What C-9 covers
Drywall — scope of work.
Installation and finishing of gypsum board, including framing, hanging, taping, mudding, and texture.
Fastest. No time wasted. Pass in a single day.
C-9 Drywall exam prep. The fastest specialty crash course on the internet.
Any experience level, License ready in a day. Know every answer in the C-9 Drywall exam. Made for your phone.
One-time payment · 1-year access · Pass your first try, or it's free
Why us
Fastest. No time wasted. Pass in a single day.
Pass first try, or it's free
Finish your prep, sit the real CSLB exam, and if you don't pass we refund you in full.
Do all the prep in your Exam Pass Kit and take the real exam. Don't pass? Submit your results and we start your refund within 24 hours — no questions asked. We bet on the material so you don't have to.
Fastest path to pass
Pass-ready in a single day: the full 1000+ question bank, 6–10 hours for any license — Law & Business or any trade exam.
An AI-built crash course that walks you straight to the answer. No filler videos, no "30 minutes a day for two weeks" — sit down once, finish your Exam Pass Kit, walk into PSI. Our users go from zero to passing in a single afternoon.
Any skill level
Brand-new apprentice or 30-year journeyman — same crash course, same single day.
The AI meets you where you are and only spends time on what you actually need. No live classes, no enrollment windows. Open it on the truck, on lunch, on the couch — we save your spot.
Everything a contractor needs
Full practice question bank, full-length mocks, printable cheat sheets, and step-by-step guidance.
AI crash-course question bank, blueprint-matched 115-question timed mocks, single-page cheat sheets you can print and bring to the truck, and walk-through guidance from application to test day.
Any classification
Law & Business, B General Building, and every C-class trade.
One product covers every CSLB classification. The Smartest Pick — All Licenses bundle also includes every other state’s Law & Business exam as we roll them out (TX, FL, NV, AZ next).
What you get
Everything a contractor actually needs.
Practice exams, printable cheat sheets, plain-English guidance, and a study plan that adapts to you — all in one product, at your own pace.
AI crash-course question bank
AI-prioritized drilling per topic. The system tracks your accuracy and only spends time where you actually need it — no filler.
Learn more →Full-length timed practice exams
115 questions, 3.5 hours, blueprint-matched to the real CSLB exam. As many attempts as you want.
Learn more →Printable cheat sheets
One-page references for measurements, conversions, codes, and trade-specific formulas. Print on 9×16 and bring them anywhere.
Learn more →Step-by-step guidance
Plain-English walk-through from picking your classification to fingerprinting, scheduling, and test day.
Learn more →One-sitting crash course
Sit down once, finish your Exam Pass Kit, walk into PSI. No live classes, no cohort start dates — and if you do step away, we save your spot.
Learn more →Mobile-first
Built for phones first. Practice on the job site, on lunch, in the truck — not at a desktop.
Learn more →
High-yield study topics
What the C-9 exam actually tests.
The CSLB does not publish a verbatim question list. They publish a blueprint and reference materials, and the exam samples within that blueprint. The topics below cover the bulk of what most candidates miss on their first attempt — they are where the AmericasMarket AI crash course spends most of your time.
- Stud spacing, screw schedule, and fire-rated assemblies
- Joint compound types and finishing levels (0–5)
- Bead types: corner, J-bead, control joints
- Sound assemblies (STC ratings)
- Texture spraying and matching repairs
Reference materials
Codes and study guides we paraphrase from.
All C-9 questions on AmericasMarket are written by licensed California contractors and paraphrased from public reference materials — never copied verbatim from any exam. The authoritative sources for C-9:
- ASTM C840
- GA-216
- CSLB C-9 Study Guide
Who this is for
Is C-9 the right classification for you?
Drywall hangers and tapers moving up. If your day-to-day work matches the scope above, C-9 is your classification. If you also bid work outside the scope, you may need a B General Building license or an additional C-class on the same license.
Study plan
How to pass the C-9 exam fast.
Block off a day. The AI crash course gets C-9 candidates pass-ready in 6–10 hours — a single day — across the full question bank, diagnosing your weak topics in the first few minutes and routing the rest of your time straight at them. When it says "you are pass-ready," take one full-length timed mock as a sanity check, then walk into PSI. Law & Business is the same — a single day if you are taking it too. Total: a single day, one sitting. The Smartest Pick — All Licenses bundle includes Law & Business and every 115-question mock for every classification.
FAQ
Frequently asked
How hard is the C-9 Drywall CSLB exam?
Most candidates pass on the first attempt after a single day of the AmericasMarket AI crash course (6–10 hours of course time across the full C-9 trade-exam question bank). The trade exam itself is about 115 questions, 210 minutes, with 73% required to pass.
What's the cheapest way to study for the C-9 exam?
AmericasMarket at $499 for the single C-9 Drywall course with 1-year access, or $899 for every CSLB classification (1-year access). And it's backed by our pass-first-try-or-it's-free guarantee — a failed C-9 attempt doesn't cost you twice.
Do I need Law & Business too?
Yes — every CSLB classification requires Law & Business in addition to the trade exam. Buy it separately for $499 or get it free with the $899 bundle.
Can I take the C-9 exam without a current Drywall job?
You need four years of journey-level experience in Drywall within the last ten years, verifiable by someone who supervised you. Education or military training can substitute for up to three years.
Does AmericasMarket offer printable cheat sheets for C-9?
Yes — our Measurements & Conversions cheat sheet covers the magic numbers every trade needs, and classification-specific sheets are rolling out for the heaviest-math classifications. All cheat sheets print to a single page.
What if I fail the C-9 exam?
CSLB allows multiple retakes (small reschedule fee per attempt). Single-course access lasts a full year — plenty for at least one retake. The Smartest Pick — All Licenses bundle gives you 1-year access to every classification. And with the pass-first-try-or-it's-free guarantee, your first attempt is on us if you don't pass.
Keep reading
Related guides.
Buy C-9 Drywall ($499)
Course detail page for C-9 Drywall — checkout, syllabus, topic weights.
Read →Law & Business exam prep
Required for every CSLB classification, including C-9.
Read →Fastest way to pass — the AI crash course
Single-day crash course you can run for the C-9 exam in one day.
Read →CSLB license requirements
Experience, exams, bond, fingerprinting — the full checklist.
Read →
Ready to pass — at your own pace?
$499 for a single classification. $899 for every Exam Pass Kit we publish, 1-year access. Pass your first try, or it's free.