Chimney liner repair in Denver, CO
We repair and replace chimney flue liners, and explain which option suits the appliance connected to that flue. In Denver that means housing with a median build year of 1974, in a place the nearest NOAA station puts at 6,068 heating degree days a year.
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A liner proposal should identify the existing system, show the defect, and explain why the proposed repair or replacement fits the connected appliance. Avoid choosing a liner from price or diameter alone.
Denver homes and their flues
Public figures for Denver as a whole. They describe local housing and heating, not your home, so the visit still starts with your own chimney.
- Median year built
- 1974
- Half of Denver's housing units were built in 1974 or earlier, so the median Denver chimney had about 49 years behind it by the 2023 end of the estimates. Fort Collins, also in Colorado, records 1992, 18 years newer. A liner fitted around 1974 was sized for the appliance of 1974; what matters now is whether it suits the one connected today.
- Source: U.S. Census Bureau, ACS 5-Year Estimates 2019-2023, table B25035, retrieved 2026-09-15
- Homes heated mainly with utility gas
- 61.5%
- 61.5% of occupied Denver homes heat primarily with utility gas, so about 38.5% run on oil, electricity, propane or something else. Wood is the primary heat in under 0.1% of them. A liner has to suit the appliance it vents, and in Denver that is a gas appliance about 61.5% of the time.
- Source: U.S. Census Bureau, ACS 5-Year Estimates 2019-2023, table B25040, retrieved 2026-09-15
- Homes heated mainly with wood
- Under 0.1%
- under 0.1% of occupied Denver homes heat primarily with wood, against 61.5% on utility gas. Fort Collins, also in Colorado, records 0.4%. At under 0.1%, almost no Denver home depends on wood for heat, so most fires here are occasional — which still leaves deposits, and leaves the flue idle long enough for debris and nests to collect.
- Source: U.S. Census Bureau, ACS 5-Year Estimates 2019-2023, table B25040, retrieved 2026-09-15
- Heating degree days a year
- 6,068
- The NOAA climate-normals station nearest Denver averages 6,068 heating degree days a year. Colorado Springs, also in Colorado, records 6,292, about 4% more. Degree days measure heating demand, not freeze-thaw cycles, so 6,068 says roughly how long a Denver flue is in use across a year, not how much the masonry around it moves. Book before the season rather than during it.
- Source: NOAA National Centers for Environmental Information, U.S. Climate Normals 1991-2020 (annual/seasonal), retrieved 2026-09-15
What liner work covers
Included
- Confirming which flue has the problem and which appliance it serves
- Locating the defect inside the flue, with a camera where needed
- Explaining whether a repair or a replacement suits that liner
- The agreed repair or relining, sized for the connected appliance
Prices and estimates
Prices are not listed here: an estimate depends on what the visit finds.
Before and after the visit
Before the visit
- If a report says to stop using the appliance on that flue, keep it off until the repair.
- Share the earlier report and any photos that show the defect.
- Find the appliance manual or a model label you can see without opening panels.
Afterwards, keep
- The flue and appliance the work applies to
- The liner material and size
- Any limits on use until other work is done
The visit step by step, what moves the estimate, what this service leaves out, and more common questions:
Chimney liner repair in ColoradoQuestions about liners
General answers. The findings at your home come first.
Should I stop using the appliance on that flue?
If a report or the findings say the liner is damaged, keep the appliance on that flue off until it is repaired: a damaged liner can let heat or combustion gases reach parts of the house they should not. If a carbon monoxide alarm sounds, leave and call 911.Source: U.S. Consumer Product Safety Commission, Carbon Monoxide Fact Sheet
Chimney liner repair elsewhere in Colorado
Aurora, about 9 miles from Denver, Fort Collins, about 55 miles from Denver, and Colorado Springs, about 62 miles from Denver. Whether we can schedule work at your address is confirmed after we review your request.
Where to go next
Request an estimate
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A request does not confirm an appointment.
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