reasonable.

My intent was really to say to the OP that if he's on the fence about it, and handy with a ladder, he could do this part of the work himself for not too much money.
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Old 10-04-2011, 08:02 PM   #7
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Thanks to all who responded. I should have included a picture with my first post, so I have included one in this post in case anyone would have additional comments. I have had three estimates and only one talked about removing old mortar. However, he was more into chimney restoration and I sort of felt he was suggesting more work than necessary. In fact, the dark mortar I spoke about he attributed to being soft mortar where water had soaked in. The other two estimators did not agree. I plan on getting one more estimate and I will ask him about repointing, etc.
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Old 10-04-2011, 08:16 PM   #8
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If the bricks are solid then repointing is a good idea. The concrete cap definitely needs replacing. The brown is rust marks from cap. Some high temp rust pain would reduce that issue.
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Old 10-05-2011, 06:19 AM   #9
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You should have the cap redone and have the chimney tuck-pointed.
Here's a link to some info on tuck-pointing -
http://www.maconline.org/tech/mainte...t1/point1.html
Note what they say concerning the relative strength/hardness of
the brick in relation to the to the mortar used.

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