datFlagship
Core Details / Beginner
Roof and Parapet Details
Roof edges that stay dry, from the sheet to the site.
Nara Wijayakusuma
- Lessons
- 28
- Time
- 2h 55m
- Rating
- 4.9
- Learners
- 36.4K
J-DETSkill track
Courses
5
Lessons
100
Material
10h 38m
Pace
5 weeks at 20 minutes a day
Result
Core Details Certificate
Track route
From foundation to roof.
Every floor stands on the one before it. Its height matches the length of its course, so you can see which part is heaviest.
- Roof: track exam
Core Details Certificate
40 questions, 60 minutes, pass at 75 percent.
Start here
By the end you'll be able to
- 1Stack a flat roof build-up in the right order and explain what each layer does.
- 2Stack a wet floor from slab to tile.
- 3Calculate water pressure on walls and uplift under the raft.
- 4Detail a sill with fall, projection and drip groove.
- 5Explain why small differences between risers are dangerous.
In this track
Courses in this track.
Chapter 1 of every course is free. With Pro, everything opens and your progress counts toward the track.
1
2
3
4
5
- dbs
Core Details / Intermediate
Wet Area Details
Bathrooms that do not drip onto the ceiling below.
Nara Wijayakusuma- Lessons
- 18
- Time
- 1h 58m
- Rating
- 4.8
- Learners
- 12.8K
- dbm
Core Details / Advanced
Basement and Below-Grade Wall Details
Below-grade walls against water that never takes a day off.
Sekar Anindita- Lessons
- 18
- Time
- 1h 55m
- Rating
- 4.7
- Learners
- 6.2K
- dbk
Core Details / Intermediate
Opening Details: Windows, Sills, Curtain Wall
Windows and glass facades that stay dry, neat and safe.
Nara Wijayakusuma- Lessons
- 18
- Time
- 1h 55m
- Rating
- 4.7
- Learners
- 9.8K
- dtg
Core Details / Beginner
Stair Details
The one centimetre between a safe stair and a trip hazard.
Yudha Pranaja- Lessons
- 18
- Time
- 1h 55m
- Rating
- 4.8
- Learners
- 14.4K
Exam and certificate
What you take home.
A numbered certificate in your name that you can download and share. It isn't a professional competency certificate, but it's proof you can show.
Time
60 minutes
Questions
40
Pass mark
75 percent
Retake
7 days later
- 1Work through every course in this track.
- 2Take the exam when you're ready, there's no timetable.
- 3Pass, and the certificate appears in your account.
AcademyCertificate of completion
Awarded to
Laras Kinanti
who passed the timed track exam and completed every course in
Core Details Certificate
Nara Wijayakusuma
Chief examiner
- Number
- DA-DET-2026-04817
- Exam
- 40 questions, 60 min
- Score
- 86 / 100
- Date
- 14 October 2026
Questions that come up
About exams and certificates.
01What's the difference between a skill track and a career track?
A skill track covers one subject end to end, such as Core Details, and closes with an exam and a certificate. A career track pulls courses from several subjects in the order one role needs them, such as Studio-Ready Drafter.
02What is the track exam like?
40 questions in 60 minutes: multiple choice, calculations and reading drawings. You pass at 75 percent. The clock keeps running once you start, so set aside a quiet hour.
03What if I don't pass?
You can retake it after 7 days. Your results show which parts are weak, so use the time to redo those chapters.
04What does the certificate count as?
It's proof you passed a Detarva Academy track exam. It isn't a professional competency certificate or a licence to practise. Many people use it in their portfolio when applying, and how much it counts is up to the employer.
05Can I share it online or print it?
Yes. Each certificate has its own number and can be downloaded as a PDF or shared through a link.
J-DETThe first floor is free
Start on floor one.
Chapter 1 of each course is open to you. Go on with Pro if it suits you.