TSI Pass Rate 2026: What the Data Shows

Why Pass Rate Data Matters for TSI Candidates

Before you commit $799 or $1,599 to the TSI Certification process, you want to know one thing: what are your realistic odds of passing? That's a fair question, and it's one every serious candidate asks before writing the check. Pass rate data helps you calibrate how much preparation is truly necessary, where to focus your energy, and whether a retake budget should factor into your planning.

The challenge is that the National Roofing Contractors Association - the governing body for NRCA PROCertification - does not publish aggregate pass rate statistics to the public. This is not unusual for trade certifications, but it does mean candidates are working without the clear benchmarks you might find for nationally standardized exams. What we can do is read the data that is available: exam format, domain weighting, prerequisite thresholds, and fee structures. Together, these paint a detailed picture of where candidates succeed and where they stumble.

What NRCA Publicly Discloses About Pass Rates

The NRCA PROCertification program governs the TSI Certification through a two-part process: an online multiple-choice eligibility exam and a hands-on performance assessment conducted by a Qualified Assessor. The scoring model for both components is pass/fail - there is no published scaled score, no percentile ranking, and no public dataset showing what fraction of test-takers earn certification in a given year.

What NRCA does provide publicly is the Thermoplastic Systems Installer Job Task Analysis (dated May 2020) and the Low-Slope Roof Systems Exam Content Outline (dated November 2020). These documents define exactly what the exam tests and at what weight. That domain weighting data is the closest thing we have to a difficulty map - and it is specific enough to be genuinely useful.

Understanding what TSI is at a structural level helps here. This is not a theory-only credential. The certification is designed to verify that an installer can perform thermoplastic roofing work to a professional standard in the field, not just answer questions about it. That dual structure - written exam plus physical skills demonstration - means there are two distinct failure points, each with different preparation demands.

What the Exam Format Tells Us About Difficulty

The online eligibility exam consists of 60 multiple-choice questions. Audio versions of both questions and answers are available, and the exam is offered in English or Spanish. These accessibility features are meaningful - they signal that NRCA wants to reduce language and literacy barriers so that only actual knowledge of thermoplastic systems, not reading speed, determines the outcome.

The pass/fail scoring model removes one common stress point: you do not need to chase a specific score. But it also removes a safety net. You either demonstrate sufficient competency across the domain weighting or you do not. There is no partial credit, no borderline "almost passed" zone that gets rounded up.

The 12-month validity window for a passing eligibility exam result is a detail that catches some candidates off guard. If you pass the online portion but then delay scheduling your hands-on Qualified Assessor evaluation, you could forfeit your eligibility and need to retake the online exam. That's an additional $199 to $399 out of pocket - before you've even sat for the skills assessment.

For a detailed breakdown of every fee scenario, see our TSI Certification Cost 2026: Complete Pricing Breakdown.

The Domains That Decide Outcomes

When NRCA designed the TSI exam content, they weighted domains by the frequency and criticality of each task in real roofing work. That weighting is your clearest signal about where pass/fail decisions are likely made. Here is the full domain breakdown from the Job Task Analysis:

The numbers are unambiguous. Domain 5 (Materials Installation) and Domain 6 (Membrane Seaming) together represent 49% of the Job Task Analysis weighting. On the online eligibility exam specifically, Materials Installation climbs to 37% of content - making it the single largest block of questions on the entire test. A candidate who is shaky on sheet layout, attachment methods, or membrane substrate preparation is at serious risk of failing before they ever reach the hands-on assessment.

Our TSI Exam Domains 2026: Complete Guide to All 8 Content Areas breaks down exactly what each domain covers at the task level, including the specific pipe penetration and curb flashing details that appear in both exam and hands-on components.

Lower-Weight Domains Still Matter

Candidates sometimes make the mistake of ignoring Domain 1 (Project Safety at 13%) or Domain 3 (System Materials at 10%) because they feel more comfortable with "soft" knowledge areas. This is a trap. Safety questions in trade certification exams tend to be scenario-based and specific - OSHA fall protection requirements, personal protective equipment selection, and hazardous material handling on a low-slope job site are not topics you can bluff through. Similarly, Domain 4 (Tools and Equipment) at 6% and Domain 2 (General Work Practices and Communication) at 7% carry enough combined weight that neglecting them can tip a borderline candidate into a failing score.

The Hands-On Assessment: Where Candidates Struggle

The performance assessment conducted by a Qualified Assessor introduces a variable that written exam preparation simply cannot eliminate: real-time execution under observation. Candidates can complete the assessment either on a physical mockup or through approved photo and video media submission, but either way, the evaluator is judging actual thermoplastic installation technique against the standards defined in the Job Task Analysis.

The domains most directly tested in a hands-on setting are predictably the highest-weighted ones - Materials Installation and Membrane Seaming. This means a candidate needs to not only know what a properly executed seam looks like but also be able to produce one consistently, document it credibly, or demonstrate it live. The Qualified Assessor's compensation is negotiated separately and is not included in the certification fee, which means candidates need to factor in that additional cost and coordination effort when planning their timeline.

Candidates who have read about how hard the TSI exam is often report that the written portion feels manageable with structured preparation - but the hands-on component reveals gaps in technique that years of on-the-job work sometimes normalize. The exam does not grade on the curve of "good enough for a crew" - it grades against a defined professional standard.

The Eligibility Filter Most Candidates Miss

Before a candidate ever reaches the 60-question online exam, NRCA applies a significant prerequisite filter. To sit for the TSI exam, you must have:

• A minimum of 24 months of thermoplastic roof system installation experience
• That experience must include pipe penetration and curb flashing details, sheet layout, and attachment
• Your most recent qualifying experience must fall within the past 12 months
• Employer validation of your experience, skills, and knowledge
• Valid government-issued photo ID at the time of assessment

This prerequisite screen functions as a de facto pass rate filter before any exam is taken. Candidates who do not meet these thresholds cannot register - which means the pool of people who actually sit for the TSI exam is already pre-selected for a baseline level of field competency. That context matters when interpreting any informal data about "how hard" the exam is. The people taking it already know thermoplastic roofing; the exam is testing whether their knowledge and technique meet a certification-level standard.

The Real Cost of Failing the TSI Exam

Because NRCA does not publish pass rates, the fee structure becomes an important indirect signal of how seriously candidates should treat preparation. Consider the full financial picture:

A nonmember who fails the online eligibility exam once is looking at a $1,998 investment before achieving certification - and that still does not include the Qualified Assessor coordination costs. For a nonmember who fails twice, that total climbs to $2,397. This financial reality is one of the strongest arguments for treating preparation as an investment, not an afterthought. Our TSI Salary Guide 2026 and complete ROI analysis explore whether the credential justifies these costs in career terms.

Preparation Patterns That Correlate With Success

Without published pass rate data, the best evidence we have about what works comes from the exam's own design. The content outline tells you precisely what to study. The domain weighting tells you how much time to allocate. Here is a practical approach to structuring preparation around TSI-specific content:

This sequence front-loads the highest-weighted content areas because those domains carry the most questions. Candidates who start with Domain 8 (Job-Site Housekeeping at 4%) and work their way up are spending early preparation energy - typically the highest quality - on the content that matters least. Reverse that order.

For a complete study plan built around the TSI's specific format and domain structure, the TSI Study Guide 2026: How to Pass on Your First Attempt provides week-by-week task lists tied directly to exam content. Practice testing at TSIStudy.com gives you the most realistic simulation of what 60 multiple-choice questions on thermoplastic systems content actually feel like under timed conditions.

Frequently Asked Questions