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The answer can vary widely based on a home's age and design. As with any type of remodeling project, assume that every structure is load-bearing until confirming otherwise with a structural engineer. Almost all modern homes have chimneys that are fully independent from the rest of the home's framing. As a result, they don't bear any load beyond their own weight. However, many historic homes built prior to the 1900s contain load-bearing chimneys that tie into the surrounding roof and floor joists. If possible, use a home's blueprints or look for chimney connections that indicate load-bearing qualities to get your answer.

A quality pellet stove that receives proper maintenance can last between 15 and 20 years, while most will last at least 10 years. The exact lifespan depends on factors like frequency of use and how well the stove is cared for. Proper maintenance—such as periodically cleaning the vents, vacuuming the ash pan, and refreshing the pellets as needed—can significantly extend its life, making it a worthwhile long-term investment.

If you have a chimney, you need a flue or chimney cap. The right covering keeps rain, debris, and animals from getting into your flue or chimney and causing damage. A flue or chimney cap also provides fire protection. The mesh insert around the cap keeps sparks from flying out of the chimney and igniting leaves and other materials.

In addition to flashing, a roof cricket can help divert water around your chimney so that it drains properly off your roof. It’s shaped like a double triangle and is installed behind the chimney so that falling water spills evenly down each side. This helps prevent water from accumulating behind your chimney, which can increase water damage and the risk of leaks. 

The International Building Code (IBC) requires cricket installation if a chimney built after 2012 measures over 30 inches in width. Chimneys constructed before that date are typically grandfathered in and aren’t required to have crickets installed.