The short answer
How Bleach Works on Different Surfaces
Bleach can effectively disinfect and kill surface mold on non-porous materials like glass, metal, or tile. Its chemical properties break down mold on contact, removing the visible stain and sanitizing the area. This makes it a suitable choice for cleaning hard surfaces in bathrooms or kitchens where moisture is common.
On porous materials, bleach presents a significant problem. It cannot penetrate deep into substances like drywall, wood, or insulation to reach the mold's roots. The water in bleach can even soak in, feeding hidden mold and causing it to return. This often leads to a recurring problem that requires more extensive repair.
The Risk of Using Bleach on Drywall or Wood
Applying bleach to water-damaged drywall or wood is a common mistake. The bleach solution may appear to work initially by bleaching the mold stain, but the organism's structure often remains alive beneath the surface. This gives a false sense of security while the problem continues to grow out of sight.
Furthermore, the chlorine in bleach can weaken the paper facing on drywall and the fibers in wood. This compromises the structural integrity of the material you are trying to save. The moisture from the bleach can also wick into adjacent dry areas, potentially spreading the moisture problem.
When to Call a Mold Professional
For mold covering more than about ten square feet, or any mold resulting from contaminated water, you should consult a mold remediation professional. These situations often indicate a larger, hidden moisture issue that needs expert diagnosis and correction to prevent health risks and structural damage.
A qualified mold professional will assess the source of moisture, contain the affected area to prevent spore spread, and safely remove contaminated porous materials. They use specialized equipment like HEPA vacuums and air scrubbers to clean the air, ensuring the mold is properly addressed, not just superficially cleaned.
Safer Cleaning Alternatives for Small Areas
For small patches of surface mold on non-porous surfaces, you can use safer alternatives. A solution of distilled white vinegar or dedicated commercial mold cleaners can be effective. Always wear protective gloves, an N95 mask, and eye protection when cleaning any mold to avoid inhaling spores or causing skin irritation.
It is crucial to fix the underlying moisture problem first. Whether it is a leaky pipe, condensation, or high humidity, cleaning mold without addressing the water source is a temporary fix. Ensure the area is completely dry after cleaning to discourage mold from returning.
Steps for Addressing a Mold Problem
The correct approach to mold involves more than just killing it. First, identify and stop the water source. This may require a plumber or roofer. Next, assess the extent of the damage. Hidden moisture in walls or under flooring is common and requires professional detection tools.
Then, contaminated porous materials must be removed and discarded properly. Finally, the remaining structure must be thoroughly dried and cleaned. This systematic process, often performed by mold professionals, is the only reliable way to ensure mold does not return and your home is safe.
- Identify and stop the source of moisture immediately.
- Wear proper safety gear: N95 mask, gloves, and goggles.
- Contain the area with plastic sheeting to prevent spore spread.
- Remove and discard all porous, moldy materials like drywall or insulation.
- Clean remaining surfaces with appropriate, non-bleach antimicrobial solutions.
- Dry the area completely using fans and dehumidifiers to prevent regrowth.
Need help right now?
Call (405) 565-9833 any time, day or night, and describe what happened.
Call Now (405) 565-9833Frequently asked questions
What should I use instead of bleach to clean mold?
For non-porous surfaces, distilled white vinegar or hydrogen peroxide solutions can be effective. For porous materials like drywall, cleaning is often insufficient; removal is typically necessary. Always wear protective gear and ensure the area is dry afterward to prevent regrowth.
Can mold come back after using bleach?
Yes, mold frequently returns after using bleach on porous surfaces. The bleach kills surface mold but leaves the roots alive inside the material. The water in the bleach can also provide moisture for hidden mold to continue growing, leading to a recurring problem.
When is mold a job for professionals?
Contact a mold professional if the affected area is larger than ten square feet, if the mold is from sewage or flood water, or if it is in your HVAC system. Persistent mold after cleaning also signals a deeper issue that requires expert assessment and remediation.