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Regular professional chimney cleaning and a well-fitting chimney cap are two of the most effective measures to help prevent flue blockages. Annual cleaning keeps the flue from developing a thick layer of creosote. The chimney cap keeps debris out and stops critters from going down your flue for shelter while carrying clog-worthy nesting material.

Yes, you need to leave your chimney damper open when burning a creosote log so that smoke and other debris doesn’t waft into your house as it’s burning. You’ll need to make sure your damper is fully open, even when the log continues to smoke, until it’s completely out and cold.

You should schedule a fireplace inspection at least once a year, per the National Fire Protection Association (NFPA). However, this is the minimum requirement even if you’re diligent with fireplace maintenance between uses. If you suspect your fireplace is malfunctioning, schedule one sooner to avoid fire hazards or the release of harmful emissions like carbon monoxide in your home.

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.