Stainless Steel Chase Covers

Replace a Rusted or Failing Chase Cover

Factory-built chimney systems are often enclosed inside a framed chase with a metal cover at the top. Older galvanized chase covers can rust, hold water or deteriorate around seams and openings. Once the cover begins to fail, moisture can enter the chase and affect materials and components below.

AirPlease Missouri Chimney Services installs custom stainless steel chase covers sized for the existing chimney chase.

Signs a Chase Cover May Need Replacement

• Visible rust or corrosion.
• Rust staining running down the chase.
• Standing water on the existing cover.
• Open seams, holes or deteriorated metal.
• Water intrusion around the chimney chase.
• A cover that is flat, undersized or poorly fitted.

Why Galvanized Covers Fail

Many original chase covers are made from galvanized sheet metal. Once protective coatings wear down or water repeatedly sits on the surface, corrosion can begin and eventually create holes or failed seams.

Rust Stains Are an Early Warning

Brown streaks down siding or chase surfaces can indicate corrosion above. The visible stain may appear before a hole becomes obvious from the ground, so the top surface should be evaluated when rust staining is present.

Custom Stainless Steel Replacement

The existing chase is measured so the replacement cover can be fabricated to fit the structure and termination configuration. The old cover is removed as required, and the new stainless steel cover is installed as part of the approved scope.

A properly fabricated chase cover is shaped and fitted to help direct water away from the chase rather than allowing it to sit on the surface.

Why Stainless Steel?

Stainless steel offers substantially better corrosion resistance than common galvanized steel and is well suited for long-term exterior exposure. For that reason, AirPlease Missouri Chimney Services recommends stainless steel for custom replacement chase covers.

Custom Fabrication

The chase is measured so the new cover fits the actual structure and termination openings. Custom fabrication allows the overhang, penetrations and overall dimensions to match the existing chase.

Slope, Overhang and Drip Edge

A properly fabricated cover should help move water away from the chase walls and avoid broad low areas where water can pond.

Why Chase Covers Need Positive Drainage

A chase cover should move water away rather than acting like a shallow pan. Proper fabrication considers slope, edge details, seams, and penetrations so rain is directed away from the framed chase.

Termination Openings

Chimney pipe and other components pass through the chase cover. Those locations must be measured carefully so the replacement fits the existing termination system.

Storm Collars and Penetrations

The chimney pipe passes through the chase cover, and water protection at that penetration depends on the complete termination assembly. A new cover should be coordinated with the existing pipe, collar, and termination components.

Schedule a Chase Cover Evaluation

If your chase cover is rusted, leaking or deteriorated, AirPlease Missouri Chimney Services can measure the existing chase and provide a custom stainless steel replacement option.

Replace a Failing Chase Cover Before Corrosion Gets Worse

A rusted chase cover can continue deteriorating until seams, low areas, or penetrations allow water into the framed chase. A properly measured stainless steel replacement is fabricated around the actual chase and termination openings with drainage and edge details designed for exterior exposure.