Chimneys are for channeling smoke and toxic gasses from your furnace, woodstove or fireplace. Although chimneys are built to last for decades they still suffer from environment stress due to the natural elements. When a chimney has cracks in the outside or inside walls you can have serious problems. Mortar joints between the bricks are likely to flake, wash out or crack after 20 or 25 years of exposure to the elements of nature.

The continuous cycle of freeze and thaw action of winter climates is usually the cause of chimney degradation and the need for periodic chimney repairs. Moisture makes its way into the masonry between the bricks eventually causing damage. In addition, any attachments to the chimney that are metal such as lightning rods or television antennas can induce chimney damage.

The risk of having a damaged chimney increases in old historic homes before natural gas or oil for heat became common. Coal was used which is very acidic. In those older homes the chimneys were built larger to accommodate the high heat of burning coal that today’s powered boilers are oversized and operate too cool for oil or natural gas boilers. These old chimneys can lead to greater risk of condensation and resulting damage. The uppermost areas of the interior walls of the chimney are the most vulnerable. They are the most difficult to notice unless you spend time on the roof. Unfortunately, neglect and lack of inspection often lead to the need for major repairs.

Your home's location can also increase the chimney's risk of damage. A chimney that was built fifty years ago are susceptible to earthquake damage because they were built rigid and as a result they don't move with a quake as modern chimneys do. Damaged chimneys can also allow toxic gases such as carbon monoxide to leak into your house, creating a serious health hazard.

You should always check the chimney at least every one or two years for damage. Check the chimney area for missing or loose flashing and any signs of damage to the masonry, especially cracking. Any serious problems should be repaired by a professional mason. A chimney can last for decades if it is well maintained. Minor cracks in the masonry should be repaired before they become bigger problems. Loose cement should be removed and the area repaired. If the cap on the chimney is seriously damaged it should be replaced.

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