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Old 03-20-2008, 03:10 PM   #1
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Leaks around chimney after new roof was put on


We had a new roof put on (tear-down) in December. We've recently had two good rains, and there is leaking coming in at the front and back of the chimney and running down the face of both brick walls inside the house. Inside the house just below the ceiling, the water comes in about 5 feet across (on each of the brick walls) I think it could be the flashings that need fixed. The roofer says it could be the mortar. Hopefully it's the flashings and it will be covered under warranty. If it is the mortar, about how much would that cost if done by the roofer? Or is it something that I could do myself? I do have half a bag of mortar that the roofers left because when the roofers came out and installed the new roof, we needed a new chimney cap.

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Old 03-20-2008, 04:01 PM   #2
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Leaks around chimney after new roof was put on


What were the roofers doing with a bag of mortar?- Usually they just slop on black goop!

Mortar is not used for chimney cap or a crown.

Somebody did something that caused a new water problem. - I put my money on a bad job of flashing. If the chimney is 5' across, it may need a cricket.


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Old 03-20-2008, 04:36 PM   #3
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Leaks around chimney after new roof was put on


I agree with the "Cricket". This is a small "Roof" that runs into the chimney to break up the water flow and usually code states it must be 1/3 the width of the chimney, that is to say that a chimney 3 foot wide the cricket needs to be at least 1 foot 6 inch high.
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Old 03-20-2008, 05:05 PM   #4
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Leaks around chimney after new roof was put on


Regarding the mortar, they said that they used it for the chimney cap.

With that "cricket," is that something that they were responsible for when they installed the new roof, or is it something that goes bad and we're responsible for?

The first time the roof leaked (about 2 weeks ago), he sent someone up (we saw the guy go up with a caulking gun), and he never came to the door to talk to us, so we figured it was all fixed.

This time, when we told the roofer that it was leaking again, he said that his guy (from that first visit) said something like he didn't think it was the flashings, but he thought it was the mortar (this is the first time he mentioned mortar to us as he didn't call us after the first time to let us know what was wrong---we figured they just fixed it.

He thinks it's the mortar because he said if it was the flashings, that it would leak every time it rained.

What do you think?
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Old 03-20-2008, 07:15 PM   #5
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Leaks around chimney after new roof was put on


Framers are responsible as they should know it was needed. Roofers are not carpenters per say, if you ask them they should be able to do it though. Not that they could not do it, but they are a roofing company. Whenever we frame a house we are responsible for things like this. The pink area is whats called the cricket (Please do not laugh at my pix, I can not draw too good!)
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Leaks around chimney after new roof was put on-cricket.jpg  

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Old 03-20-2008, 08:35 PM   #6
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Leaks around chimney after new roof was put on


Run a garden hose first, if the roof is not too steep for you to safely go on it.

1st, let it run at roof shingle level continuously and see if any leak start after 15-30 minutes.

2nd, have the flowage, but not at high speed volume, strike just along the top of the new sheet metal counter flashings they installed. Do the side that you noticed the water stains from in the interior for about the same amount of time.

3rd, Let the water flow at the highest point of the brick work, so that it saturates all of the bricks below it.

Also, before you do any of that, you could take digital photos and take a shot of each side of the chimney showing the roof intersection and the top of the sheet metal counter-flashings. Also take a photo of the new chimney crown splash block they installed with Mortar??? Should have been concrete.

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Old 03-21-2008, 09:37 PM   #7
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Leaks around chimney after new roof was put on


I'd put my money on lazy roofers trying to remove/replace roof without reworking the existing chimney flashing.
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Old 03-21-2008, 11:36 PM   #8
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Leaks around chimney after new roof was put on


sounds like another crap flashing job,didn`t leak without the cricket before
You should post pictures of the chimney,and flashings as we3 can guess all day---you can easily see if the mortar joints are deteriorated,or have moss growing,my question is what does the cement cap look like where the replaced the top cement-probably a poor job,wrong mix type etc.--usually tarring the flashings,although crappy will stop a leak there-POST PICS
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Old 03-29-2008, 07:50 PM   #9
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Leaks around chimney after new roof was put on


Sorry that I don't have pictures to post, but I was up on the roof with the roofer today. He said that the problem is not from the roof work that he just completed. He said that it's from the mortar outside of our chimney, and that his installing our new roof aggravated the problem. So he'll be sending somone he knows who fixes these kinds of problems out to have a look. I will keep you posted as to what he has to say and the cost.
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Old 03-29-2008, 08:32 PM   #10
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Leaks around chimney after new roof was put on


He said that the problem is not from the roof work that he just completed. He said that it's from the mortar outside of our chimney, and that his installing our new roof aggravated the problem. -----wow,something doesn`t sound right there,never heard of a roof job aggravating chimney mortar---did he wear a tophat ??
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Old 03-29-2008, 08:32 PM   #11
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Leaks around chimney after new roof was put on


The new roof aggravated the mortar?I smell B.S
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Old 03-29-2008, 09:46 PM   #12
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Leaks around chimney after new roof was put on


I could see them "aggravating" the mortar where the flashings go in during tear-off if they weren't careful.If thats the case they definitely should have noticed the damage and corrected it accordingly.My guess to is they re-used old flashings
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Old 03-30-2008, 08:16 PM   #13
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Leaks around chimney after new roof was put on


I agree that it sounds like the roofer did not do a thorough job. The flashing is key to the whole things, as it is your line of defense against water. Here's an article with a good diagram about how flashing should be installed. Good luck!

http://www.oldhouseweb.com/stories/Detailed/14072.shtml
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Old 03-31-2008, 01:34 PM   #14
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Leaks around chimney after new roof was put on


The mason went up on the roof and said to "tuck point it and put a better cap on the flu." The charge for him fixing the problem would cost us $415. It was also suggested that we have the whole thing sprayed with a sealer, but I didn't get a price on having that done as well. Sound in line to you?
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Old 03-31-2008, 02:28 PM   #15
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Leaks around chimney after new roof was put on


Yes, that is reasonable. The sealer should not cost too much as an add on, so get that too.

Make sure the flashings are not the source of the leak first though, otherwise you will be spending good money for bad results.

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