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Case Study: Mold Remediation and Airflow Control in Basement Room – Brooklyn, NY
The Zavza Seal contractor applying the repair solution to the ceiling

Project Overview

Zavza Seal was hired to remediate mold and control air quality in a basement room in Brooklyn, NY. The homeowner reported concerns about moisture, mold growth, and poor air separation between rooms, which were contributing to persistent odors and health risks. The basement had visible signs of structural degradation and required immediate intervention.


The Problem

The client’s basement room was experiencing a combination of moisture issues and mold contamination, specifically:

  • Damaged and mold-covered wooden studs that compromised wall integrity.
  • Uncontrolled airflow between the basement room, adjoining rooms, and ceiling space, spreading mold spores and contaminants.
  • Mold growth on walls and ceiling surfaces, posing health risks.
  • Old insulation that was saturated and contributing to poor air quality.

These conditions not only made the space unusable but also posed significant health concerns due to airborne contaminants and allergens.


Our Solution

Zavza Seal implemented a detailed mold remediation and air-sealing plan tailored to the basement’s unique conditions.


1. Demolition and Removal of Mold-Damaged Materials

  • Removed and properly disposed of all old wooden studs, which were structurally compromised and infested with mold.
  • Removed and discarded old ceiling insulation, which had absorbed moisture and lost effectiveness.

This eliminated the primary sources of mold colonization and prevented further spread within the basement structure.


2. Airflow Barrier Installation

To stop contaminated air from circulating to and from the basement room, we installed high-grade vapor barriers:

  • Applied a 10-mil flat membrane between the subject area and adjacent rooms to completely block airflow.
  • Installed an additional 10-mil membrane between the ceiling and the subject area, effectively sealing off vertical air transfer.

This measure prevented cross-contamination and maintained clean, breathable air within the remediated space.


3. Professional Mold Removal and Disinfection

As a licensed mold remediation company, Zavza Seal ensured full treatment of all surfaces:

  • Sprayed the walls and ceiling with an all-natural, EPA-certified disinfectant designed to kill mold, mildew, bacteria, and viruses.
  • Our formula is non-irritating, odorless, non-flammable, and repels rodents, making it ideal for enclosed residential spaces.
  • Wiped down all treated surfaces, removing dead mold spores and residue to restore cleanliness and hygiene.

4. Air Quality Management

To maintain purified air during and after remediation, Zavza Seal deployed industrial-grade filtration systems:

  • Operated a 3-stage negative air scrubber with H13 HEPA filters and a flow rate of 550 CFM to trap airborne mold spores.
  • Ran the system in combination with a commercial dehumidifier for at least three days, significantly lowering humidity and improving air quality.

This ensured a healthy, mold-free environment moving forward.


Project Outcome

The basement room was successfully restored and sealed from external contaminants. Key outcomes included:

  • Elimination of visible and airborne mold.
  • Complete airflow separation from other rooms and the ceiling space.
  • Safe, dry, and breathable environment, suitable for storage or living use.
  • Peace of mind for the homeowner, knowing the issue was fully addressed by certified professionals.

Client Feedback

The homeowner was impressed with Zavza Seal’s thorough approach and professionalism. Our ability to resolve not only the mold issue but also the underlying airflow and moisture problems made a lasting impact.


Why Homeowners in Brooklyn Trust Zavza Seal

Zavza Seal is a top-rated mold remediation company serving Brooklyn, NY and surrounding areas. We provide:

  • Mold and mildew removal using non-toxic solutions
  • Airflow sealing and moisture barrier installation
  • Advanced air purification with HEPA filtration
  • Licensed and insured services with long-term guarantees

Get in touch for a warranted service today.

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