Mold Removal & Remediation in Pasadena

Trusted Experts in Mold Removal for Historic and Hillside Homes Across Pasadena and Surrounding Communities

In Pasadena’s historic neighborhoods, aging pipes, heavy storms, and older construction can allow moisture to linger, leading to mold growth. Whether you live in a Craftsman home in South Pasadena or a Spanish Revival near the Rose Bowl, mold can be hidden but harmful.

Mold develops when moisture is trapped inside walls, crawl spaces, or behind finishes. In the Pasadena area, common causes include:

• Construction flaws in older homes
• Plumbing leaks from aging systems
• Faulty appliance supply lines (especially in vintage kitchens)
• Poor ventilation in basements and attics
• Heavy winter rains or summer monsoons causing water intrusion

When you discover mold, fast action matters. PuroClean of Pasadena responds quickly to stop mold at its source, dry affected materials thoroughly, and restore your property the right way, especially in homes with sensitive finishes and preserved architectural detail.

In Pasadena, even a small leak can turn into a major mold issue, especially in historic homes with older plumbing or tight insulation. Whether you own a Craftsman bungalow near Orange Grove, a mid-century home in San Marino, or a hillside estate in Altadena, mold grows fast when moisture lingers.

Mold develops when materials like drywall, insulation, or flooring remain wet for extended periods. In this area, the most common causes include:

• Construction Defects: Many South Pasadena and East Pasadena homes were built before modern moisture barriers were common. Cracks in stucco, improper flashing, or unsealed crawl spaces can allow dampness to accumulate and mold to form in unseen areas.
• Plumbing Failures: Burst pipes or aging copper plumbing, common in older Pasadena homes, can leak slowly behind walls or beneath floors, creating a mold-friendly environment.
• Appliance Failures: Leaky dishwashers, washing machines, and ice maker lines in homes from the 1940s–70s often cause hidden water damage. If your laundry room or kitchen has outdated plumbing, mold can be growing undetected.
• Lack of Maintenance: In hillside homes of East Pasadena or San Pasqual, deferred gutter cleaning or ignored roof drainage issues can cause water pooling and hidden mold.
• Roof Leaks: With heavy rainfall and Santa Ana winds, roof breaches are common in Altadena and foothill neighborhoods. Moisture entering the attic or eaves often leads to long-term mold issues.
• Storm & Flood Events: Storm runoff from the San Gabriel Mountains can overwhelm drainage systems in East Pasadena and Monrovia, leading to water seepage that encourages mold growth.
• Excessive Humidity: Crawlspaces, sunken living rooms, and older basements in Craftsman homes often trap humidity above 60%, ideal for black mold to spread quietly behind walls and trim.
• HVAC Condensation: In East Pasadena ranch homes or converted garages, poorly ventilated HVAC systems can drip condensation inside walls, leading to unnoticed mold colonies.
• Historic Materials: Many homes near the Pasadena Playhouse use lathe-and-plaster or original hardwood. These materials absorb moisture and, when mold is present, require careful, non-invasive remediation.
• Foundation Seepage: Older foundations and raised basements in South Pasadena are prone to water intrusion during winter rains, allowing slow mold growth beneath flooring or insulation.

If you’ve noticed musty smells, wall discoloration, or family members experiencing respiratory symptoms, call PuroClean of Pasadena today for a professional mold inspection.

PuroClean Emergency Mold Removal Services – Pasadena’s Fastest Response Team

Whether you’re dealing with attic mold from a roof leak in East Pasadena or crawlspace mold after flash flooding near the Arroyo Seco, PuroClean is ready 24/7 with the tools and experience to help.

Our emergency mold removal services include:

• Professional Mold Remediation
• Structural Demolition & Containment
• HEPA Vacuuming & Filtration
• Anti-Microbial Treatment
• Odor Neutralization
• Contents Pack-Out & Furniture Cleaning

We move fast to contain the mold, clean affected areas, and prevent it from returning without damaging your home’s value or architectural character.

The Mold and Odor Remediation Process:

When water losses are not handled promptly and dried down quickly, they often lead to secondary damage, such as microbial growth, cause structural components to lose their integrity, and potentially impact indoor air quality. Poor air quality can unfortunately lead to residents of the home developing serious health and respiratory issues. PuroClean’s IICRC-certified technicians follow industry standards to properly remediate the mold and return the property to a pre-loss condition.

Once we plan our course of action, our team will implement engineering controls and containment to prevent cross-contamination to unaffected areas of a building. They do this by utilizing HEPA air filtration devices.

PuroClean’s certified and trained professionals are always ready to respond to your mold emergency quickly and efficiently. Our professionals understand the stressful nature of dealing with this potential health hazard. PuroClean of Pasadena promises to keep the lines of communication open during this process. We strive to complete the mitigation of your property with the utmost care for its condition.

A remediation protocol is developed to remove contaminants by:

• Removal of compromised materials and contents per industry standards,
• A thorough cleaning using HEPA air filter devices, HEPA vacuums, thorough cleaning of all surfaces with cleaning solutions that do include EPA-registered disinfectants, followed by another HEPA vacuuming.
• Many people use bleach to clean mold; however, this is ineffective, as bleach does not kill the spores; it only bleaches them. PuroClean’s goal is to return your property to a safe and clean condition.
• Odors indicate that something could still be wet. For example, a musty, pungent odor can indicate microbial issues that can create MVOC’s (microbial volatile organic compounds) and cause health-related issues. PuroClean’s approach is to follow industry standards to develop the proper scope of repair for your home or business. This process includes employing specialized equipment, cleaning practices, followed by recommending a clearance test by a third party to ensure your property has reached the desired goal.
• Common Questions About Mold Removal
• Can I clean up the mold myself?
• It is strongly recommended that you call on a professional to perform mold removal. When mold is disturbed without using correct tools and techniques, it may spread quite fast. Allow PuroClean of Pasadena to handle the guesswork from mold removal in Pasadena, CA , leaving you with peace of mind that the mold was removed safely and completely. We’re prepared to respond to your call now at (626) 514-1400.
• Is mold damage covered by my insurance?
• Each insurer is unique. Connect with your insurance provider to figure out what is and isn’t covered, and how much it might cost.
• To Prevent Mold From Reoccurring, Consider PuroClean of Pasadena For Your Water Damage Losses
• We dry your property as fast as possible using our PuroClean QuickDry System™. Our systems are designed to promptly dry affected structural materials and contents. They can include:
• A thorough assessment and inspection of the structure. We use infrared cameras and moisture meters to determine what is wet and how wet structural materials and contents are.
• The removal of standing water.
• The installation of specialized drying equipment.


• Daily inspections and monitoring, making all necessary adjustments, until affected materials have reached their pre-loss condition and established drying goals.
• Call PuroClean of Pasadena at (626) 514-1400 now if you suspect that you have a mold issue in your home or business.