Radon, Remodeling, and Respiratory Risk in Denver Homes
By Franklin Everett ShawDenver’s charm is undeniable, from the majestic Rockies backdrop to the vibrant RiNo art scene. But beneath the surface, literally, lurks an invisible threat: radon. This odorless, colorless gas is a significant health hazard, especially in older Denver homes undergoing renovations. Ignoring radon testing during a remodel is like renovating a beautiful kitchen only to discover a hidden mold infestation later – a costly and potentially dangerous oversight.
Radon is a naturally occurring radioactive gas produced by the decay of uranium in soil and rock. It seeps into homes through cracks in foundations, gaps around pipes, and other openings. Denver’s unique geology, with its uranium-rich soil, makes it a high-risk area for radon exposure.
Before you even think about knocking down walls or laying new flooring, conduct a preliminary radon test. This initial test establishes a baseline and helps determine the scope of potential mitigation efforts. You can purchase a DIY radon test kit at most hardware stores in the Denver area, like Ace Hardware on Colfax or Home Depot near I-25. Follow the instructions carefully, ensuring the test is placed in the lowest livable level of your home, typically the basement.
If the initial test reveals elevated radon levels (4 picocuries per liter (pCi/L) or higher), don’t panic. It simply means mitigation is necessary. The EPA recommends taking action at this level.
During the renovation process, testing becomes even more crucial. Construction activities can disturb the soil around your foundation, potentially increasing radon entry. If you’re digging to expand your basement or altering the foundation in any way, conduct another radon test immediately after the work is completed. This is especially important in areas like Wash Park and Highlands, where older homes are common and foundation issues are often discovered during renovations.
Denver homes often have specific foundation types that influence mitigation strategies. Many older homes have poured concrete foundations, while others have cinder block or stone foundations. Each type requires a slightly different approach to radon mitigation.
Sub-slab depressurization (SSD) is the most common and effective mitigation technique. This involves installing a PVC pipe through the foundation slab and connecting it to a fan that draws radon gas from beneath the house and vents it safely above the roofline. The effectiveness of SSD depends on the soil type. Denver’s clay-rich soil can sometimes hinder airflow, requiring a more powerful fan or multiple suction points.
For homes with crawl spaces, a vapor barrier can be installed to prevent radon from entering the living areas. Sealing cracks and openings in the foundation is also essential, regardless of the foundation type.
After the renovation and mitigation system installation, conduct a post-mitigation radon test. This confirms the system is working effectively and that radon levels have been reduced to acceptable levels. This test should be performed by a certified radon measurement professional.
Failing to test after mitigation is a common mistake. Homeowners assume the system is working perfectly without verification. This can lead to continued exposure to elevated radon levels, negating the benefits of the mitigation system.
Radon exposure is a serious health risk. It’s the second leading cause of lung cancer in the United States, after smoking. Even low levels of radon exposure over long periods can increase your risk. Furthermore, studies suggest a link between radon exposure and respiratory illnesses like asthma, particularly in children. Denver’s high altitude and dry climate can exacerbate respiratory issues, making radon mitigation even more critical.
Finding a qualified radon mitigation professional in Denver is essential. Look for companies certified by the American Association of Radon Scientists and Technologists (AARST) or the National Radon Proficiency Program (NRPP). These certifications ensure the professional has the necessary training and expertise to properly assess your home and install an effective mitigation system.
Check online directories like the AARST website or the Colorado Department of Public Health and Environment (CDPHE) website for a list of certified professionals in the Denver metro area. Get multiple quotes and ask for references before making a decision.
Don’t be afraid to ask questions. A reputable radon mitigation professional will be happy to explain the process, answer your concerns, and provide a detailed estimate. They should also be able to explain the different mitigation options available and recommend the best solution for your specific home.
Ignoring radon during a remodel is a gamble with your health and your home’s value. Testing before, during, and after renovations is a small investment that can provide significant peace of mind. By understanding the risks, taking proactive steps, and working with qualified professionals, Denver homeowners can create a safe and healthy living environment for themselves and their families. Remember, a beautiful home should also be a healthy home.