Chimney Problem: Critters in the Creosote

If you have blowing wind, dripping rain, and nesting animals in your flue, you probably need a chimney cap. They cost as little as $30 and are easy to install (caps typically come with installation instructions). They keep the elements (and wildlife) out of your chimney, while keeping sparks from flying onto the roof.

Chimney problems can be dangerous and even deadly. Thankfully, cleaning and repairs are relatively straightforward. After a professional inspection, consider cleaning the flue, replacing the crown or adding a cap.

Source: http://www.networx.com/article/common-chimney-problems-and-fixes