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Chimney crowns should be at least 2 inches thick at their thinnest point. If the crown is thinner than 2 inches, it’s more likely to be damaged and allow water to seep into the chimney.

Yes, it is possible to convert a wood-burning fireplace to gas. The average cost for this conversion is $3,000, with a typical range of $500 to $5,500. The project involves running a gas line, professionally cleaning the chimney, and installing gas logs.

Cost factors include the type of gas fireplace and whether a new gas line is needed. Installing a natural gas line can add $200 to $1,000 to the cost. Vented gas fireplaces are more expensive, averaging around $5,000, while ventless options are more cost-effective at about $1,500.

While you have some flexibility in the types of wood you can use in your outdoor furnace, it's important to make wise choices for optimal performance and efficiency. Hardwoods, such as oak, maple, and cherry, are generally recommended for their higher energy content and cleaner burn. These hardwoods produce more heat per volume and tend to produce fewer creosote deposits, which can accumulate and cause a chimney fire, according to the U.S. Environmental Protection Agency.

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.