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Anatomy

Liner

The inner channel of the flue, whether clay tile, stainless steel, or cast-in-place.

All glossary terms

What is Liner?

Lining material on the interior of the chimney flue. Modern code requires it be UL-listed, typically 316Ti or 316L stainless steel, to contain heat and gases. Cracked or missing, it is both a fire hazard and a code violation; relining is the standard fix.

Related terms:FlueStainless Steel Liner

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Active leak, animal in flue, post-fire damage, or smoke event? Real humans on the line 7 AM to 12 AM every day — replies in under 2 minutes. Tech dispatch within 2 hours during business hours, subject to crew availability after-hours.

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