What does a stainless steel chase cover replacement cost for a prefab chimney on my Ottawa home?

A stainless steel chase cover replacement for a prefab chimney in Ottawa typically costs $400 to $900 installed, depending on the size of your chase and the complexity of the installation. Most Ottawa homes with prefab fireplaces have chase covers ranging from 24" x 24" up to 48" x 60", with the larger sizes pushing costs toward the higher end of that range.

The chase cover is the metal cap that sits on top of your prefab chimney's wooden chase structure, and it's absolutely critical in Ottawa's brutal freeze-thaw climate. Unlike masonry chimneys that have concrete crowns, prefab chimneys rely entirely on the chase cover to keep water out of the wooden chase box. When these covers fail — which they inevitably do after 15 to 25 years of Ottawa winters — water infiltration can rot the wooden chase structure, damage the metal chimney pipe inside, and even leak into your home's interior walls.

The replacement process involves safely accessing your roof, removing the old deteriorated cover (often rusted galvanized steel), measuring the chase opening precisely, and installing a new stainless steel cover with proper overhang and drip edges. Quality stainless steel chase covers are fabricated from 24-gauge 316-grade stainless steel, which resists corrosion far better than the galvanized steel covers that were standard on prefab chimneys built in the 1980s and 1990s. The new cover should include a spark arrestor screen and proper flashing details where it meets the chase walls.

This is definitely professional work — it requires safe roof access, precise measurements, and proper sealing techniques to prevent future water infiltration. A botched chase cover installation can cause thousands of dollars in water damage to your home's structure. Most Ottawa roofers and chimney contractors can handle chase cover replacement, and the work is typically completed in half a day once the custom cover is fabricated.

If you need a chase cover replacement, you can browse experienced chimney and roofing contractors through the Ottawa Construction Network directory to compare local professionals who understand the specific challenges of prefab chimney maintenance in our climate.