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quigley

12:41PM | 02/27/05
Member Since: 02/26/05
3 lifetime posts
Bvroofing
I live in the northeast (NY - Mid Hudson Valley), and have been fighting a roof leak around my chimney for many years. Originally I had a new roof installed, and new copper flashing embedded in the mortar around the chimney. That seemed to solve the problem for a while. Then, after a few years, in some heavy rains, I'd see a small amount of leaking again. Eventually the chimney crown started cracking, and the chimney itself was in need of serious work, so I decided to have the entire chimney rebuilt. They embedded the original flashing into the mortar. After the first couple of rains, water came flooding in. The chimney guys came back and couldn't find the problem, but decided to seal the chimney and crown. That didn't help. I finally figured out that the flashing cap embedded in the mortar on the peak side of the chimney overlapped flashing from the cricket, where the cricket meets the chimney, and that overlap wasn't sealed in any way. Water was running up into that seam and getting under the flashing. I sealed that seam real good with silicone sealant, and the problem seemed to be fixed (for about a year). But just recently, after some snow sat up there for a while, and then it rained, some water started leaking in again. I can't see where it could be getting in around the flashing, but my best guess now is that it's backing up the cricket, and getting under some asphalt shingles that meet/overlap the cricket. Does anyone have any ideas/suggestions? Here are some details:

size of chimney : 6'2" wide X 2'10" deep X 3'4" high. The chimney begins only 2'6" from the peak of the roof. The shingles are asphalt. The flashing is all copper. A cricket (covered in copper) starts about at the peak and meets the back of the chimney (so the total width the of the cricket is 6'2" where it meets the chimney). The slope of the roof is 5.5 to 12. Since the chimney is so close to the peak of the roof, the slope of the peak of the cricket is almost 0 (it does have a very slight downward slope). The peak of the roof has a ridge vent in it, and that is covered with a cap of pieces of asphalt shingles. The cricket starts right under that cap. Could water be backing up under that cap? I've just tried sealing where that cap meets the cricket, and where the sides of the cricket meet other shingles with 'Henry 208 wet/dry roof cement'. Anything better to use? No rain yet, so I'm not sure if that will fix the leak or not. Thanks very much for any suggestions.

Mike

carlbrown

02:03AM | 02/28/05
Member Since: 01/05/05
83 lifetime posts
Can you take and post a couple of pictures! Even of the cap where it sounds like you need a metal hood to eliminate that leak. Fabricated and sealed at the seems. It does not take a very big whole to let in a bunch of water once it finds a route.

quigley

03:19PM | 03/02/05
Member Since: 02/26/05
3 lifetime posts
Thanks for the suggestion. I'll try to get/post some pictures. Right now it's a little difficult since there is a lot of snow up there. Does the metal cap that you refer to cover the ridge vent at the peak of the roof?

Thanks again, Mike

carlbrown

03:23PM | 03/02/05
Member Since: 01/05/05
83 lifetime posts
they make metal hoods that will cover the top of the fireplace! I am not sure about the ridge vent application you are talking about.

dodgeroof

03:07PM | 03/28/05
Member Since: 03/27/05
95 lifetime posts
I agree with the other guy, pictures might be very helpfull in diagnosing your leak {if you haven't fixed it by now}.

I used to use silicone to seal "things" but I've found that polyurethane works the best on a number of different surfaces. And...speculating here, but if you're just caulking on top of other previous caulkings/goops, it might not be sealing it very well in a permanent fashion.

But, there might be something else, or even several things, going on with the chimney causing it to leak, including how the flashings are tied-in with the shingles....which is why phots might really help.

quigley

03:48PM | 03/31/05
Member Since: 02/26/05
3 lifetime posts
Anyone know how I can attach pictures to a Post? Thanks.

dodgeroof

05:07PM | 03/31/05
Member Since: 03/27/05
95 lifetime posts
Not sure how/if they allow actual attacthments in this forum, but you could email them, if you like, to:

earl@dodgeroofing.com

or, if they're "located" on the web somewhere, copy and paste url to this board in another post.

One who enjoys helping with roof problems, for the fun of it.

k2

07:04PM | 03/31/05
Member Since: 06/06/03
1250 lifetime posts
Some folks had figured out how to include pics in the "old days" (before the BBS was re-done)--they used HTML tags. But I haven't seen anyone put any in for quite a while.

Best to put them on a web site and provide the URL; that is done quite frequently. Good luck.

Regards,

-k2 in CO

Moderator, Miscellaneous Forum

http://www.bobvila.com/BBS/Miscellaneous
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