- SMT here means Stone, Masonry and Ceramic Tile Cleaning Technician, a credential governed by the IICRC.
- The IICRC states there are no prerequisites, and both live-stream and in-person options are available.
- The course runs two days and 14 hours, not counting exam time.
- Fourteen hours describes course length, not a written-exam time limit.
What the SMT Credential Actually Is
The Stone, Masonry and Ceramic Tile Cleaning Technician (SMT) credential is a technician-level certification for people who clean and maintain hard surfaces: natural stone, cultured stone, ceramic tile, masonry, and grout. It is not a general cleaning certificate, and it is not related to any other credential that happens to share the same three letters. If you have searched "SMT" and landed on results about electronics manufacturing or other fields, set those aside. This article, like everything on this site, concerns the IICRC's stone, masonry and ceramic tile credential only.
The focus of the program is practical: how to choose the right tools, chemicals, and equipment for a given surface, and how to do the work in a way that protects the surface itself, the technician, and the people who occupy the space. That three-part protection theme (surface, technician, occupants) runs through the official course description and is a useful lens for everything you study.
If you are brand new to the acronym, our explainers on what SMT stands for and what SMT is cover the basics, and the SMT certification overview gives the wider picture.
Who Stands Behind It: The IICRC
The certifying body is the Institute of Inspection Cleaning and Restoration Certification (IICRC). The IICRC is the organization behind a family of cleaning, inspection, and restoration credentials, and the SMT course is one of its offerings. The official program page lives at iicrc.org/smt, and the live-stream course description is published at iicrc.org/livestreaming.
That caution matters because the credential is relatively niche. Where official detail is thin, secondary sites tend to fill the gap with guesses. We deliberately avoid doing that here, and our guides on SMT requirements and SMT exam dates follow the same rule: state what the IICRC says, and say plainly when something is not published.
How the Two-Day Course Works
The SMT is built around a course rather than a stand-alone test you sit cold. According to the IICRC's course description, the program is two days and 14 hours, excluding exam time. Two delivery options are stated: live-stream and in-person. Course availability may change, so confirm current offerings directly with the IICRC before planning travel or taking time off work.
| Item | What the IICRC states |
|---|---|
| Governing body | Institute of Inspection Cleaning and Restoration Certification (IICRC) |
| Course length | Two days, 14 hours, excluding exam time |
| Delivery options | Live-stream and in-person |
| Prerequisites | None stated |
| Exam fee, passing score, question count | Not published on the pages reviewed |
| Renewal or validity details | Not published on the pages reviewed |
One point of frequent confusion: the 14-hour figure is the course duration. It is not a written-exam time limit, and you should not budget your test-day pacing around it. If you want to understand how the exam portion is positioned relative to the course, see our breakdown of what is and is not known about the SMT passing score.
Live-stream versus in-person
The IICRC lists both formats, which is good news for technicians who cannot easily leave a job site or travel. Hard-surface cleaning is a hands-on trade, so consider what each format gives you. In-person sessions generally make it easier to handle materials, see product reactions, and ask questions at the bench. Live-stream sessions trade some of that tactile exposure for convenience. Whichever you choose, plan to supplement the course with real-world practice on scrap tile, sample stone, or supervised jobs.
What the Curriculum Covers
The official description frames the course around maintenance and cleaning of natural and cultured stone, ceramic tile, masonry, and grout, with emphasis on tools, chemicals, equipment, and protecting surfaces, technicians, and occupants. The IICRC does not publish a formal exam outline with named, weighted domains. For study purposes, we organize everything under a single editorial domain:
Domain 1: Stone, masonry, ceramic tile, and grout cleaning and maintenance curriculum (unweighted)
This is an editorial summary of the official course curriculum, not an official exam domain and not an exhaustive blueprint. No official percentages were found, so do not assume any topic is weighted more heavily than another.
- Identifying the surface before choosing a method
- Selecting appropriate tools and equipment
- Choosing and handling cleaning chemicals safely
- Maintaining stone, tile, masonry, and grout over time
- Protecting the surface, the technician, and building occupants
For a closer look at how we map this curriculum to study topics, read our SMT exam domains guide.
Know Your Materials: Stone, Tile, Masonry and Grout
The single biggest practical skill in this field is matching the method to the material. A product that is perfectly safe on glazed ceramic tile can permanently damage certain natural stones. The course description's explicit mention of both natural and cultured stone signals that candidates should be able to tell them apart and understand why that distinction affects cleaning decisions.
Natural stone versus cultured stone
Natural stone is quarried material with its own mineral composition, porosity, and sensitivity to chemicals. Cultured (manufactured) stone is engineered, so its behavior under cleaning can differ. A technician needs a working vocabulary for both and the judgment to know when a surface calls for a gentler approach.
Ceramic tile and grout
Ceramic tile is usually the more forgiving surface, but grout is often the real cleaning challenge. Grout lines are porous and collect soil, so they are frequently where a job succeeds or fails. Expect to think about how grout interacts with chemicals and equipment, and how maintenance routines keep it from degrading.
Masonry
Masonry brings its own considerations, including porosity and exposure to weather and soiling. Understanding how these materials absorb and release moisture and contaminants is central to choosing safe, effective methods.
What the IICRC Does Not Publish
Being honest about gaps is part of good exam prep. On the official pages we inspected, the IICRC does not publish the following for the SMT: a formal exam outline with named weighted domains, a question count, a passing score, an exam fee, an external testing provider, a pass rate, a version year, or renewal and validity details.
What does that mean for you? Practically, you should confirm the specifics of registration, fees, and exam logistics directly with the IICRC or your course provider when you enroll. Ignore any site that states a precise pass rate or cut score as settled fact. Our pages on SMT certification cost and SMT pass rate explain how to think about these unknowns without inventing numbers.
Key Takeaway
Because there is no published weighted blueprint, prepare for the whole curriculum evenly. Do not skip a material type or topic because a forum post claims it is "never tested."
Who Benefits From Earning It
With no prerequisites stated, the SMT is open to people at different stages of a career. Likely candidates include:
- Carpet, upholstery, and general cleaning technicians adding hard-surface services
- Restoration and floor-care professionals who regularly encounter tile, stone, and grout
- Owners of small cleaning businesses who want a recognized credential to show customers
- Newcomers who want structured training before taking on stone or masonry work
Employers and customers in this space care about whether a technician can work on valuable surfaces without damaging them, so a recognized credential can help signal competence. We discuss career angles in SMT jobs, and for earnings context see the SMT salary guide. We do not quote salary numbers here because the IICRC does not publish them. If you are weighing the investment, our worth-it analysis walks through the decision qualitatively.
Matching Your Prep to the Curriculum
Since the content is one broad curriculum, a simple two-week structure works well for most candidates who have already attended or are about to attend the course. Adjust it to your schedule and experience.
Surfaces and chemistry
- Review natural stone, cultured stone, ceramic tile, masonry, and grout as separate material types
- Write out which chemicals and methods are risky for each
- Revisit course notes on tools and equipment
Protection and application
- Practice scenario thinking: surface, technician, occupants
- Take timed questions in a practice format
- Review any weak material types identified in practice
Start with materials because everything else (chemical choice, tool selection, safety precautions) depends on correctly identifying the surface. When you are ready to test yourself, try the free questions on our SMT practice test, and use the SMT study guide and SMT cheat sheet for structured review. For a realistic sense of effort, read how hard the SMT exam is. Our SMT training overview also covers how to pair coursework with hands-on practice.
Frequently Asked Questions
It stands for Stone, Masonry and Ceramic Tile Cleaning Technician, a credential governed by the IICRC. It is unrelated to other credentials that share the acronym.
The IICRC states there are no prerequisites. See our SMT requirements guide for more detail on what is and is not specified.
The IICRC describes a two-day, 14-hour course, excluding exam time. That figure is course duration, not a written-exam time limit.
The IICRC lists both live-stream and in-person options. Course availability may change, so confirm current offerings with the IICRC before registering.
The IICRC pages we reviewed do not publish a passing score, question count, or exam fee. Confirm those directly with the IICRC or your course provider, and be skeptical of unattributed figures elsewhere online.