Radon, Remodeling, and Respiratory Risk in Denver Homes
By Franklin Everett ShawImagine breathing in something invisible, odorless, and tasteless that slowly damages your lungs. That’s radon, a radioactive gas seeping from the ground, and it’s a significant concern for Denver homeowners, especially those planning renovations. Ignoring it is like playing Russian roulette with your respiratory health.
Radon is a naturally occurring gas produced by the decay of uranium in soil, rock, and water. It’s not a Denver-specific problem, but the Front Range’s geology makes it particularly prevalent.
Before you even think about knocking down walls or laying new flooring, you must test for radon. This isn’t just a suggestion; it’s a crucial step in protecting your family’s health.
The EPA recommends that all homes be tested for radon, and mitigation is recommended if levels are at or above 4 picocuries per liter (pCi/L). Colorado regulations mirror these guidelines.
There are two primary ways to test: DIY kits and professional testing services. DIY kits are readily available at hardware stores like Home Depot and Lowe’s in Denver, as well as online retailers.
These kits typically involve placing a passive detector in the lowest lived-in level of your home for a specified period (usually 2-7 days). You then mail the detector to a lab for analysis.
The cost of a DIY kit ranges from $20 to $50, including lab fees. It’s a relatively inexpensive way to get an initial reading.
However, DIY kits have limitations. They can be easily tampered with, and the results may not be as accurate as professional testing.
Professional radon testing services in Denver, like those offered by companies such as Radon Detection and Control or AccuStar Labs, use more sophisticated equipment and follow strict protocols.
They can provide more accurate and reliable results, especially in complex situations or when you suspect high radon levels. Professional testing typically costs between $150 and $300.
During renovations, testing becomes even more critical. Disturbing the soil around your foundation can release trapped radon gas, potentially increasing indoor levels.
If you’re planning a basement remodel, for example, test before you start any work. This will give you a baseline reading and allow you to plan for mitigation if necessary.
After the renovation is complete, test again to ensure that the work hasn’t inadvertently increased radon levels. This is especially important if you’ve added new living space in the basement.
Older homes in Denver, particularly those built before the 1980s, are more likely to have elevated radon levels. This is because building codes at the time didn’t address radon mitigation.
Newer homes, built after the implementation of stricter building codes, often include radon-resistant construction features. These features may include:
- A vapor barrier under the concrete slab.
- A passive sub-slab depressurization system (a pipe running from under the slab to the roof).
- Sealing of cracks and openings in the foundation.
Even with these features, it’s still essential to test for radon in new construction. Radon-resistant construction only reduces the risk; it doesn’t eliminate it entirely.
If your radon test results come back above 4 pCi/L, mitigation is necessary. Radon mitigation systems typically involve installing a vent pipe and fan to draw radon gas from under the foundation and vent it safely outside.
The cost of radon mitigation in Denver can range from $800 to $3,000, depending on the size and complexity of your home. The average cost is around $1,500.
Several factors can affect the cost of mitigation, including:
- The size of your home.
- The type of foundation (slab-on-grade, basement, crawl space).
- The accessibility of the foundation.
- The complexity of the venting system.
Don’t try to DIY radon mitigation unless you’re a qualified professional. Improper installation can be ineffective and even dangerous.
Hire a certified radon mitigation contractor. The Colorado Department of Public Health and Environment (CDPHE) maintains a list of certified contractors.
Look for contractors who are certified by the American Association of Radon Scientists and Technologists (AARST) or the National Radon Proficiency Program (NRPP).
These certifications ensure that the contractor has the necessary training and experience to install a radon mitigation system correctly.
Colorado offers some financial assistance programs for radon mitigation. Check with the CDPHE for information on available grants and rebates.
The Denver Department of Public Health & Environment may also have local resources or programs available. Contact them directly for the most up-to-date information.
One common mistake homeowners make is delaying radon testing until after they’ve completed their renovations. This can be a costly error, as it may require tearing out finished work to install a mitigation system.
Another mistake is relying on a single test result. Radon levels can fluctuate over time, so it’s a good idea to conduct multiple tests, especially if you have concerns.
Also, don’t ignore the problem if your radon levels are slightly below 4 pCi/L. The EPA recommends considering mitigation even at levels between 2 and 4 pCi/L.
Long-term exposure to even low levels of radon can increase your risk of lung cancer. It’s a cumulative effect, so the longer you’re exposed, the greater the risk.
Radon is the second leading cause of lung cancer in the United States, after smoking. It’s estimated to cause over 20,000 lung cancer deaths each year.
Protecting your family from radon is a responsible and proactive step you can take to ensure their long-term health. Don’t let this invisible threat linger in your Denver home. Test, mitigate, and breathe easier.