Chimney leaks

Old 07-06-12, 01:21 PM
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Chimney leaks

Would really appreciate some help.

I have been getting leaks around my chimney coming from the sides of the brick work inside the attick. The leaks are occuring at the front and rear chimneys. The roof was replaced last year and new lead code 4 flashings added last month, but still getting the same leaks. The flaunch has also been recemented. Any suggestions grateful
Old 07-06-12, 10:03 PM
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Yikes. Have you gone up there and inspected the flashing. Other than a pointing job on the chimneys I'd say the only chance is that the roof guy screwed up. What is the slope of the roof when it passes the chimneys, you can't use certain roofing materials if the pitch is to low.

Was the old roof ripped off, or was the new roof installed on top of the old?
Old 07-07-12, 05:44 AM
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If water is coming down the face of the chimney breast in the attic space, it is unlikely to be the flaunching or the pointing of the exposed brickwork.
The most likely problem is the lead flashing. It takes skill to form this properly and many roofers are not up to it. You really need to have it done again properly by a skilled roofer or plumber.
Old 07-09-12, 03:15 PM
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the best time to flash the chimney is as the roof is installed not after. What kind of flashing did the original roof replacement consist of? How did the subsequent lead flashing get anchored to the brick chimney? (did they cut the masonry or mortar joint and set the lead flashing into the joint or did they simply surface mount the flashing) Ideally you would install surface mounted step flashing as the shingle roof is going in (assuming the roof is shingled) and then install a counter-flashings that is set into the chimney, secured with lead rope wedges and caulked. The counter-flashing would then drop down over the top of the step flashing to avoid any issues with the joints opening up where the step flashing meets the masonry. Google step flashing a chimney and you should find a bunch of good pictures.

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