Chimney Liners Explained: Clay vs. Stainless Steel

A chimney liner protects your masonry and home from heat and corrosive gases. Clay tile is traditional and common in older homes; stainless steel is durable and used for relining. A cracked or missing liner is a fire and carbon monoxide hazard.

What a liner does

The liner contains the flue, shielding the surrounding brick and framing from heat and acidic combustion byproducts, and helping the chimney draft correctly.

Clay vs stainless

Clay tile is durable and low-cost but cracks under thermal shock and is hard to repair in sections. Stainless steel resists corrosion, suits relining and appliance changes, and usually carries a long warranty.

When to reline

Reline when the liner is cracked, deteriorated, or missing, after a chimney fire, or when switching heating appliances. A camera inspection confirms the liner's condition.

Frequently Asked Questions

How do I know my liner is bad?

A camera inspection reveals cracks and gaps not visible from below.

Is stainless better than clay?

For relining and durability, stainless is common; clay is fine when intact.

Is a damaged liner urgent?

Yes, due to fire and carbon monoxide risk.

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