Every Lakewood chimney sweep must check for carbon monoxide leaks, since clogged or cracked flues can release invisible, deadly gas without warning. The Chimney Safety Institute of America (CSIA) reports that poorly vented fireplaces and stoves account for 40% of home CO poisoning incidents. In Lakewood’s dry, high-altitude climate, poor draft conditions can force CO back into living spaces. A certified sweep uses portable monitors and close inspections to spot risks before they become life-threatening. Don’t assume your fireplace is safe just because it looks fine.
What is carbon monoxide (CO) testing in a chimney?
Carbon monoxide testing in a chimney means checking for dangerous gas buildup caused by incomplete combustion. When wood or gas burns poorly, due to clogged flues, cracked liners, or poor draft. CO leaks into your home instead of venting outside. In Lakewood, where older homes with masonry chimneys are common, this risk is higher because draft issues worsen at high altitudes. A certified chimney sweep uses a handheld CO detector to measure levels during a sweep. If readings exceed safe limits (typically above 10 parts per million), they’ll pinpoint the source, often a blocked chimney, damaged liner, or improperly installed appliance. The EPA’s Burn Wise program the EPA's Burn Wise program notes that CO poisoning from fireplaces sends 150 people to the ER yearly, and many cases go unreported. In Lakewood’s dry climate, creosote buildup accelerates these risks, so testing isn’t optional, it’s a lifesaver.
Why Lakewood homes need CO testing during chimney sweeps
Lakewood’s unique mix of older homes, high altitude, and dry winters creates perfect conditions for CO leaks. Here’s why your chimney sweep must test for it: 1. Altitude affects draft: Lakewood sits at 5,430 feet, where thinner air reduces chimney draw. A sweep checks if your flue is pulling properly or if CO is backing up. 2. Older masonry chimneys: Many Lakewood homes have unlined brick chimneys, which crack over time. These gaps let CO seep into living spaces. 3. Creosote buildup: Lakewood’s dry air dries creosote faster, clogging flues and forcing CO into your home. A sweep removes this and tests for leaks. 4. Gas appliances: Even if you don’t use your fireplace, a gas furnace or water heater sharing the chimney can leak CO if the flue is damaged. The CSIA the Chimney Safety Institute of America (CSIA)|https://www.csia.org/)) recommends CO testing during every inspection, especially in areas like Lakewood where homes often mix wood and gas appliances. Skipping this step is like ignoring a silent killer, you won’t smell or see it until it’s too late.
How a Lakewood chimney sweep detects CO leaks (step-by-step)
A professional chimney sweep doesn’t just clean your flue, they perform a multi-step safety check to catch CO risks. Here’s what happens during your appointment: 1. Visual inspection: They check for cracks in the chimney crown, liner gaps, or rusted damper seals, common in Lakewood’s freeze-thaw cycles. 2. Draft test: Using a smoke puff or anemometer, they confirm your chimney is pulling air upward. Weak draft = CO risk. 3. CO monitoring: A handheld detector measures gas levels at the flue opening and inside your home. Levels above 35 ppm require immediate action. 4. Appliance check: If you have a gas fireplace or furnace, they test for proper venting and seal leaks around connections. 5. Creosote removal: Built-up creosote (common in Lakewood’s dry winters) can block airflow, forcing CO into your home. A sweep removes it and checks for soot patterns that signal poor combustion. In Lakewood, where many homes use both wood and gas, this full check is non-negotiable. Contact us for a sweep that includes CO testing, it’s the only way to know for sure if your chimney is safe.
Signs your Lakewood chimney might be leaking CO (don’t ignore these)
CO is odorless and colorless, but these warning signs mean your chimney could be leaking it: - Flickering or yellow flames: A gas fireplace with yellow flames instead of blue burns inefficiently, releasing CO. - Soot on walls or ceilings: Black streaks near the fireplace mean incomplete combustion and potential CO buildup. - Headaches or dizziness: Mild CO poisoning causes flu-like symptoms, especially after using the fireplace. - Stale or smoky air: If your home feels stuffy or smells like gas even when the fireplace is off, CO may be trapped. - Condensation on windows near the fireplace: Excess moisture from poor combustion can signal CO risks. Lakewood’s high altitude makes these symptoms harder to notice. If you experience any of these, schedule a chimney inspection immediately. The NFPA the National Fire Protection Association (NFPA)|https://www.nfpa.org/)) reports that 40% of CO poisoning cases happen in homes with undetected chimney issues. Don’t wait for a carbon monoxide detector to alarm, get it checked now.
What to do if your Lakewood chimney fails CO testing
If your chimney sweep finds CO leaks, they’ll outline repairs and next steps. Here’s what to expect: 1. Immediate fixes: Small issues like a cracked damper or minor creosote buildup can often be resolved on the spot. 2. Liner replacement: If your chimney liner is damaged (common in older Lakewood homes), a new stainless-steel liner may be needed to prevent future leaks. Learn about chimney liner costs. 3. Appliance adjustments: Gas fireplaces or furnaces may need relighting or venting repairs. 4. Carbon monoxide detector installation: If your home lacks detectors, install one near bedrooms and living areas. The U.S. Environmental Protection Agency the U.S. Environmental Protection Agency recommends testing detectors monthly. 5. Follow-up inspection: After repairs, schedule a second sweep to confirm the issue is resolved. In Lakewood’s climate, we recommend this before winter. Never ignore a failed CO test. Even minor leaks can be deadly in a sealed home. Ask about our safety-first warranties for peace of mind.
How often should you test for CO in your Lakewood chimney?
The CSIA the Chimney Safety Institute of America (CSIA)|https://www.csia.org/)) recommends CO testing during these key times: - Annually: Before winter, when fireplaces are used most. - After repairs: If your chimney or appliance has been serviced. - If you smell gas: Even a faint odor near the fireplace warrants testing. - When moving into a new home: Older Lakewood homes often hide chimney issues. See our move-in checklist. Lakewood’s dry winters and high altitude increase risks, so don’t wait for symptoms. A sweep with CO testing costs no more than a standard cleaning but could save your life. Book your appointment today, we include CO checks in every inspection.
| Service | Typical Cost Range | When Needed |
|---|---|---|
| CO Testing During Sweep | $99–$149 | Annually, or after repairs or symptoms |
| Damper Seal Repair | $150–$250 | If cracked or rusted |
| Chimney Liner Replacement | $1,200–$3,500 | For cracked or missing liners |
| Gas Appliance Venting Check | $120–$200 | If using gas fireplace or furnace |
| Emergency CO Leak Repair | $200–$500+ | For active leaks or high readings |
Frequently Asked Questions
My chimney passed inspection last year, but I still smell gas near the fireplace. Should I be worried?
Yes, this is a red flag. Even if your chimney passed, gas odors mean CO could be leaking. Lakewood’s high altitude can mask draft issues, so schedule an emergency CO test. A blocked flue or cracked liner might not show up in a standard inspection but can still release deadly gas. Contact us immediately, we’ll check for leaks and fix the problem before it’s dangerous.
I only use my gas fireplace in Lakewood’s cold months. Do I still need CO testing?
Absolutely. Gas fireplaces can leak CO even when unused, especially if the chimney is shared with a furnace or water heater. Lakewood’s older homes often have unlined chimneys that crack over time, letting CO seep in. The EPA the U.S. Environmental Protection Agency warns that gas appliances cause 60% of CO poisoning cases. Test before winter starts, it’s the only way to be sure.
My carbon monoxide detector went off after lighting the fireplace. What should I do?
Turn off the fireplace immediately, open windows, and leave the home until the detector resets. Then call a chimney sweep to test for leaks. In Lakewood, this often means a blocked flue or damaged liner. Never ignore an alarm. CO poisoning can be fatal within hours. We offer emergency CO testing to identify and fix the issue fast.
Does Lakewood’s high altitude affect how often I need CO testing?
Yes. Thinner air at 5,430 feet reduces chimney draft, making CO leaks more likely. The CSIA the Chimney Safety Institute of America (CSIA)|https://www.csia.org/)) recommends testing twice a year in high-altitude areas like Lakewood, once before winter and again after spring storms, which can damage chimneys. If you notice slow-burning flames or soot buildup, test sooner. Our crew is trained for Lakewood’s unique conditions, we’ll catch problems before they become dangerous.