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Space Fireplace Services
Anatomy

Thimble

The pass-through fitting that carries a flue where it penetrates a wall.

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All glossary terms

What is Thimble?

UL-listed and made of refractory or metal, this sleeve carries a stove pipe safely through a combustible wall into the chimney. Sized or installed improperly, a thimble becomes a leading cause of wall fires.

Related terms:Pipe ConnectorClearances

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We work on thimble every week across DFW. CSIA-certified, written quotes, financing available.

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Other terms in the glossary

Creosote
Tar-like residue from incomplete wood combustion. Highly flammable.
NFPA 211
The US standard governing how chimneys, fireplaces, and vent systems are installed.
Inspection Levels
Level 1 covers the annual look; Level 2 is triggered by a sale or an event; Level 3 opens up concealed damage.
Flue
The inner passage that draws combustion gases up and out of the room.
Liner
The channel running inside the flue — clay tile, stainless steel, or cast-in-place.
Crown
The concrete cap at the very top of a masonry chimney.
10+
Years
NFPA 211
Compliant
CSIA
Certified
< 2hr
Response
Ready when you are

Talk to a CSIA-certified expert today.

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Licensed & Insured Same-Week Scheduling Written Quote, Always
Emergency

24/7 Response

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.

Emergency line
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