Fireplaces are Built as Rain Proof

Fireplace chimneys are also built with a design that blocks as much moisture from entering the fireplace as possible. So, you may have a downpour outside, but a fireplace and chimney that's in high working order should prevent little to no moisture from reaching the bottom of the pit.

Can rain get in my chimney?

One of the most common reasons for rain to leak into a chimney is physical damage or wear and tear to the chimney. The portion of your chimney that extends outside of your home faces near constant exposure to the elements, including rain, snow, high wind, and sun exposure.

How does rain not get in chimney?

How Do Chimneys Keep Rain Out? The most important part of a chimney that keeps rain out is the chimney cap. Chimney caps are a cover for the top of the chimney that usually has a slight slant. This slant allows rain to slide away from the chimney.