- What Is the ALCI Certification?
- How the ALCI Assessment Is Structured
- The Passing Standard: Oral and Practical Thresholds
- The Three Gated Props
- Who Hires ALCI-Certified Installers
- Registration, Eligibility, and Fees
- Retake Rules If You Don't Pass
- Renewal Cycle and Long-Term Maintenance
- A Realistic Preparation Timeline
- Frequently Asked Questions
- ALCI is administered by the Building Performance Institute (BPI); the official credential abbreviation is ALC.
- The assessment pairs 40 oral questions with a hands-on practicum inside a combined seven-hour maximum window.
- Passing requires 90% on the oral portion, completion of all three gated props, and 93% on the 15 nongated props.
- There is no prerequisite credential or mandatory training course to sit for the exam.
What Is the ALCI Certification?
The Air Leakage Control Installer credential - widely searched as "ALCI" and used as the site identifier here at ALCI Exam Prep - is issued by the Building Performance Institute, Inc. (BPI). BPI's own paperwork uses the shorter official abbreviation ALC, but because so many professionals in weatherization and home performance search for "ALCI," that alias has stuck and this site uses it interchangeably with the formal credential name.
The current governing document is the Certification Scheme Handbook dated April 9, 2026, which lays out the exact assessment mechanics, passing thresholds, and renewal rules described below. If you're brand new to the credential and want a plain-language primer before diving into procedural details, start with What Is ALCI? or the related explainer on What Is ALCI Certification?
How the ALCI Assessment Is Structured
Unlike many certification exams built around weighted multiple-choice domains, the ALCI assessment is a two-part performance evaluation: a 40-question oral component and a hands-on practicum. Candidates should not think of these as separately timed blocks - the handbook sets a single combined maximum duration of seven hours covering both parts together. That means pacing matters as much as knowledge; running long on the oral questions eats directly into the time available for the practicum.
The practical portion is evaluated across 18 performance line items that collectively assess 51 distinct abilities. These are hands-on performance tasks, not weighted knowledge domains, so there's no percentage breakdown by "topic area" the way you'd see in a traditional multiple-choice certification. For a fuller breakdown of how these performance areas are organized, see the ALCI Exam Domains 2026: Complete Guide to All 0 Content Areas guide, which walks through how BPI frames these line items in place of traditional content domains.
Oral Component
Forty questions assess your verbal command of air sealing principles, material selection, and safety judgment. There is no partial credit cushion built into casual guessing - you need 90% correct to clear this portion.
- No notes, manuals, or reference materials are permitted during questioning
- Questions are answered in real time with an evaluator, not on paper or a screen
- Retesting only this component, if needed, is capped at one hour
Hands-On Practicum
The practicum places you in front of realistic mockups and structures where you must correctly identify, prioritize, and address air leakage points using appropriate materials and technique.
- 18 performance line items covering 51 abilities total
- Includes three mandatory "gated" props plus 15 nongated props
- No manuals or notes allowed while performing tasks
The Passing Standard: Oral and Practical Thresholds
ALCI's passing standard is unusually specific compared to many trade certifications, and it's worth memorizing exactly because there is no rounding-friendly margin:
- 90% correct on the 40-question oral component
- 100% completion of all three gated props - these are pass/fail, not scored on a curve
- 93% correct performance across the 15 nongated props
Because all three of these conditions must be met independently, a strong oral score doesn't compensate for a missed gated prop, and excelling on nongated props doesn't offset a gate failure. For a deeper walkthrough of exactly how these thresholds interact and what "passing" legally means on your score report, see ALCI Passing Score 2026: Exactly What You Need to Pass.
Key Takeaway
Treat the gated props as non-negotiable pass/fail checkpoints. A single missed gate fails the practicum regardless of how well you perform everywhere else.
The Three Gated Props
The gated props are the structural backbone of the practicum, and BPI designed them around scenarios where a mistake carries real safety consequences in the field - not just a lost point. The three gates are:
- A large hole around a heat source - testing your ability to seal air leakage paths near combustion or heat-generating equipment without creating a fire hazard.
- A non-IC recessed light - evaluating whether you understand clearance and insulation-contact restrictions around fixtures that are not rated for direct insulation contact.
- A full-height metal clearance - assessing your judgment around maintaining required clearances near metal components that run floor to ceiling.
Each of these represents a real-world failure mode that shows up repeatedly in weatherization callbacks and code violations, which is exactly why BPI made them gated rather than folding them into the general scoring pool. If you want scenario-based practice questions built specifically around these three gate types, the ALCI Cheat Sheet 2026: One-Page Review of Must-Know Facts condenses them into a fast-reference format, and our practice test platform includes scenario drills modeled on each gate.
Who Hires ALCI-Certified Installers
The credential is built for people doing physical air sealing work - insulation contractors, weatherization crews, energy auditors who also perform sealing, and home performance companies that need field staff who can be verified against a standardized skill set. Because ALCI has no prerequisite credential and no mandatory training course attached to it, employers often treat it as a stand-alone verification that a technician can be trusted around non-IC fixtures, combustion appliances, and metal clearances without direct supervision.
If you're weighing whether pursuing this credential makes financial sense for your career stage, Is the ALCI Certification Worth It? Complete ROI Analysis 2026 lays out the considerations, and ALCI Salary Guide 2026: Complete Earnings Analysis covers earnings context without relying on invented figures. Job-seekers specifically hunting for openings that name the credential should also check ALCI Jobs.
Registration, Eligibility, and Fees
One of the more approachable aspects of ALCI is its open eligibility: there is no prerequisite credential and no mandatory training course required before you can sit for the exam. That said, "no requirement" doesn't mean "no preparation needed" - the 90%/93% thresholds leave very little room for guessing.
Exams themselves are administered through BPI Test Centers, which also set initial examination prices. Because pricing is controlled at the test center level rather than fixed nationally by BPI headquarters, costs can vary by location and should be confirmed directly with your chosen center before you schedule. For a broader breakdown of what to budget for beyond the base exam fee, see ALCI Certification Cost 2026: Complete Pricing Breakdown. If you're still confirming whether you meet baseline eligibility or need clarity on scheduling windows, ALCI Requirements 2026: Eligibility, Prerequisites & How to Qualify and ALCI Exam Dates 2026: Testing Windows, Deadlines & Scheduling cover the logistics in detail.
| Element | Detail |
|---|---|
| Governing document | Certification Scheme Handbook, dated April 9, 2026 |
| Prerequisite credential | None required |
| Mandatory training course | None required |
| Administering body | BPI Test Centers (also set initial exam pricing) |
| Certification validity | 3 years |
Retake Rules If You Don't Pass
ALCI's retake structure mirrors the two-part exam format. If you clear the practicum but fall short on the oral component, the oral-only retake carries a strict one-hour limit - noticeably tighter than the original combined seven-hour window, so there's no room for the slow, deliberative pacing you might use the first time through.
If the practicum is where you fell short, retesting is scoped specifically to the leakage points you failed rather than requiring a full redo of every prop. This is a meaningful distinction: a candidate who passed two of the three gated props and only failed one metal-clearance scenario isn't forced to re-demonstrate props they already cleared - retesting addresses the failed leakage points directly.
To calibrate how much retest risk is typical, review ALCI Pass Rate 2026: What the Data Shows and How Hard Is the ALCI Exam? Complete Difficulty Guide 2026 before you schedule your first sitting.
Renewal Cycle and Long-Term Maintenance
ALCI certification is valid for three years, and BPI's renewal design rewards active field experience over generic continuing education - notably, CEUs do not apply to ALC renewal at all. Instead, the renewal path depends on hours worked or trained, plus a consistent renewal cadence:
- First two renewals: A field-exam exemption is available if you log 3,000 relevant practitioner hours or 100 relevant trainer hours during the preceding three years.
- Third consecutive renewal: If reached after nine years of continuous, consecutive renewal, you become field-exam exempt outright - but you must still submit an application and payment; exemption from testing is not exemption from the renewal process itself.
This structure means the credential is designed to track people who are actually doing the work, not just people who accumulate classroom hours. Full procedural detail lives in BPI's official renewal documentation, linked below, and general eligibility questions are addressed further in ALCI Requirements 2026: Eligibility, Prerequisites & How to Qualify.
A Realistic Preparation Timeline
Given that ALCI's assessment is performance-based rather than a bank of memorized multiple-choice questions, a generic study calendar doesn't map cleanly onto it. What does work is sequencing your preparation around the exam's actual structure - oral judgment first, then physical technique, then combined-timing practice under the seven-hour ceiling.
Oral Command
- Drill scenario-based questions until you're consistently clearing the 90% threshold without notes
- Focus heavily on the reasoning behind non-IC fixture rules and heat-source clearances, since these reappear as gated props later
Hands-On Technique
- Physically rehearse sealing technique against mockups resembling the three gated prop scenarios
- Work through as many of the 15 nongated prop types as you can access, aiming for consistent execution above the 93% bar
Combined Timing
- Run full oral-plus-practicum simulations under the seven-hour combined ceiling to build pacing instinct
- Identify which of the 18 performance line items still cost you the most time and target them last before test day
For a more granular week-by-week study plan built specifically around ALCI's oral/practicum split, see the ALCI Study Guide 2026: How to Pass on Your First Attempt, and use our practice exams to simulate the oral question format under realistic time pressure before test day.
Frequently Asked Questions
Yes. ALC is the official abbreviation used by the Building Performance Institute, while ALCI is the commonly searched alias for the same Air Leakage Control Installer credential. This site uses both terms interchangeably to refer to one credential.
No. There is no prerequisite credential and no mandatory training course required to sit for the ALCI assessment under the current Certification Scheme Handbook.
The oral component and hands-on practicum share a combined maximum duration of seven hours; there is no separate time allowance for each part individually.
Retesting is scoped to the specific leakage points you failed, so you would not need to redemonstrate the gated props you already completed successfully.
No. CEUs do not apply to ALC renewal. Renewal instead relies on relevant practitioner or trainer hours, or eligibility for the third-renewal exemption after nine years of consecutive renewal.