CCS Chimney Cap & Crown Systems Flashcards

What is a chimney chase cover and where is it used?

Answer: A metal cover placed on top of a prefabricated or framed chase to protect it from water

A chase cover is a metal pan-style cover fitted over the top of a factory-built or wood-framed chase to prevent water from entering the chase enclosure.

What is the most common problem found with galvanized steel chase covers?

Answer: They rust through and allow water infiltration into the chase

Galvanized chase covers corrode over time, rusting through and allowing water to pour into the chase, which can damage the firebox and framing.

Which metal is considered the premium choice for chase covers due to its lifespan and self-patinating finish?

Answer: Copper

Copper is considered the premium chase cover material because it is virtually maintenance-free, develops a protective patina, and can last the lifetime of the structure.

When inspecting a chase cover, what installation detail ensures water does not pool and leak inward?

Answer: The cover must have a positive slope or be crowned to shed water toward the edges

A properly installed chase cover must be sloped or crowned so water drains to the edges rather than pooling in the center, which causes rust and leakage.

What is the recommended minimum overhang of a chase cover beyond the chase sides?

Answer: At least 2 inches

Chase covers should overhang the chase sides by at least 2 inches to direct runoff clear of the chase walls and prevent water wicking into the framing.

Which chimney cap style is designed specifically for top-sealing the damper opening rather than just covering the flue tile?

Answer: Top-mount damper cap

A top-mount damper cap replaces the traditional throat damper and seals at the very top of the chimney, providing both a cap and an energy-efficient airtight seal.