
See where chimney leaks really start, part by part.
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Your technician shows you photos and prices the work in writing.
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Usually the pilot, thermocouple or ignition. See common causes.
Use the symptom finder →
Usually heat escaping through thin attic insulation.
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Home»Areas We Serve»Thornton, CO»Fireplace Repair
Thornton, CO · Fireplace Repair
Fireplace repair covers the firebox, smoke chamber, damper, gas valve and glass, so the fireplace burns safely and the smoke goes up the chimney.

The work
We repair cracked firebox panels and masonry, parge rough smoke chambers, fix or replace dampers, and service gas fireplaces, valves and pilot assemblies. Pellet stoves and inserts are serviced too.
If smoke comes into the room, we find out why before we fix anything. The cause is often the damper, the smoke chamber or the flue size, not the firebox.
See the full fireplace repair page for every detail of the work.
Why it matters here
The Front Range sees big temperature swings, strong high-altitude sun, heavy spring snow and some of the worst hail in the country.
Daily freeze and thaw opens cracks in the crown and mortar joints, and water that gets in freezes again overnight. Crowns and caps take the most damage.
Your A1 team
Our own technicians cover Thornton. Call the 24/7 line and we book the visit with the A1 team nearest you.
FAQ
Common causes are a closed or broken damper, a dirty or blocked flue, a rough smoke chamber, a flue too small for the fireplace, or a house that is short of air.
Yes. We repair gas valves, pilot assemblies, burners and glass, and check the venting.
Yes. Our own technicians do fireplace repair in Thornton and nearby towns across Colorado. Call the 24/7 line or book online.
Why A1
One nationwide team with our own technicians, local to you.
Findings, photos and a written price before any work starts.
Before-and-after photos of what we find and what we fix.
Leaks, smoke and storm damage: call day or night.
How it works
Online in a minute, or call the 24/7 line. We confirm your local A1 technician and a time window.
Your technician checks the chimney and the roof around it, and photographs what they find.
You get the findings, the photos and a written price. Nothing starts until you say yes.
Drop cloths down, debris hauled away, before-and-after photos sent to you.
Reviews
“A1 Chimney is different. They truly care about your chimney and want to see you get the best use out of it.
They relined my chimney and did a great job. The technician was respectful and left the work area clean.
Book online
Choose the service and a time that suits you. Your A1 technician confirms the visit, inspects, shows you photos and gives you a written price before any work starts.
Prefer to talk? Call (855) 8-CALL-A1 — we pick up 24/7.

Call the 24/7 line. Our team picks up day or night and sends a technician near you.