Part 4: Why is My Chimney Chase Cover Leaking?
July 19, 2023
The purpose of a chimney chase cover is to prevent water from entering the chimney. A properly fabricated chimney chase cover should never pool water on the top of the pan. Pooling water on the top of the chase will cause inferior steel to rust more quickly. The cover should always shed water off the chimney. Water can sit on top of the chimney cover for days if the temperature is low and with no wind, which expedites the corrosion process.
This first example shows that the chimney cover is attached to the top of the chimney through the top of the chimney cover. You can see a clear line on the cover that is sending water directly to the nail head. When you drive a nail down through the top of the cover, that becomes the low spot on the cover. We all know water will travel downhill and in the path of least resistance. What happens over time is that the top of the chimney expands and contracts with the heat cycles and use of the fireplace in winter. This will cause the nail to pop out, creating a hole in the top of the chimney. If your chimney cover has nails going through the top of the cover, it should be replaced immediately. Fasteners should always go through the side skirt of the chimney cover.
To cap this segment, if you see water pooling on the chimney cover, the general rule of thumb is to replace it right away.
Article Series: Why Is My Chimney Leaking?
Click here to move on to Part One of the "Why Is My Chimney Leaking" Series! If this article did not solve your issue, we have more troubleshooting articles for you to review.
Here are a few helpful links for the chase covers:
Back in July you gave me excellent advice re. sizing/purchasing a flue liner for the chimney associated with my wood stove. I'd like to thank you once agai... More
A few weeks ago I ordered a chimney liner system for my fireplace insert. Your salesman recommended the liner system plus the insulating blanket. I just wa... More
Just got around to installing my new smooth flexible liner and deluxe terra cotta cap (wow). The quality of your product is second to none. Very pleased an... More
Thanks so much for the great tech service from Dennis, very knowledgable, friendly and proffessional.Your website is the best, beats your competition by fa... More
Sue and Dennis, I received the final part of my order yesterday (the chimney cap that actually fits over the chimney chase). It looks wonderful! My fiancé... More