ACT Large Format Tile
More study resources
Cheat sheet
Keep the key ideas within reach.
ExploreKey terms
Get comfortable with the vocabulary.
ExploreStudy plan
Give each week a clear focus.
ExploreCommon mistakes
Understand the traps and how to avoid them.
ExploreCase studies
Put your knowledge to work in context.
ExploreExam-day guide
Prepare for the day ahead.
ExploreAbout this exam
The ACT Large Format Tile credential is an advanced certification for tile installers who work with large-format tile and want independent verification of their skill. It is aimed at experienced setters, crew leads, and installers moving into higher-end residential and commercial work where big panels demand better substrate prep, mortar selection, and lippage control than small tile does. The exam blends a multiple-choice knowledge test with a hands-on practical assessment, so it measures both what you know and what your hands can do. Knowledge areas include substrate evaluation and flatness, mortars and adhesives, layout and planning, installation technique, leveling systems and lippage, movement accommodation and joint design, waterproofing in wet areas, cutting and tooling, and safety and industry standards. Preparation works best as a combination of code and standards study, manufacturer technical data, and deliberate practice on mock-ups: build a substrate, check flatness, set a few large panels, and evaluate your own lippage. Confirm current scheduling, pricing, and scoring directly with the certifying body, which publishes the authoritative details.
What you'll study
About ACT Large Format Tile preparation
What is the exam format?
It combines a multiple-choice knowledge section with a performance-based practical assessment. The written portion tests standards, materials, and methods; the practical portion has you demonstrate layout, substrate prep, setting, and finishing on a test assembly. The certifying body publishes the current structure and scoring breakdown.
How hard is it?
Installers with years of large-format experience usually find the concepts familiar but the standards detail demanding. The practical section is where most candidates feel pressure, because flatness tolerances and lippage are judged objectively rather than by eye. Treat it as an advanced exam, not an entry-level one.
How long is the exam, and what does it cost?
Duration and fee are set by the certifying organization and change over time, so check its official website for the current figures before you schedule. Do not rely on forum posts or older study guides for pricing or timing, since those go stale quickly.
What happens if I fail - can I retake it?
Retake rules, waiting periods, and any re-examination fees are set by the certifying body and are not universal. Review its current policy page, and ask specifically whether a failed practical section can be retested separately from the written portion, since that affects how you plan your next attempt.
In what order should I study?
Start with substrate flatness and mortar selection, because nearly every other topic depends on them. Then move to layout, installation technique, and lippage control as a connected block. Finish with movement joints, waterproofing, cutting, and safety. Practicing on mock-ups alongside reading is more effective than reading alone.
What do candidates most often get wrong?
Common weak spots are substrate flatness tolerances, coverage and mortar transfer on large panels, and movement joint placement and spacing. Many installers also underestimate how much lippage is judged on the practical. If you can explain why a joint goes where it goes, you are ahead of most candidates.
Do I need to bring my own tools?
Tool and material requirements for the practical assessment are specified by the certifying body in its candidate information. Check that document well before test day rather than assuming, and confirm what is supplied versus what you must bring, including any leveling system components.
How long is the certification valid?
Validity periods and renewal or recertification requirements are set by the certifying organization and are published on its site. Confirm the current term and what renewal involves, such as continuing education or re-testing, so you can plan ahead rather than discovering a lapse later.
Is this the same as a contractor license?
No. This is a voluntary industry certification of installer competence, separate from state or local contractor licensing. Some jurisdictions or specifiers may recognize it, but it does not replace a license where one is required. Verify local requirements with your licensing authority.