- IL-ROOF is the Illinois Residential, Commercial and Industrial Roofing Examination administered by Continental Testing Services for IDFPR.
- The exam has 130 multiple-choice questions in 150 minutes; you need a score of 70 or higher to pass.
- Steep-Slope Roofing Systems carries 35 questions, the largest single domain weight of the six.
- The CTS exam fee is $248, separate from the $125 IDFPR business-license application.
What Is A IL-ROOF, Exactly?
IL-ROOF refers to the Illinois Roofing Contractor License Exam - specifically the Illinois Residential, Commercial and Industrial Roofing Examination administered under profession 105, test 03. This is the state's unlimited-license path, meaning a candidate who passes it can legally pursue residential, commercial, and industrial roofing work under one credential, rather than needing separate approvals for each category.
The exam exists because Illinois requires roofing contractors to demonstrate competency before the Illinois Department of Financial and Professional Regulation (IDFPR) will issue a business license to operate as a roofing contractor in the state. It is not a voluntary industry certificate - it is a regulatory licensing exam tied directly to legal permission to bid and perform roofing work.
For a deeper breakdown of terminology and how the acronym is used across the industry, see IL-ROOF Meaning and What Does IL-ROOF Stand For?.
Who Administers the IL-ROOF Exam?
Two organizations govern the process. The Illinois Department of Financial and Professional Regulation (IDFPR) is the state agency that ultimately issues the roofing contractor business license. Continental Testing Services (CTS) is the third-party testing vendor that develops, schedules, and scores the actual examination.
This split matters practically: CTS handles your exam registration, seat scheduling, and score reporting, while IDFPR handles the separate business-license application, insurance verification, and bonding review. Passing the CTS exam is a prerequisite, not the finish line - more on that in the section on what happens after you pass.
If you're trying to distinguish IL-ROOF from other similarly-abbreviated credentials in unrelated industries, see What Is IL-ROOF? and IL-ROOF Certification for clarification on scope.
Exam Format and Question Style
The IL-ROOF exam is a closed-book, multiple-choice test. Candidates face 130 questions in 150 minutes, and a raw score of 70 or higher is required to pass. There is no essay, no hands-on demonstration, and no oral component - it is a written knowledge test administered at a CTS testing center.
Materials permitted in the testing room are limited and specific:
- Two No. 2 pencils (bring your own - do not assume they're provided)
- A non-programmable, non-printing solar- or battery-powered calculator
Nothing else is authorized. No reference books, no phones, no notes. The exam draws heavily on the CTS study guide (currently dated May 2021), which references NRCA roofing, safety, waterproofing, and repair materials; roofing estimating practices; NASCLA business fundamentals; and Illinois-specific law and administrative rules. For a full walkthrough of exactly what to expect on test day, see How Hard Is the IL-ROOF Exam? Complete Difficulty Guide 2026.
Key Takeaway
Because calculators must be non-programmable and non-printing, do not bring a phone calculator app or a graphing calculator - it will be confiscated or you'll be asked to leave it outside the room.
The Six Content Domains
CTS structures the IL-ROOF exam around six weighted content domains. Understanding the exact item counts per domain is the single most useful thing you can do before building a study plan, because it tells you where your time is worth the most.
| Domain | Question Count |
|---|---|
| Steep-Slope Roofing Systems | 35 |
| Safety & Employee Protection | 25 |
| Roofing Preparation & Materials | 20 |
| Rules, Regulations & Business Practices | 20 |
| Low-Slope Roofing Systems | 15 |
| Non-Residential Roofing Systems | 15 |
Notice that Steep-Slope Roofing Systems and Safety & Employee Protection together account for 60 of the 130 questions - nearly half the exam. That is not a coincidence; it reflects how much of real-world Illinois roofing work involves sloped residential systems and jobsite safety compliance.
Domain 3: Steep-Slope Roofing Systems (35 questions)
The largest domain on the exam. Expect detailed questions on shingle, tile, slate, and metal roofing installation, flashing details, ventilation, and manufacturer installation standards for pitched roofs.
- Underlayment and ice-dam protection requirements
- Flashing details at valleys, chimneys, and penetrations
- Attic and roof ventilation calculations
Domain 1: Safety & Employee Protection (25 questions)
The second-largest domain. Covers fall protection, ladder safety, scaffolding, and general jobsite hazard awareness relevant to roofing crews.
- Fall-arrest and guardrail systems
- Ladder setup and load limits
- Employee protection responsibilities of the contractor
The remaining four domains - Roofing Preparation & Materials, Rules Regulations & Business Practices, Low-Slope Roofing Systems, and Non-Residential Roofing Systems - round out the test with 20, 20, 15, and 15 questions respectively. For an in-depth breakdown of all six domains including specific subtopics and terminology, see IL-ROOF Exam Domains 2026: Complete Guide to All 6 Content Areas.
Registration, Fees, and Deadlines
Registering for the IL-ROOF exam involves working through Continental Testing Services directly rather than IDFPR. The current CTS exam fee is $248, and this is separate from the IDFPR business-license application fee of $125. Candidates commonly underestimate total cost by forgetting these are two distinct payments to two distinct entities.
CTS offers testing at locations including Hillside and Springfield. As an example of the scheduling rhythm, the November 4, 2026 examination carries an October 7, 2026 registration deadline - roughly four weeks of lead time. Missing a registration window typically means waiting for the next scheduled sitting, so plan around your target date early.
For the complete fee breakdown, including how the surety bond and insurance requirements factor into total cost of entry, see IL-ROOF Certification Cost 2026: Complete Pricing Breakdown. For every upcoming testing window and deadline pattern, check IL-ROOF Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
What Happens After You Pass
Passing the CTS exam with a score of 70 or above is a major milestone, but it is not the same as holding a license. IDFPR requires a separate license application supported by entity documentation, proof of insurance, and bonding records before a roofing contractor business license is actually issued.
The specific financial requirements for unlimited licensure are substantial:
- A $25,000 continuous surety bond - this refers to the bond's face amount, not its premium cost
- At least $250,000 in property-damage coverage per occurrence
- At least $500,000 in personal-injury/bodily-harm coverage per occurrence
- Applicable employment coverage for any workers
There is also a designated responsible qualifying party concept built into the license structure. This individual is the one who actually sits the examination on behalf of the business, and they must be authorized to supervise installation work and participate in the company's day-to-day operations - not a figurehead name on paperwork.
Key Takeaway
Once licensed, remember that licenses expire December 31 of odd-numbered years (next expiration December 31, 2027), with renewal at $62.50 per year or $125 for the standard two-year cycle, contingent on maintained insurance, bonding, and qualifying-party status.
For the exact numeric passing threshold and how CTS calculates your result, read IL-ROOF Passing Score 2026: Exactly What You Need to Pass. For the full prerequisite checklist before you even schedule your seat, see IL-ROOF Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Who Actually Needs This License?
Anyone who wants to legally operate a roofing contracting business in Illinois - bidding jobs, signing contracts, and directing crews under a business name - needs a licensed responsible qualifying party who has passed this exam. This includes:
- Independent roofers starting their own contracting business
- Employees being designated as the qualifying party for an existing roofing company
- Contractors expanding from residential-only work into commercial or industrial projects
- General contractors who want in-house roofing licensure rather than subcontracting every job
This is different from a roofing certification you might pursue voluntarily to build a resume. IL-ROOF licensure is a legal gate to operating in the state, which is why job postings for supervisory and ownership-track roofing roles in Illinois often explicitly reference it. See IL-ROOF Jobs for how this plays out in hiring, and Is the IL-ROOF Certification Worth It? Complete ROI Analysis 2026 for a broader look at career impact.
Building an IL-ROOF-Specific Study Plan
Generic study advice - flashcards, spaced repetition, timed practice - only helps if it's mapped to the actual domain weights above. A candidate who spends equal time on all six domains is misallocating effort, since Steep-Slope Roofing Systems and Safety & Employee Protection together make up nearly half the test.
Steep-Slope & Safety Fundamentals
- Work through steep-slope installation standards, flashing, and ventilation first - this is your highest-weight domain
- Pair it with fall protection and jobsite safety rules since both domains draw on overlapping OSHA-style content
Materials, Business Practices, and Illinois Law
- Study roofing preparation and materials alongside NASCLA business fundamentals
- Review Illinois administrative rules and licensing regulations specific to contractors
Low-Slope and Non-Residential Systems
- Cover the two smallest-weight domains last, since they carry fewer points but still require accuracy
- Run full-length timed practice sets to simulate the 150-minute, 130-question format
If you want a condensed reference for last-minute review, use IL-ROOF Cheat Sheet 2026: One-Page Review of Must-Know Facts, and for a structured week-by-week guide built entirely around this exam's material, see IL-ROOF Study Guide 2026: How to Pass on Your First Attempt. You can also run full-length timed simulations on our practice test platform to get comfortable with the pacing before test day.
Frequently Asked Questions
IL-ROOF refers to the Illinois Roofing Contractor License Exam, specifically the Illinois Residential, Commercial and Industrial Roofing Examination administered by Continental Testing Services for IDFPR.
The exam has 130 multiple-choice questions, and candidates are given 150 minutes to complete it. A score of 70 or higher is required to pass.
No. Passing the CTS examination is a prerequisite, but you must still submit a separate IDFPR business-license application along with entity, insurance, and bonding documentation before a license is issued.
The CTS exam fee is $248. The IDFPR business-license application is a separate $125 fee. Additional costs include the required $25,000 surety bond and liability insurance coverage.
Steep-Slope Roofing Systems, worth 35 of the 130 questions, is the largest domain and should get the most study time, followed by Safety & Employee Protection at 25 questions.