Our Company Blog

Damper Stops

Gas fireplaces make a beautiful addition to any home and are an increasingly sought after feature for homebuyers. Valued for their beauty, functionality, and ease of use, more and more homeowners are converting their existing open hearth fireplaces to gas. However, what many may not realize is that their new gas fireplace is missing a required component – the damper stop.

Although many homeowners may not know what a damper stop is, they are a necessary part of a gas fireplace. Unfortunately, many homes with gas fireplaces – especially those that were not professionally installed – may be missing this important piece.

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What is a damper stop?

A damper stop is a piece of metal designed to ensure that the flue of a gas fireplace always remains partially open. With a traditional hearth fireplace, the damper  is opened or closed when the fireplace is in use.

While gas fireplaces also need the flue to be open while in use, there is often no mechanism to close it; instead, the damper is simply left partially or fully open when the gas insert is installed. However, leaving the damper open at installation does not ensure that the damper will stay open forever. Strong winds, house settling, or other damage to the flue or damper can cause the damper to close.

Because of this, damper stops were designed to be installed as a way to keep the damper permanently open. Although they are required, some homes with gas fireplaces – especially those that were self-installed by previous homeowners or untrained installers – may not have them.

Dangers of a missing damper stop

A damper stop may seem like an insignificant piece of the gas fireplace. However, it is a specially designed safety precaution that can help protect your family, namely against carbon monoxide poisoning.

Carbon monoxide is an odorless, tasteless, colorless gas that is often called the “silent killer” because it is so difficult to detect. When the damper is open, carbon monoxide is able to safely travel up the chimney and out of your home. However, if the damper is closed this deadly gas can back up into your room, affecting the health and safety of you, your family, and your friends.

How to identify a damper stop

With a traditional hearth fireplace, it is easy to tell if the damper is open or closed; if smoke back flows into a room when the fireplace is in use, the damper is closed. Gas fireplaces, however, do not produce smoke, making it much more difficult to tell if the damper is open or closed.

Missing damper stops are most frequently identified during home inspections; however, they can be easily missed, leading homeowners to believe that there is nothing wrong with their gas insert or fireplace.

To make sure that your gas fireplace has a damper stop that is correctly installed, contact Lord’s Chimney to schedule a chimney inspection. Our trained chimney sweeps will be able to inspect your chimney and fireplace to determine whether or not your gas fireplace has a damper stop; if it is missing, one can be installed. To make sure your chimney is up to current safety standards, contact us today!