**Denver Homes: Radon Siding Hiding Deadly Harm?**
By Franklin Everett ShawThe crisp mountain air of Denver is one of its greatest draws, but what if that air, circulating through your home, carried a hidden danger? Radon, an odorless, colorless, radioactive gas, is a silent intruder that can seep into homes from the ground. While basements are often the first place homeowners think to check, radon can accumulate in unexpected areas, especially in homes with certain siding types common in the Denver metro area. Ignoring these potential sources could leave you and your family exposed to unnecessary risk.
Radon is a naturally occurring gas produced by the decay of uranium in soil, rock, and water. It’s a sneaky hazard because you can’t see, smell, or taste it. In Denver, the geological makeup of the Front Range contributes to elevated radon levels in many areas. This means that even if your neighbor’s home tests low, your home could still have a problem.
The primary entry point for radon is through cracks and openings in your foundation. However, in Denver, where many homes feature stucco or siding installed directly against the foundation, these materials can create a hidden pathway for radon to enter. Stucco, while aesthetically pleasing, can develop hairline cracks over time. These cracks, combined with the porous nature of some stucco mixes, allow radon to seep in behind the siding. Similarly, certain types of siding, particularly older vinyl siding installed without a proper moisture barrier, can create a channel for radon to migrate upwards and into the home through gaps around windows, doors, and utility penetrations.
Think of it like this: the siding acts as a chimney, drawing radon up from the soil and into your living spaces. This is especially true during the winter months when homes are tightly sealed, and the stack effect (warm air rising) increases the suction from the ground.
So, how do you know if your Denver home is at risk? The first step is testing. Fortunately, DIY radon test kits are readily available at hardware stores like Home Depot and Lowe’s, as well as online retailers. Look for kits certified by the National Radon Proficiency Program (NRPP) or the National Radon Safety Board (NRSB). These certifications ensure the kit meets quality standards and provides accurate results.
When conducting a DIY test, follow the instructions carefully. A common mistake is placing the test kit in a high-traffic area or near a window, which can skew the results. Instead, place the kit in the lowest livable area of your home, away from drafts and direct sunlight. For Denver homeowners concerned about siding-related radon entry, consider placing a test kit on the main floor near an exterior wall with stucco or siding.
There are two main types of DIY radon tests: short-term and long-term. Short-term tests typically run for 2-7 days and provide a quick snapshot of radon levels. Long-term tests run for 90 days or more and offer a more accurate representation of your home’s average radon level. Given Denver’s fluctuating weather patterns and the potential for seasonal variations in radon levels, a long-term test is generally recommended for a more reliable assessment.
Once you’ve completed the test, send it to the lab specified in the instructions. The lab will analyze the sample and provide you with a report indicating the radon level in picocuries per liter (pCi/L).
Colorado’s action level for radon is 4 pCi/L. If your test results are at or above this level, the Colorado Department of Public Health and Environment (CDPHE) recommends taking steps to mitigate the problem. Even if your results are below 4 pCi/L, but above 2 pCi/L, you should consider mitigation to further reduce your risk.
Mitigation involves installing a radon reduction system, typically a vent pipe and fan that draws radon from beneath the foundation and vents it safely outside. The most common mitigation technique is sub-slab depressurization, which involves creating a vacuum beneath the concrete slab to prevent radon from entering the home.
However, for Denver homes with stucco or siding concerns, a slightly different approach may be necessary. In some cases, sealing cracks and gaps in the siding and around windows and doors can help reduce radon entry. This is particularly effective if the radon test indicates higher levels near exterior walls with these materials.
If sealing alone isn’t sufficient, a mitigation system may still be required. In these cases, the mitigation professional may need to pay special attention to the area behind the siding, ensuring that the system effectively draws radon from this potential entry point. This might involve installing additional suction points or modifying the system to address the specific characteristics of your home’s construction.
Choosing a qualified radon mitigation professional is crucial. Look for companies certified by the NRPP or NRSB. These certifications ensure that the professional has the training and experience necessary to properly install a radon reduction system. When interviewing potential contractors, ask about their experience with homes similar to yours, particularly those with stucco or siding concerns.
Don’t be afraid to ask for references and check online reviews. A reputable contractor will be happy to provide you with information about their past work and customer satisfaction.
Mitigation costs can vary depending on the complexity of the system and the specific characteristics of your home. However, the cost is a worthwhile investment in your family’s health. In Denver, mitigation systems typically range from $1,200 to $3,000.
While DIY testing is a great first step, mitigation is best left to the professionals. Improperly installed mitigation systems can be ineffective or even create new problems. A certified professional will ensure that the system is installed correctly and meets all applicable building codes.
One common pitfall is neglecting to address the source of the radon. Simply masking the problem with air purifiers or ventilation systems is not a long-term solution. Mitigation focuses on preventing radon from entering the home in the first place.
Another mistake is failing to maintain the mitigation system. Radon reduction systems require periodic maintenance, such as fan replacement, to ensure they continue to function effectively. Your mitigation contractor should provide you with a maintenance schedule and instructions.
Radon is a serious health hazard, but it’s also a preventable one. By taking the time to test your Denver home and, if necessary, mitigate the problem, you can protect your family from the risks of radon exposure. Don’t let this silent intruder compromise your health and well-being. Take action today to ensure a safe and healthy home environment. Remember to consider those often-overlooked siding types as potential entry points, and you’ll be well on your way to breathing easier in the Mile High City.