Boise's Basements: Radon Hiding Allergy Mold?
By Franklin Everett ShawImagine stepping into your Boise basement, a space that should be a haven, only to be met with a musty odor and a nagging worry about unseen dangers. It’s a common scenario here in the Treasure Valley, where the unique soil composition and building practices can create the perfect storm for radon and mold. But don’t despair! This isn’t a problem you have to live with. This guide will equip you with the knowledge and tools to take control of your basement’s air quality, ensuring a healthier and safer home for you and your family.
First, let’s tackle the invisible threat: radon. Radon is a naturally occurring, odorless, and colorless radioactive gas that seeps up from the ground. In Boise, our granite bedrock contributes to higher-than-average radon levels in some areas. The EPA recommends taking action if radon levels are at or above 4 picocuries per liter (pCi/L).
Here’s how to test your Boise basement for radon, step-by-step:
Choose a Testing Method: You have two main options: a short-term test kit or a long-term test kit. Short-term kits are convenient and provide results in 2-7 days. Long-term kits, which test for 90 days or more, offer a more accurate annual average, accounting for seasonal fluctuations. Given Boise’s distinct seasons, a long-term test is often the more reliable choice. You can purchase these kits at most hardware stores in Boise, like Lowe’s on Franklin Road or Home Depot on Milwaukee Street, or online. Look for kits certified by the National Radon Proficiency Program (NRPP) or the National Radon Safety Board (NRSB).
Prepare Your Basement: Close all windows and exterior doors 12 hours before starting the test and keep them closed during the testing period. This is crucial for accurate results. Avoid running fans that exhaust air to the outside. Normal entry and exit are fine.
Place the Test Kit: Follow the instructions included with your kit. Typically, you’ll place the detector in the lowest lived-in level of your home – in most cases, your basement. Position it in a frequently used room, away from drafts, high heat, and direct sunlight. Keep it at least 20 inches above the floor and away from exterior walls.
Wait and Send: Leave the test kit undisturbed for the recommended testing period. Once complete, seal the kit as instructed and mail it to the lab for analysis.
Interpret Your Results: The lab will send you a report with your radon level. If your results are 4 pCi/L or higher, the EPA recommends mitigation. Even levels between 2 pCi/L and 4 pCi/L warrant consideration of mitigation.
Now, let’s move on to mold, another common basement woe in Boise. Boise’s climate, with its cold winters and relatively dry summers punctuated by occasional heavy rainfall, can create conditions conducive to mold growth, especially in basements with poor ventilation or foundation leaks. Common allergy-triggering molds found in Boise basements include Cladosporium, Penicillium, and Aspergillus.
Here’s how to identify potential allergy-triggering molds in your Boise basement:
Visual Inspection: Look for visible mold growth on walls, floors, ceilings, and around pipes. Mold can appear in various colors, including black, green, brown, and white. Pay close attention to areas that are damp or have a history of water damage.
Sniff Test: A musty or earthy odor is a strong indicator of mold growth, even if you can’t see it.
Check for Water Damage: Look for signs of water damage, such as water stains, discoloration, peeling paint, or warped wood. These are prime breeding grounds for mold. Common culprits in Boise include leaky sprinkler systems near the foundation, improper grading that directs water towards the house, and condensation from poorly insulated pipes.
Allergy Symptoms: If you experience allergy symptoms like sneezing, runny nose, itchy eyes, or coughing when you’re in your basement, mold could be the culprit.
If you suspect mold, it’s crucial to identify the type of mold present. While some molds are relatively harmless, others can be toxic.
Here’s how to test for mold in your Boise basement:
Surface Sampling: Use a mold test kit to collect samples from surfaces where you suspect mold growth. These kits typically include swabs or tape strips that you use to collect samples. You can find these kits at local hardware stores or online.
Air Sampling: Air sampling kits collect mold spores from the air. These kits are useful for detecting hidden mold growth or for assessing the overall mold spore count in your basement.
Professional Mold Inspection: For a comprehensive assessment, consider hiring a professional mold inspector. They have the expertise and equipment to identify mold growth, determine the type of mold, and assess the extent of the problem. Look for inspectors certified by organizations like the Institute of Inspection, Cleaning and Restoration Certification (IICRC).
Once you’ve identified radon or mold, it’s time for remediation.
Here are specific remediation strategies tailored to the Boise climate and building practices:
Radon Mitigation:
Sub-slab Depressurization (SSD): This is the most common and effective radon mitigation technique. It involves installing a PVC pipe through the basement floor and connecting it to a fan that draws radon gas from beneath the slab and vents it safely outside. Given Boise’s clay-rich soil, proper sealing of the slab is crucial for SSD systems to function effectively.
Sealing Cracks and Openings: Sealing cracks in the foundation and around pipes can help reduce radon entry. Use a high-quality sealant specifically designed for concrete.
Ventilation: Increasing ventilation in your basement can help dilute radon levels. However, this is typically not sufficient as a standalone mitigation method.
Mold Remediation:
Fix the Moisture Source: This is the most critical step. Identify and repair any leaks or sources of moisture in your basement. This might involve repairing foundation cracks, improving drainage around your home, or insulating pipes to prevent condensation.
Clean or Remove Mold-Contaminated Materials: Non-porous materials like concrete and tile can be cleaned with a mold-killing solution. Porous materials like drywall and carpet that are heavily contaminated with mold should be removed and replaced.
Improve Ventilation: Increase ventilation in your basement to reduce humidity levels. Consider using a dehumidifier, especially during the wetter months.
Use Mold-Resistant Products: When rebuilding or renovating your basement, use mold-resistant drywall, paint, and other building materials.
Boise-Specific Resources and Regulations:
Central District Health Department: This local agency provides information and resources on radon and mold. They can also provide referrals to qualified radon mitigation and mold remediation professionals.
Idaho Department of Environmental Quality (IDEQ): The IDEQ regulates radon testing and mitigation professionals in Idaho. Ensure that any professional you hire is licensed by the IDEQ.
City of Boise Building Department: Check with the City of Boise Building Department for any local regulations or permits required for radon mitigation or mold remediation work.
Common Mistakes and Pitfalls:
DIY Radon Mitigation: While DIY radon testing is fine, radon mitigation is best left to professionals. Improper mitigation can be ineffective or even increase radon levels.
Ignoring Moisture Problems: Simply cleaning up mold without addressing the underlying moisture problem will only lead to recurrence.
Using Bleach Alone: Bleach can kill surface mold, but it doesn’t penetrate porous materials to kill the roots. Use a mold-killing solution specifically designed for mold remediation.
Not Sealing Properly: When sealing cracks and openings, use a high-quality sealant and ensure that all cracks are completely sealed.
Failing to Test After Remediation: After radon mitigation or mold remediation, it’s essential to retest to ensure that the problem has been effectively addressed.
Taking these steps will help you create a healthier and safer basement environment in your Boise home. Don’t let radon and mold compromise your family’s well-being. Take action today!