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What Is Dry Fogging?


Dry Fogging involves using specialist fogging equipment to disperse a dry fog or mist of mould-killing or mould-inhibiting agents throughout a property. At the same time, Dry Fogging might seem like a quick and efficient way to address Mould issues, but dry fogging has many limitations that ultimately make it ineffective. Dry Fogging alone does not eliminate Mould; it is a low-cost temporary solution that, on the surface, may appear to work, but in reality, it leaves behind the Mould Root Structure. Dry Fogging is also against the Mould Remediation standards of ANSI, IICRC, and the EPA.

The ANSI/IICRC S520 Standards for Mould Remediation clearly state on multiple occasions:

“Physically removing mould contamination is the primary means of remediation. Mold contamination should be physically removed from the structure, systems, and contents…. Attempts to kill, encapsulate, or inhibit Mould instead of proper source removal generally are not adequate.”


  • Dry fogging fails to address the cause of water or moisture intrusion, which is the initial trigger for Mould growth. Before Mould can develop, there must be a source of moisture. Dry fogging tackles surface-level problems within the house, and focusing on this method neglects the critical step of identifying and resolving the root cause of the moisture problem.
  • Mould is a fungi, which has root-like structures called hyphae. Mould spreads through hyphae, root-like structures that embed deeply into porous materials like plasterboard or untreated wood. This is where dry fogging falls short because it does not remove the actual mould structure from the building materials, leaving a health risk behind. This means that the Mould is likely to regrow. In simpler terms, despite the appealing low cost and quick turnaround time of dry fogging for Mould Removal, it’s not a cost-effective solution when the Mould returns. Many companies offering Dry Fogging for Mould Remediation suggest continuous treatment plans, acknowledging their temporary solution and aiming to secure repeated income from future treatments. Addressing the root cause of Mould growth, though potentially more costly at the beginning, proves to be a wiser, long-term investment. By resolving the underlying moisture or water issues, you can effectively remove the Mould and its structure, leading to lasting, long-term results. Proper source removal not only eradicates the current Mould problem but also safeguards your home against future infestations, ultimately saving time, money, and effort.
  • Although the dry fogging technique is innovative, it cannot penetrate walls or ceilings and eliminate Mould colonies that grow behind these surfaces—simply treating the symptoms without addressing the root cause of the Mould problem. The structural deterioration often associated with Mould’s presence will lead to ongoing structural degradation. Mould will continue to grow in cavities, behind walls or ceilings that are superficially “treated”. A comprehensive approach is necessary to tackle this issue effectively – one that targets visible Mold and understands and resolves the underlying factors contributing to its growth.

Don’t kill Mould; safely remove it instead.


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