Learn when to go about repairing chase covers. Learn how repairing chase covers can save you money. This video shows the importance of a chase covers and the symptoms of old chase covers. Side effects can entail rotted trim work, siding, vent work, mold growth, along with leaking the inside of the firebox. The most common chase covers are made of galvanized metal, as opposed to stronger stainless steel which is what we recommend. Long term a new chase cover can save thousands of dollars in future repairs.