How to Fix a Leak Around a Chimney

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To fix a leak around a chimney, you need to know where the leak is coming from. A proper diagnosis of the problem can help you make the most sensible and least expensive decision about how to fix it. Chimney leaks can be caused by a variety of different reasons. In cases where the roofing is flawed, it may only appear that the leak is coming from the chimney. Water is persistent and can travel laterally from the point of leakage before it appears inside your home.

Things You'll Need

  • Ladder
  • Flashlight
  • Flat head screwdriver
  • Roofing tar
  • Shingles
  • Roofing nails
  • Hammer
  • Inspect the chimney thoroughly to find places where water may be entering. Look for cracks in the chimney cap, in the mortar between bricks, missing mortar or bricks, loose flashing around the base of the chimney and damaged shingles in the area of the chimney. Look down the flue with a flashlight to check the condition of the chimney liner.

  • Pry off the flashing, if you determine it is the problem, with a flat head screwdriver. The top edge of chimney flashing is set into the mortar between bricks so be careful not to damage any bricks when doing this.

  • Apply roofing tar to the joint between the bricks where the chimney flashing was then reinsert the chimney flashing into the joint.

  • Apply roofing tar to the joint between the flashing and the chimney bricks all the way around the chimney.

  • Replace the shingles in the vicinity of the chimney if they are deteriorating or showing signs of water damage.

References

  • Photo Credit Photos.com/Photos.com/Getty Images
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