- The Short Answer: Council-certified Moisture Control Consultant
- Who Issues the Credential
- Other Meanings of CMCC You Will Run Into
- What the Credential Actually Covers
- Exam Format and Fee Mechanics
- Who Qualifies: Three Experience Routes
- Keeping CMCC Distinct From CMCI
- Where the Credential Shows Up Professionally
- Reading Plan Tied to the Official References
- Frequently Asked Questions
- CMCC here means Council-certified Moisture Control Consultant, issued by the American Council for Accredited Certification (ACAC).
- The exam is 120 multiple-choice questions in three hours, closed book, with a 75% passing criterion.
- Initial US/Canada cost is USD 500: USD 100 exam plus USD 400 certification for the first two-year term.
- Candidates need documented moisture-control consulting experience; the required years depend on education (four, six, or eight years).
The Short Answer: Council-certified Moisture Control Consultant
On this site, CMCC stands for Council-certified Moisture Control Consultant. It is a professional certification for people who diagnose, specify, and document the control of moisture in buildings. The "Council" is the American Council for Accredited Certification, usually shortened to ACAC. The word "certified" matters: this is a certification earned through a documented application and an examination, not a course completion certificate or a membership title.
If you are looking for broader orientation, our related explainers cover what CMCC is, the meaning of the CMCC designation, and what CMCC certification involves. This article focuses on the acronym itself, the issuing body, and the practical facts that follow from the name.
Who Issues the Credential
ACAC administers the certification, and certification decisions are made by its CMCC Certification Board. The board reviews applications and its decisions require unanimous agreement, which is one reason the application package is taken seriously. Examination delivery is handled by a testing provider, Kryterion, Inc., which supports both testing-center and online video-proctored sessions.
Other Meanings of CMCC You Will Run Into
CMCC is a crowded acronym. Searching it will surface chiropractic-college results, climate-research uses, medical uses, and a similarly named credential, the Certified Moisture Control Contractor. None of those are the subject of this site. When you evaluate a study document or practice test labeled "CMCC," confirm that it addresses moisture control in buildings.
That caution is not theoretical. On user-uploaded document marketplaces, a file titled with a CMCC credential name can have little to do with moisture work; one CMCC-titled listing previews financial statements and transaction analysis. Another exposes moisture-science questions. A credential label on a document does not establish that its content is relevant or accurate, so check any preview against the official domain list before spending study time on it.
| If the page is about... | Is it this CMCC? |
|---|---|
| Moisture diagnosis, structural drying, building envelope, plumbing and HVAC moisture sources, ACAC | Yes |
| Chiropractic college programs | No |
| Climate-research projects or centers | No |
| Medical or clinical uses of the abbreviation | No |
| Certified Moisture Control Contractor | No (a different credential) |
What the Credential Actually Covers
The scope source is ACAC's document on the CMCC and CMCI examinations, approved March 6, 2024. Its examination objectives for the consultant credential are organized into nine domains, shown below. For a deeper walkthrough of each area, see our complete guide to all 9 CMCC content areas.
The Nine Domains
- The Science of Water
- Site Drainage
- Foundations
- Walls, ceilings, and floors
- Roofs and building envelope assemblies
- Plumbing
- HVAC
- Structural Drying
- Project documentation
Read the list as a path water takes through a building. It starts with how water behaves (including mechanisms such as capillary action), moves to how it reaches the structure from the site and foundation, travels through assemblies like walls, ceilings, floors, roofs, and the envelope, enters from building systems like plumbing and HVAC, and ends with drying and the written record of what you found and did.
A grouping difference worth knowing
ACAC's dated domain chart lists the nine lines above. The Candidate Handbook's CMCC section, a current undated web edition, lists eight headings in total: seven technical headings plus the ACAC Code of Conduct. Its grouping differs from the chart and does not separately label Plumbing or Project documentation. No issuer statement resolving this difference was found, and neither source is claimed to supersede the other.
The practical response is simple: study all nine chart lines, including Plumbing and Project documentation, and treat ethics under the ACAC Code of Conduct as additional required knowledge. No percentage weights or per-domain question allocations are published, so do not trust any site that claims to know them.
Exam Format and Fee Mechanics
The format is straightforward and fully specified by ACAC:
| Item | Detail |
|---|---|
| Questions | 120 multiple choice, at least four answer choices each |
| Time | Three hours, closed book |
| Passing criterion | 75%, set by the certification board using modified Angoff |
| Delivery | Testing center or online video-proctored |
| Question order | Randomized question and answer order |
| Results | Immediate |
The scoring details are covered in our CMCC passing score guide, and scheduling in the exam dates and scheduling guide.
What it costs
The initial fee in the US and Canada is USD 500, made up of a USD 100 examination fee and a USD 400 certification fee covering the first two-year term. ACAC's current official application quotes USD 525 outside the US/Canada. A retake costs USD 100. Optional prep courses and required reading materials are separate expenses and should be budgeted apart from issuer fees. Our CMCC certification cost breakdown lays out the full picture, including renewal.
Online exam requirements
Online candidates supply their own computer, an approved webcam, a private location, and a continuous 2 Mbps upload and download connection. Test the setup well before exam day; a marginal connection is an avoidable risk on a three-hour, closed-book exam.
Who Qualifies: Three Experience Routes
Eligibility rests on documented moisture-control consulting experience combined with education. Qualifying education is in relevant science, engineering, architecture, industrial hygiene, or related fields.
| Education | Additional requirement | Documented experience |
|---|---|---|
| High-school diploma or GED | None stated | Eight years |
| Two-year degree or equivalent | 15 qualifying credits | Six years |
| Four-year degree or equivalent | 30 qualifying credits | Four years |
The application includes four project sheets, applicable transcripts, and application verifications, followed by unanimous certification-board review. The handbook also requests employer affidavits, and applicants complete an electronic affidavit and required email verifications. For the full walkthrough, read our CMCC requirements guide.
Keeping CMCC Distinct From CMCI
ACAC publishes the CMCC and CMCI examinations together in one scope document, which is why the two get conflated. They are separate credentials. The consultant credential discussed here has its own eligibility routes, its own four-project application, and its own handbook section. When you read any guidance, check that the eligibility and education equivalents quoted belong to the CMCC consultant credential and not to the CMCI.
Where the Credential Shows Up Professionally
The credential is relevant wherever someone must explain why a building is wet and what to do about it. That includes moisture and building-science consulting, inspection and assessment work, restoration and drying projects, and service firms that advertise their certifications. Adjacent professional pages, such as those from Florida inspection and building-science firms and mold-inspector selection articles, show interest in moisture expertise, but they illustrate adjacent demand rather than documenting a hiring pipeline for this specific certification. Treat claims of scarcity or guaranteed demand with caution.
For earnings and return on investment, separate two things: evidence about moisture-consulting roles in general, and any assumed salary premium from holding the certification. We keep those distinct in our salary analysis and worth-it ROI analysis, and our overview of CMCC jobs covers the role side.
Reading Plan Tied to the Official References
The handbook points candidates to three references: the ACAC Code of Conduct, the EPA's Moisture Control Guidance for Building Design, Construction and Maintenance (December 2013), and Ken Larsen et al., Leadership in Restorative Drying, fourth edition (2014). The handbook's selected review pages supplement reading the complete prescribed references; they do not establish exhaustive exam coverage. One more caveat: a vendor page linked by ACAC describes the book as a 2014 Gold Edition, so do not assume it matches the handbook's fourth-edition label without checking.
Water behavior and the outside of the building
- The Science of Water: movement mechanisms such as capillary action
- Site Drainage and Foundations, read alongside the EPA guidance
Assemblies and building systems
- Walls, ceilings, and floors; Roofs and building envelope assemblies
- Plumbing and HVAC as moisture sources
Drying, documentation, and ethics
- Structural Drying from the Larsen text
- Project documentation and the ACAC Code of Conduct
This sequence follows the water path through a building, so each week builds on the last. Work in Project documentation early as well as late: the consultant role is as much about specifications and records as diagnosis. For a fuller plan, see the CMCC study guide, the one-page cheat sheet, and the details on training options. When you are ready to test yourself, try the CMCC practice test.
Renewal in one paragraph
Certification is valid for two years. Renewal costs USD 400 and 40 recertification credits (RCs): 10 for continued field activity plus 30 professional-development hours under current procedures. Keep your records, since they can be audited.
Key Takeaway
Start from the acronym, then verify everything against ACAC. Confirm any study material is about moisture control, study all nine chart domains plus the Code of Conduct, and reconcile conflicting application instructions with ACAC before you pay or submit. Our companion explainer and meaning guide cover the naming question from other angles, and the main practice site has questions mapped to these domains.
Frequently Asked Questions
On this site, CMCC stands for Council-certified Moisture Control Consultant, a certification issued through the American Council for Accredited Certification (ACAC). The same letters are used by unrelated organizations and credentials, so context matters.
No. The Certified Moisture Control Contractor is a different credential that happens to share the acronym. The consultant credential discussed here is issued by ACAC and has its own eligibility routes and application.
The exam has 120 multiple-choice questions with at least four answer choices, delivered over three hours, closed book. The passing criterion is 75%, set by the certification board using modified Angoff. Our difficulty guide discusses what that means in practice.
ACAC's 2025 exam pass ratio report shows 0% from one examination (0 passes out of 1). A single examination cannot establish typical difficulty, and the report includes retakes and state-licensing-only examinations. See our pass rate analysis for context.
No. A prep course is optional. Course and book costs are separate from ACAC's issuer fees, so budget for them independently if you choose to buy them.
Two years. Renewal costs USD 400 and 40 RCs, made up of 10 for continued field activity and 30 professional-development hours under current procedures. Retain your records in case of audit.