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Good buildings start with good design. A comprehensive review of the architectural plans and specifications prior to construction can identify potential problems, missing details, discontinuities in the control layers, and product specification errors, reducing the risk of future building failures. Not all plan sets are adequately or properly detailed, requiring the contractor or builder to issue requests for information or make risky assumptions that can lead to costly errors.

Architectural plans can be dozens of pages, each crowded with crucial information about the home or building. These details need to be correctly designed and clearly communicated if one hopes to construct a durable, well-performing, and long-lasting building. Errors, omissions, and oversights in this process drastically increase the chance of enduring mold or rot remediations. Let’s identify and correct these issues before construction begins by collaborating on your architectural plans and a thorough review of your assembly specifications.

Plan and specification reviews are also designed to identify inadequate information, missing details, and vague or ambiguous language that could be misinterpreted in a way that results in a potential moisture failure. By identifying this missing information early on, the Contractor or Builder, and their subcontractors, won't be making risky assumptions during construction or "field engineer a solution" onsite, which often happens when plan sets are inadequately detailed. By working collaboratively to address these omissions, a plan review ensures that the project is built right the first time, significantly reducing the risk of potential oversights and costly design flaws from insufficient information.

Our review process specifically targets areas prone to potential failures. We identify missing details, discontinuities in the control layers, improper assembly design, and incorrect application of specific products, which can be root causes of moisture intrusion. By catching these problems before construction, the process allows for the necessary redundancy to be designed into high-risk locations. This ensures a properly detailed and resilient building envelope, safeguarding the building from future moisture-related damage and the expense of remediation.
Here at ASIRI Designs, we’ve been involved in dozens of remediations all around the country. Utilizing this experience, and leveraging its associated data, we can make some rough estimates to better understand what a typical residential remediation looks like from a time & cost perspective.
The data we have indicates that remediations can be expensive with a high degree of cost variability. Mold and rot problems that arise are different for every affected building and are dependent on the design and architecture of the structure, the associated construction materials, the extent of the damage, local climate conditions, building usage and occupancy, initial installation quality, and the root of the underlying problem, which ultimately determines how it must be addressed. It’s frustrating and distressing enough to navigate a mold remediation or moisture damage, and unknown costs only add to the agony.
If you look online, you’ll see generic mold remediation quotes of $5k, $10k, $50k, $100k, or more... Why such a wide-ranging estimate?
The extent of mold growth, the root cause of the mold or rot, and associated damages dictate the necessary remediation efforts. Some of these efforts are quite drastic and expensive to implement, but are necessary to safely and effectively remove mold. There are plenty of reputable resources available online providing recommendations on cleaning active mold growth in residences. Building Science Corporation, Institute of Inspection Cleaning and Restoration Certification, U.S. Centers for Disease Control and Prevention, and the U.S. Environmental Protection Agency, just to name a few. In reviewing these resources, one will notice that recommendations are quite similar. IICRC S520 is widely recognized as the industry standard, and mold remediators may find it difficult to obtain professional liability insurance without submitting proof that they meet these (or equivalent) standards. Some states including Texas, Louisiana, Florida, Kentucky, New York, and Vermont, now require professional licensing, certifications, or training programs that closely follow IICRC guidelines. The basis for the following discussion is based on information provided by the above sources. It’s critical to review state and local municipality recommendations and requirements that you may be subject to regarding mold remediation efforts.
Small areas of active mold growth can be cleaned using a HEPA vacuum, a soap and water solution, and basic PPE such as an N95 mask and gloves, with materials contained in 6-mil bags. While some resources permit cleaning small areas without it, the IICRC S520 standard advises mini-containment for all designated Condition 2 or 3 mold contamination. Large-area procedures are elevated, requiring full containment, HEPA negative air machines exhausted to the exterior, head-to-toe protective clothing with P100 respirators, and occupants are strongly encouraged to evacuate the home.
However, the most important step in a remediation is to identify and resolve the underlying moisture problem that caused the mold growth. If this step is missed, subsequent mold remediations will occur. If the moisture problem is systemic and due to a flawed design, this can come at a great cost to remediate and repair properly, hence why it's cheaper to catch these issues early on, before construction even begins...
"I have homeowners’ insurance. Won’t that cover any potential remediation costs?" Unfortunately, the answer is almost always no. A typical homeowners’ insurance policy only covers mold or rot remediations if they were caused by a covered peril. This is fancy insurance speak for a specific, sudden, and identifiable event causing property damage that’s covered by your policy. Progressive mold and rot damage induced by poor moisture management and inadequate building envelope design is typically classified as maintenance or wear and tear damage. These types of damages are almost always placed on the exclusions list of a homeowner’s policy.
This wasn’t always the case, but it started becoming industry standard decades ago due to the uptick in mold-related claims by homeowners. Note that this uptick coincides with the widespread adoption of engineered lumber, less mold-resistant construction materials, and increased energy efficiency requirements, leading to what we call 'reckless' insulation practices. Some of these claims resulted in multi-million dollar payouts and lawsuits, such as Ballard v. Farmers Insurance Group (officially Allison v. Fire Insurance Exchange). Being an unsustainable occurrence for insurance companies, as premiums couldn’t sustain so many claims without going bankrupt, policies were largely rewritten to include mold, wet rot, and fungus on their exclusions list.
What does this mean for homeowners? It means that mold problems related to non-covered perils are paid for exclusively by the homeowner out of pocket. Of course, you should always check with your agent, the policy carrier, and read the policy itself to confirm this is the case for your specific situation.

Portland, Oregon, United States
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