For inspectors taking the ICC B1 Residential Building Inspector exam
ICC B1: find it in the IRC before time's up
Free ICC B1 practice: 10 questions, answers explained as you go, score by domain.
Full course $99: 426 practice questions, each explained. See the course
Terms and refunds · Secure checkout by Stripe · Billed by Nori Software
Public Safety and Special Construction
In a new bedroom, the only emergency escape window has a keyed sash lock, with the key hanging on a hook beside the window. What should the inspector do?
Press A-D or 1-4 to choose an answer while this question is on screen.
Choose an answer to begin
The B1 is open book, so finding it fast in the code is the skill. Practice in the 2024 IRC with the free 10-question check, explained as you answer it.
- No signup · No card
- Written to the ICC B1 outline
- Written to IRC (2024 edition); ICC also offers a 2021 B1
- Paid to ICC, not us ICC exam fee $320 (catalog price)
- 10 questions, untimed
- Answers explained as you go
- Scored by domain
Want a timed run? Try the free 25-question mini-mock. The first 5 need no email.
Every question is original and written to International Code Council's published content outline.
References you can bring
The B1 is open book. These are ICC's rules as we read them; confirm them with ICC before you book.
- Code book
- The International Residential Code (IRC) for the edition you book. ICC lists the B1 on the 2021 and 2024 editions. ICC says hardcopy books are allowed, and any copyrighted, bound book may be used at a test site.
- Open book
- Yes. You may look things up in the IRC during the exam.
- Tabs
- Allowed if they are permanently attached, meaning a tab cannot be removed without destroying the page. Notes must be written in ink or highlighted, in a bound reference.
- Not allowed
- Photocopies of copyrighted material and loose papers.
Checked . Sources: ICC B1 content outline, ICC national exams list, ICC test-site rules, ICC hardcopy books. See our IRC tab list.
How it works
- Answer 10 questions, freeUntimed. Check each answer to see why it's right, with a hint where one helps.
- See your score by domainBroken down by outline domain, with your weakest one named.
- Study what you missedAdd your email and exam date for a study plan, or practice at exam pace.
Want exam pace? Take the 25-question practice test (about 50 minutes)
The ICC B1 course
Available now · instant accessLearn how the IRC is laid out, drill finding sections fast, then practice. Written for the 2024 IRC.
- 7modules of lessonsEvery task on the outline
- 4full-length timed exams60 questions in 120 minutes each
- 426practice questionsEach one explained
- 4worked calculationsStep by step
- 8timed code lookups a setFind it fast in IRC, with your median time
- 1week-by-week study planSet to your exam date
Plumb, your AI study assistant, comes with the ICC B1 course: a week-by-week plan from your exam date and weak areas, step-by-step walk-throughs and a weak-spot quiz. Up to 40 messages a day.
- My study plan: a week-by-week course from your exam date and weak areas, with today's set ready. Lose a week and I re-plan it
- Stuck on a question? Tap Walk me through it, Explain like I'm new or Show a worked example
- A quiz on your weak spots, your misses back on a spaced review, and explain it back to me to lock it in
- After 30 answers, I show you the patterns in your misses and a practice set for each one
- Exam week: a day-by-day plan for your last 7 days
See all 7 modules
- How the IRC works and how an inspector uses it
- Planning: separations, siting and room sizes
- Footings and foundations
- Floors, slabs and crawl spaces
- Walls: framing, bracing, masonry and coverings
- Roofs, attics and chimneys
- Life safety: egress, stairs, alarms and glazing
Instant access. Terms and refunds · Secure checkout by Stripe · Billed by Nori Software
- B1 practice pack only$49
Terms and refunds · Secure checkout by Stripe · Billed by Nori Software
- Free sample lessonFree
- Question of the dayFree
Look inside the course
The real course screens you get after checkout, shown here with sample questions and answers.
Timed exam with flagsA countdown clock, a flag button on every question and a navigator that shows what you answered and flagged. Review every missAfter the exam, open any question you missed to see your choice, the correct answer, why, and the IRC section to read. Readiness by domainEach domain rated from your own answers, with a one-click drill where you need work.
Every answer comes with a full explanation.
Also free
AI study assistant
Ask Plumb why an answer is right
AI study assistant
Plumb AI
Plumb is your AI study assistant. Answer a question, then ask Plumb why.
Example
Why is that one wrong?
PlumbI'll show you why the right answer works, why each other option falls short, and where to look it up.
Example of how I explain. Answer question 1, then tap Ask Plumb why. 3 free asks, 10 more with your email. I'm AI, so check important details against your references. Meet Plumb
Exam at a glance
- Format
- 60 questions in 120 minutesBook: open
- Exam fee (paid to ICC, not us)
- 320 (catalog price; ICC says members get discounted exam pricing but the catalog does not show the member price)
- Retakes
- National exams: up to 6 attempts in 6 months, fee per attempt (ICC PRONTO page)
What it covers
The free 10-question check follows these domains, subject to the available practice questions.
Free check FAQ
How long is the free 10-question check?
The free check has 10 questions, is untimed and takes about 20 minutes. You see the answer and explanation after each question. It is a short study check, rather than a full-length exam simulation. Want exam pace? The 25-question practice test is also free. You can pause it, and it saves your place.
Is this an ICC Residential Building Inspector practice exam?
Yes. This short check is for Residential Building Inspector B1 preparation, rather than other ICC certifications or a full exam simulation. The B1 is open book, so practice finding answers in your own IRC. Check your selected code cycle before studying and use your own licensed IRC copy. We do not reproduce code text or tables.
Is the 10-question check free?
Yes. You can start the check and see your score and weakest domain for free, with no signup or payment. Your score in each domain unlocks when you add your email.
Where does the practice content come from?
Every question is original and written to the published outline. Treat the results as a starting point for study.
How is the check scored?
Practice items are grouped by the published outline's domains, subject to available questions. The check weights domain results using the configured published outline weights. This practice percentage helps set study priorities; it does not predict your exam score or certification outcome.
What do I see after finishing?
You get your score, your weakest domain and what the ICC B1 course holds for it. Add your email to see your score in each domain and get a free study plan.
How should I use the result to study?
Start with your weakest domain. The ICC B1 course has lessons, explained practice questions and timed exams on it. Want to test your pace first? Take the free 25-question practice test.
The Rafter Tie app for iPhone and AndroidToday's questions and your study plan in your pocket. Rafter Tie already works in your phone's browser today.
See it on your phoneMore free help
- ICC B1 exam guideFormat, domains, references and published sources in one page
- Free sample lesson
- Free flashcards
- Question of the day
- Print the study checklist (free PDF)Topics to cover, on one printable page. No email.
- Print a class quiz (free PDF)5 practice questions with an answer key on page 2.
- Print the flashcards as cut-out cards (free PDF)The free flashcard sample, ready to cut and carry.
- ICC B1 lookup drill: find the 2024 IRC section on a clockFree tool
- ICC B1 study plan builder: your exam dateFree tool
- Which ICC inspector exam? B1, B2 or R5Free tool
- ICC B2 free 10-question check
- ICC R3 free 10-question check
Add this check to your site
Give your students or members the free 10-question ICC B1 check on your own page. Copy this HTML with its attribution link. Scores open in a new tab on Rafter Tie. Paste both lines; if your site strips scripts, the frame keeps a fixed height.