Tucson Homes: Stucco Lies Hiding *Aspergillus*?
By Franklin Everett ShawThe musty smell hits you the moment you open the door, a subtle but persistent reminder that something isn’t quite right. You’ve noticed some discoloration on the baseboards, a faint, earthy odor that wasn’t there before. Living in Tucson, Arizona, with its unique climate and prevalence of stucco homes, you suspect the worst: mold, potentially Aspergillus, lurking behind your stucco walls. But how can you be sure, and what can you do about it before it becomes a serious problem?
This guide is your practical roadmap to identifying potential Aspergillus mold growth behind stucco exteriors in Tucson. We’ll focus on DIY moisture testing techniques, local resources, and when it’s absolutely crucial to call in the professionals. Forget generic advice; this is about your home, your health, and your peace of mind in the Old Pueblo.
First, understand why stucco homes in Tucson are particularly vulnerable. Stucco, while durable and aesthetically pleasing, is porous. In Tucson’s climate, characterized by intense sun, occasional monsoons, and significant temperature fluctuations, stucco can develop cracks. These cracks become entry points for moisture, creating the perfect breeding ground for mold, especially Aspergillus, which thrives in warm, damp environments.
Recognizing the Warning Signs:
Don’t wait for the musty smell to become overwhelming. Early detection is key. Here are some telltale signs that moisture might be intruding behind your stucco:
- Visible Cracks in the Stucco: Hairline cracks are common, but larger cracks, especially those running horizontally, are a major concern. Pay close attention to areas around windows, doors, and where the stucco meets the foundation.
- Discoloration or Staining: Look for dark streaks, water stains, or any unusual discoloration on the stucco surface. These often indicate water runoff and potential moisture buildup.
- Efflorescence: This is a white, powdery deposit that appears on the stucco surface. It’s caused by salts leaching out of the stucco as water evaporates, a clear sign of moisture intrusion.
- Bulging or Soft Spots: If the stucco feels soft or spongy to the touch, or if you notice any bulging, it’s likely that the underlying material is saturated with water and potentially rotting.
- Interior Signs: Don’t just focus on the exterior. Check for water stains on interior walls, ceilings, or baseboards, especially in areas adjacent to exterior stucco walls.
DIY Moisture Testing Techniques:
Before you tear into your walls, try these non-invasive moisture testing methods:
- Visual Inspection: This is your first line of defense. Carefully examine the stucco for the warning signs mentioned above. Take photos and document any areas of concern.
- Moisture Meter: A pin-type moisture meter can be used to measure the moisture content of the stucco. These meters are relatively inexpensive and can be purchased at most hardware stores in Tucson, like Lowe’s on East Broadway or Home Depot on North Oracle Road. Choose a meter with a stucco setting for accurate readings.
- How to Use: Select the stucco setting, insert the pins into the stucco, and take a reading. Compare the reading to the meter’s guidelines. A reading above 20% generally indicates excessive moisture. Test multiple areas, especially around cracks and discoloration.
- Pitfalls: Pin-type meters can damage the stucco surface, leaving small holes. Be careful not to apply too much pressure. Also, remember that these meters only measure surface moisture. The real problem might be deeper within the wall.
- Plastic Sheet Test: This simple test can help you determine if moisture is evaporating from the stucco surface.
- How to Use: Tape a clear plastic sheet (about 12x12 inches) tightly to the stucco surface in an area of concern. Leave it in place for 24-48 hours. If condensation forms on the inside of the plastic, it indicates that moisture is evaporating from the stucco.
- Pitfalls: This test is not foolproof. It only detects surface moisture and can be affected by weather conditions.
- Infrared Thermometer: While not a direct moisture test, an infrared thermometer can help you identify temperature differences on the stucco surface. Areas with higher moisture content will often be cooler than dry areas.
- How to Use: Scan the stucco surface with the infrared thermometer and look for temperature variations. Focus on areas around cracks, discoloration, and potential problem spots.
- Pitfalls: Infrared thermometers can be affected by sunlight and other factors. Use them in conjunction with other testing methods for more accurate results.
Safe Mold Testing (DIY with Caution):
If you suspect mold growth, you can collect a surface sample for testing. However, proceed with caution and wear appropriate personal protective equipment (PPE), including a respirator mask, gloves, and eye protection. Aspergillus spores can be harmful if inhaled.
- Swab Test: Use a sterile swab to collect a sample from the affected area. Gently rub the swab over the surface to collect any mold spores. Seal the swab in a sterile container and send it to a certified mold testing laboratory.
- Tape Lift Test: Press a piece of clear tape firmly onto the affected area and then peel it off. Place the tape on a clean glass slide and send it to a certified mold testing laboratory.
Local Resources for Mold Testing:
Several certified mold testing laboratories in Tucson can analyze your samples and identify the type of mold present. Here are a few options:
- Arizona Mold Testing & Inspection: Offers comprehensive mold testing and inspection services throughout Tucson.
- Enviro-Check: Provides mold testing and air quality testing services.
- Pima County Health Department: While they don’t offer direct mold testing services, they can provide information and resources on mold prevention and remediation.
When to Call the Professionals (Absolutely Necessary):
While DIY testing can provide valuable information, there are situations where professional help is essential:
- Extensive Mold Growth: If you see visible mold growth covering a large area (more than 10 square feet), it’s best to call a professional mold remediation company.
- Health Concerns: If you or your family members are experiencing symptoms such as respiratory problems, allergies, or skin irritation, consult a doctor and hire a professional mold inspector.
- Hidden Mold: If you suspect mold growth behind walls or in other inaccessible areas, a professional mold inspector can use specialized equipment to locate the source of the problem.
- Structural Damage: If you notice any structural damage to your home, such as rotting wood or crumbling stucco, it’s crucial to address the problem immediately. A professional contractor can assess the damage and make necessary repairs.
- Selling Your Home: If you’re planning to sell your home, it’s a good idea to have a professional mold inspection to ensure that there are no hidden mold problems that could affect the sale.
Local Mold Remediation Companies in Tucson:
If you need professional mold remediation services, here are some reputable companies in the Tucson area:
- Arizona Restoration Experts: Specializes in mold remediation, water damage restoration, and fire damage restoration.
- Mold Solutions of Tucson: Offers comprehensive mold remediation services, including mold removal, cleaning, and prevention.
- Dry Effect: Provides mold remediation, water damage restoration, and air duct cleaning services.
Preventing Future Mold Growth:
Once you’ve addressed the existing mold problem, take steps to prevent future growth:
- Repair Stucco Cracks: Seal any cracks in the stucco with a high-quality stucco patch.
- Improve Drainage: Ensure that water drains away from your foundation. Clean gutters and downspouts regularly.
- Ventilate Your Home: Open windows and doors to improve ventilation, especially in bathrooms and kitchens.
- Control Humidity: Use dehumidifiers to reduce humidity levels in your home.
- Regular Inspections: Inspect your stucco regularly for signs of damage or moisture intrusion.
Living in Tucson means embracing the desert lifestyle, but it also means being vigilant about potential mold problems in stucco homes. By understanding the warning signs, using DIY testing techniques, and knowing when to call the professionals, you can protect your home and your health from the dangers of Aspergillus mold. Don’t let a musty smell ruin your Tucson dream; take action and keep your home healthy and safe.