Taos Adobe: Is Your House Cracking Your Biome?

By Franklin Everett Shaw

January 30, 2026

Imagine stepping into a Taos adobe home, the scent of earth and sun filling your senses. It’s a beautiful, grounding experience. But what if that very earth, that very adobe, is subtly impacting your health? It’s a question worth asking, especially if you’re a homeowner in Northern New Mexico.

Adobe construction, a hallmark of the Southwest, offers undeniable charm and thermal benefits. However, the porous nature of adobe can also create a breeding ground for mold and bacteria, leading to indoor microbiome imbalances. This isn’t about demonizing adobe; it’s about understanding the potential risks and taking proactive steps to ensure a healthy living environment.

So, how do you know if your Taos adobe is harboring unwanted microbial guests? And what can you do about it? Let’s dive in.

First, let’s talk about testing. Forget those generic mold kits you find at big box stores. They’re often inaccurate and don’t account for the specific challenges of adobe construction in the New Mexico climate.

Here’s a better approach:

1. Visual Inspection: This is your first line of defense. Look for telltale signs of mold growth: discoloration (black, green, or white patches), musty odors, and water stains. Pay close attention to areas prone to moisture, such as:

   • Around windows and doors.
   • Near the foundation.
   • In bathrooms and kitchens.
   • Anywhere you’ve had leaks in the past.

2. Surface Swab Testing: This is a simple and relatively inexpensive way to get a preliminary assessment. Use a sterile swab (available at most pharmacies) to collect a sample from any suspect areas. Send the swab to a reputable laboratory for analysis. Look for labs that specialize in environmental testing and can identify specific mold species and bacteria.

3. Air Sampling: This is a more comprehensive approach that can detect airborne mold spores and bacteria. You’ll need to hire a qualified professional for this type of testing. They’ll use specialized equipment to collect air samples and send them to a lab for analysis. This is particularly useful if you suspect hidden mold growth behind walls or in other inaccessible areas.

4. ERMI (Environmental Relative Moldiness Index) Testing: This test analyzes dust samples to identify the presence and quantity of 36 different mold species. It provides a more comprehensive picture of the overall mold burden in your home. While not specific to adobe, it’s a valuable tool for assessing indoor air quality.

Important Considerations for New Mexico Adobe Homes:

• Climate: New Mexico’s arid climate can be deceiving. While the air is generally dry, temperature fluctuations can create condensation inside adobe walls, providing the moisture needed for mold growth.
• Building Codes: New Mexico building codes address moisture control in new construction, but older adobe homes may not meet these standards. Be aware of potential code violations and address them during any renovation or remediation projects.
• Permitting: Depending on the scope of your remediation project, you may need to obtain permits from your local government. Check with the Taos County building department for specific requirements.

Now, let’s talk about remediation. If your testing reveals mold or bacterial overgrowth, don’t panic. There are several strategies you can employ to address the problem.

DIY-Friendly Solutions (for minor issues):

• Ventilation: Increase ventilation by opening windows and using fans. This helps to reduce moisture levels and inhibit mold growth.
• Humidity Control: Use a dehumidifier to maintain indoor humidity levels below 50%.
• Natural Cleaners: Clean affected surfaces with natural mold-killing solutions, such as:
  • Vinegar: A simple and effective mold killer. Spray undiluted white vinegar on affected surfaces and let it sit for an hour before wiping clean.
  • Tea Tree Oil: A powerful antifungal agent. Mix a few drops of tea tree oil with water in a spray bottle and apply to affected surfaces.
  • Baking Soda: A mild abrasive that can help to remove mold stains. Make a paste of baking soda and water and apply to affected surfaces.

Professional Options (for more severe problems):

• Mold Remediation: Hire a certified mold remediation specialist to remove mold growth and address the underlying moisture problem. They’ll use specialized equipment and techniques to ensure that the mold is safely and effectively removed.
• Waterproofing: Apply a waterproof sealant to the exterior of your adobe walls to prevent moisture from penetrating the structure.
• Drainage Improvements: Improve drainage around your home’s foundation to prevent water from pooling and seeping into the walls.
• Adobe Repair: Repair any cracks or damage to your adobe walls to prevent moisture intrusion.

Challenges and Pitfalls:

• Misdiagnosis: It’s easy to misdiagnose mold problems, especially in adobe homes. Don’t rely solely on visual inspection. Get professional testing to confirm the presence and type of mold.
• Inadequate Remediation: Simply killing the mold is not enough. You must also address the underlying moisture problem to prevent it from returning.
• Damage to Historic Fabric: Be careful not to damage the historic fabric of your adobe home during remediation. Use gentle cleaning methods and avoid harsh chemicals.
• Ignoring Air Quality: Mold and bacteria can release toxins into the air, affecting your health. Consider using an air purifier with a HEPA filter to remove airborne particles.

Case Study: The Martinez House in Chimayo:

The Martinez family in Chimayo noticed a persistent musty odor in their historic adobe home. They initially dismissed it as “old house smell,” but their daughter started experiencing respiratory problems. They hired a mold inspector who discovered significant mold growth behind a wall in the bathroom, caused by a leaky pipe. The remediation process involved removing the affected wall, repairing the pipe, and applying a mold-resistant sealant. The family also installed a whole-house air purifier to improve indoor air quality.

Actionable Insights:

• Don’t ignore musty odors or unexplained health symptoms. They could be a sign of a hidden mold problem.
• Invest in professional testing to accurately identify the type and extent of mold growth.
• Address the underlying moisture problem to prevent mold from returning.
• Consider using natural cleaning solutions and air purifiers to improve indoor air quality.
• Consult with a qualified professional before undertaking any major remediation projects.

Living in a Taos adobe home is a unique and rewarding experience. By understanding the potential risks associated with indoor microbiome imbalances and taking proactive steps to address them, you can ensure a healthy and comfortable living environment for yourself and your family. Don’t let the beauty of adobe blind you to the potential for hidden problems. Knowledge is power, and with the right approach, you can enjoy the charm of your historic home without compromising your health.