Recurring exposure to moisture severely compromises a chimney's performance ­ and its structural integrity. Hidden damage from moisture can cause chimneys to crack, seep, and even fall down altogether, especially after a major event such as an earthquake.

There are ways to avoid moisture-related damage, however.

First, find all the places near your fireplace where moisture likes to "hang-out."

• Clear leaves from gutters on a regular basis, and repair any gutters that are broken. Examine your downspout locations in relation to the chimney.  Downspout terminations that are uphill of the chimney, or that drain at the chimney base, pose risks and should therefore be diverted.
• Prune trees that hang over or near your chimney. Rain and dew that collects on trees is a frequent cause of masonry deterioration.
• Check for poor drainage ­ and address this problem as soon as possible.
• Repair any leaks in the flashing (or seal) between your roofing material and the chimney.
• Make sure sprinklers are watering plants -not your chimney. Change the sprinkler head or your watering pattern as appropriate.

Next, consider asking The Irish Sweep to waterproof your chimney. Or, have a flue cap installed, or a new wash crown constructed, to prevent water from collecting in your firebox

Last, check for cracks in your chimney, deteriorated mortar joints, and weakened masonry. If you find any of the above, call the Irish Sweep for an evaluation.