Houston's Humid AC: Toxic Drywall & Lungs?

By Franklin Everett Shaw

August 6, 2025

The musty smell lingered, a constant, unwelcome guest in their newly purchased Houston home. It wasn’t the comforting aroma of old wood or a damp basement; it was acrid, almost metallic, and seemed to intensify with the oppressive Gulf Coast humidity. Little did they know, this odor was a warning sign, a silent scream from the walls themselves: toxic drywall.

Houston, we have a problem. And that problem is Chinese drywall.

The infamous Chinese drywall crisis, largely impacting homes built between 2001 and 2009, continues to plague homeowners, particularly in humid climates like Houston. The elevated humidity acts as a catalyst, accelerating the off-gassing of sulfur compounds from the defective drywall. This isn’t just about a bad smell; it’s about your health and the structural integrity of your home.

So, how do you know if your Houston home is affected? Let’s dive into the telltale signs.

First, the smell. It’s often described as a rotten egg or sulfur-like odor. This smell is more noticeable in enclosed spaces and during periods of high humidity, which, let’s face it, is most of the year in Houston. Think closets, bathrooms, and even behind furniture.

Second, look for corrosion. The sulfur gases released by the drywall react with copper and other metals. Check the copper wiring in your electrical outlets, air conditioning units, and appliances. Blackening or corrosion of these components is a strong indicator. Even silver jewelry left out can tarnish rapidly.

Third, health symptoms. Exposure to the gases emitted by toxic drywall can cause a range of health problems. These include:

Respiratory irritation: Coughing, wheezing, shortness of breath.
Eye irritation: Burning, itching, watery eyes.
Sinus problems: Congestion, runny nose, sinus infections.
Headaches: Frequent or persistent headaches.
Fatigue: Unexplained tiredness.

These symptoms can be easily mistaken for allergies or a common cold, especially in Houston, where allergies are rampant. However, if these symptoms persist or worsen, particularly when you’re at home, consider the possibility of toxic drywall.

Now, let’s talk about the specific challenges Houston homeowners face. The Gulf Coast climate is a double-edged sword. The high humidity exacerbates the off-gassing of the drywall, making the problem more pronounced. But it also creates a breeding ground for mold, which can further complicate the situation and make it harder to distinguish between drywall-related symptoms and mold-related symptoms.

What to do if you suspect toxic drywall? Don’t panic. Here’s a step-by-step approach:

Visual Inspection: Carefully examine your home for the signs mentioned above. Pay close attention to areas with high humidity.
Copper Mirror Test: This is a simple test you can do yourself. Place a small, clean copper mirror in an enclosed space (like a closet) for 24-48 hours. If the mirror tarnishes or develops a black film, it suggests the presence of sulfur gases.
Professional Testing: The most reliable way to confirm the presence of toxic drywall is to hire a qualified inspector. They can take samples of your drywall and send them to a lab for analysis. Look for inspectors in the Houston area who specialize in drywall testing and remediation. Companies like “Drywall Inspection Services of Houston” or “Gulf Coast Environmental Services” are good starting points.
Consult a Doctor: If you’re experiencing health symptoms, see a doctor and explain your concerns about toxic drywall. They can help determine if your symptoms are related to drywall exposure and recommend appropriate treatment.
Remediation: If the presence of toxic drywall is confirmed, remediation is necessary. This involves removing the affected drywall and replacing it with safe, compliant materials. This is not a DIY project. It requires specialized equipment and expertise to prevent further contamination.

Choosing a remediation contractor in Houston is crucial. Here’s what to look for:

Experience: Choose a contractor with specific experience in toxic drywall remediation. Ask for references and check their credentials.
Licensing and Insurance: Ensure the contractor is properly licensed and insured.
Remediation Plan: A reputable contractor will develop a detailed remediation plan that outlines the steps involved, including containment, removal, disposal, and replacement.
Air Quality Testing: The contractor should conduct air quality testing before, during, and after the remediation process to ensure the air is safe to breathe.
Proper Disposal: The contaminated drywall must be disposed of properly to prevent environmental contamination. The contractor should have a plan for this.

Common mistakes developers face include:

Underestimating the scope of the problem: Toxic drywall can affect more than just the walls. It can also contaminate insulation, wiring, and other building materials.
Improper disposal of contaminated materials: This can lead to further contamination and environmental damage.
Inadequate ventilation during remediation: This can expose workers and residents to harmful gases.
Failing to address the root cause of the problem: Simply replacing the drywall without addressing the underlying moisture issues can lead to recurrence.

Overcoming these challenges requires a thorough assessment, a detailed remediation plan, and the use of qualified professionals. Don’t cut corners. Your health and the value of your home are at stake.

Let’s talk about resources. The Texas Department of State Health Services (DSHS) has information on toxic drywall and its health effects. The Consumer Product Safety Commission (CPSC) also has resources available. For legal assistance, consider contacting a Houston-based attorney specializing in construction defects.

Finally, remember that dealing with toxic drywall can be a stressful and overwhelming experience. Don’t hesitate to seek support from friends, family, or a therapist. You’re not alone. Many Houston homeowners have faced this challenge, and there are resources available to help you navigate it. Take a deep breath, gather your information, and take action. Your health and your home are worth it.