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Yes, if your gas fireplace has a flue, you typically need to open it when using the fireplace. Although gas fireplaces don’t produce the type of smoke and soot that wood-burning ones do, they still release combustion gasses like carbon monoxide. Opening the flue ensures these gasses safely exit your home through the chimney. Not all gas fireplaces need a chimney, however. Always check the manufacturer’s instructions for your specific gas fireplace model, as some newer models may have different ventilation requirements.

A chimney cleaning brick or log can help loosen creosote between professional chimney cleaning appointments. Although they can help keep your chimney cleaner, they are not a substitute for chimney sweeping and are not meant to be used regularly.

The best time to clean your chimney is before you need to use it, which for most people is during the spring, summer, or early fall. Spring and summer are often ideal because the chimney is not in use, and chimney sweeps can access the roof more easily without snow and ice. The warmer months are also better for making any necessary repairs. To avoid the rush when chimney sweeps get booked up in early spring and late fall, scheduling your cleaning for the summer can be a safe bet. It's recommended to book your annual chimney sweep during these warmer months to maintain a yearly schedule.

Chimney crowns may be stone, concrete, or metal but most crowns are made of concrete. It’s not recommended to build chimney crowns with mortar (which is different from concrete) due to it’s weaker composition (especially when exposed to the outside elements). Most chimney crowns are custom made to fit your home’s specific chimney.