Sunday, June 29, 2014

Chimney Repairs Keep Fireplaces Burning Safely

Chimney Repairs Keep Fireplaces Burning Safely

By Elsa English


Human beings are the only living creatures who can control fire. Even in a digital world, a cozy fireplace is still inherently appealing, and usually becomes the focus of social gatherings. While a well-maintained hearth creates a pleasant atmosphere, poor upkeep can result in choking clouds of smoke, and in some cases ignoring needed chimney repairs leads to a house fire.

Newer homes are usually connected to natural gas, and many are not designed for wood burning fireplaces. Regardless, there must still be a safe and effective way to release the hot gases and residue from basement boilers or furnaces. In warmer regions, a fireplace may be used only occasionally during the winter, and maintenance becomes relatively easy to ignore.

The cost of procrastination can be high. Chimney fires cause a predictable number of losses each year, most caused by a steady buildup of creosote inside the vent itself. Creosote is the remaining chemical residue of the fire and smoke that high-moisture content wood produces. It can build up rapidly, and burns very quickly at astonishingly high temperatures.

The signs of that buildup are not always apparent. One indicator is consistently dark smoke exiting the top, or problems with lighter smoke back-flowing into a room even when the flue is opened properly. The only accurate way to gauge the volume and rate of deposit is to make an inspection more often. A thorough checkup takes a relatively short time, and need not be costly.

A do-it-yourself check is relatively straightforward, and does not exceed the capabilities of most homeowners. For maximum safety, choose a calm day to prevent blowing soot, and be sure to wear a face mask. It is important to look closely at the the fireplace side, as well as on the roof. A good flashlight will be necessary, and sometimes an angled mirror helps to peer into hidden corners.

If there is evidence of a rodent or bird nest blocking the exit, it will have to be removed. Even though this inconveniences the animals, a backup can result in excess carbon monoxide, and odorless gas that can be quickly fatal. The layers of creosote can be examined best using a screwdriver or long knife to cut through the deposit. If it is greater than 1/4 inch deep, do not use the fireplace until it is cleaned.

Creosote deposits are only one possible hazard. Cracking is also an issue, and can be caused by settling foundations or harsh weather conditions. Older chimneys may be made of brick, and deteriorating mortar can cause them to topple during a strong storm or mild earthquake. Flashing is usually installed between the roof and brick, and if it works loose, water can damage the surface underneath.

In damp climates, moss should not be allowed to grow on the surface, and if there is a cap above the flue it may need cleaning or replacing. Homeowners who notice any obvious problems should alert their regular maintenance service. If repairs are necessary, have them done before lighting the fireplace or wood stove. A professional inspection and repairs can save money in the long run, and might end up preventing a disaster.




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