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IDEN
K-DATCore Details

Roof and Parapet Details

Roof edges that stay dry, from the sheet to the site.

Start chapter 1 freeEnrol in this course
6515065300408+12.450A.P. ATAP+13.350PUNCAK PARAPETTOPI PARAPET BETON PRACETAKMIRING 10% KE ARAH ATAPSTEK Ø10-600 KE DINDINGDINDING PARAPET BETON T.150COR MONOLIT DENGAN PELATCOUNTER FLASHING ALUMINIUM T.1+ SEKRUP & SEALANT PUMEMBRAN BAKAR 4MM NAIK 300MMDARI PERMUKAAN FINISH ATAPPLESTER PELINDUNG + KAWAT AYAMFILLET SPESI 50×50 +LAPIS PENGUAT MEMBRANSCREED PELINDUNG T.50, NAT @3MINSULASI XPS T.50MEMBRAN BAKAR 4MMSCREED MIRING MIN. 1% KE DRAINPELAT ATAP BETON T.120ALUR TETESAN 8×8PLESTER + ACI +CAT EKSTERIORBALOK TEPI 250×500BATA RINGAN T.150ILUSTRASI CONTOHBUKAN UNTUK KONSTRUKSI1K-DATROOF AND PARAPET DETAILSSKALA 1:10
Level
Beginner
Lessons
28
Time
2h 55m
Rating
4.9
Learners
36.4K
Updated
Oct 2026

After this course

What you'll be able to do yourself.

Flat roofs rarely leak in the middle. Leaks almost always start at the edge: the parapet corner, the membrane end and the drain. In this course you take those details apart layer by layer, then draw them, work out their levels and learn what to check on site.

  1. 1Stack a flat roof build-up in the right order and explain what each layer does.
  2. 2Draw a parapet with the right upstand, fillet and membrane termination.
  3. 3Choose between a reglet and counter flashing for the wall and the job.
  4. 4Detail copings and lightweight block parapets that do not leak from the top.
  5. 5Work out the membrane top level, sloped screed thickness and roof rain flow.
  6. 6Read and check a roof drain detail, including sump, clamping ring and overflow.

Good for

  • Drafters starting to be trusted with roof details.
  • Architecture and civil students who want to know why flat roofs leak.
  • Site supervisors who need to know the critical points before the membrane is covered.

Best taken after

Full syllabus

Chapter by chapter, nothing hidden.

28 lessons, 2h 55m in total. Chapter 1 is open to everyone.

Chapter 1Why flat roofs leak at the edgeFreeHow water travels, the layer order and the language used on the roof.7 lessons / 42 min
  1. Water always finds a way5 min
  2. Drawing words, roof words4 min
  3. The flat roof layer order5 min
  4. Stack the roof layers6 min
  5. Turn a parapet in 3D6 min
  6. The ceiling is wet again6 min
  7. Chapter 1 test10 min
Chapter 2Parapets: upstands and terminationsThe membrane has to rise, and it has to stop properly.7 lessons / 45 min
  1. The membrane has to rise5 min
  2. Build the parapet layer by layer6 min
  3. Reglet or counter flashing5 min
  4. Find the faults in the parapet6 min
  5. Work out the upstand and parapet height7 min
  6. The buried upstand6 min
  7. Chapter 2 test10 min
Chapter 3Copings and lightweight block parapetsWater comes from above too. A thin wall needs different treatment.7 lessons / 43 min
  1. Water from above: coping and drip5 min
  2. Words at the top of the wall4 min
  3. Lightweight block parapets5 min
  4. Slide the parapet parameters5 min
  5. Draw your own parapet8 min
  6. Stains on a new facade6 min
  7. Chapter 3 test10 min
Chapter 4Roof drains and fallsAll the layers meet at one hole. Water has to know its way out.7 lessons / 45 min
  1. Anatomy of a roof drain5 min
  2. Stack the layers at the drain6 min
  3. Falls and the way out5 min
  4. Work out falls and flow7 min
  5. Find the faults at the roof drain6 min
  6. The pond that will not leave6 min
  7. Chapter 4 test10 min

Lesson kinds

  • Concept
  • Glossary
  • Layer Stack
  • Read a model
  • Site case
  • Chapter test
  • Spot the Fault
  • Calculate
  • Slide the Parameter
  • Draw the detail

Get a feel for it

You practise, you don't just watch.

Try it: Slide the ParameterIllustration, not for construction
6515065300408+12.450A.P. ATAP+13.350PUNCAK PARAPETTOPI PARAPET BETON PRACETAKMIRING 10% KE ARAH ATAPSTEK Ø10-600 KE DINDINGDINDING PARAPET BETON T.150COR MONOLIT DENGAN PELATCOUNTER FLASHING ALUMINIUM T.1+ SEKRUP & SEALANT PUMEMBRAN BAKAR 4MM NAIK 300MMDARI PERMUKAAN FINISH ATAPPLESTER PELINDUNG + KAWAT AYAMFILLET SPESI 50×50 +LAPIS PENGUAT MEMBRANSCREED PELINDUNG T.50, NAT @3MINSULASI XPS T.50MEMBRAN BAKAR 4MMSCREED MIRING MIN. 1% KE DRAINPELAT ATAP BETON T.120ALUR TETESAN 8×8PLESTER + ACI +CAT EKSTERIORBALOK TEPI 250×500BATA RINGAN T.150

Slide the value. The drawing follows, just like in the lessons.

The membrane ends above ponding level. A common rule of thumb: at least 150 to 200 mm above the roof finish.

Illustration, not for construction

Your creator

Taught by someone who still does the work.

Your creator

Nara Wijayakusuma

Architect, 12 years in practice

Teaches details the way studios use them: start from the problem on site, then down to the drawing.

Courses
5
Learners
110.1K

Other courses

About becoming a creator

Learner reviews

From people who took it.

4.9out of 5

3.2K reviews

  • 590%
  • 47%
  • 32%
  • 21%
  • 10%

  • Bagas Wicaksono

    Junior quantity surveyor

    Layer Stack made the waterproofing build-up stick in my head. It lands better than watching a video.

  • Salsa Rahmadani

    Junior drafter

    I once got a complaint about a leak in a second-floor toilet. Now I know which point to check first.

  • Rizal Maulana

    Site supervisor

    The parapet detail is simple but right on target. My senior asked where I learned it.

Questions that come up

About this course.

All questions

01

What can I try for free?

All of chapter 1, "Why flat roofs leak at the edge": 7 lessons, about 42 min. No card needed. If it isn't for you, stop there.

02

What should I know before starting?

It helps to have finished Reading Working Drawings from Zero first. It isn't locked, but the chapters assume you know that material.

03

Subscribe or buy this course?

Pro is Rp149.000 a month and opens every course, track, exam and certificate. Buying this course is Rp329.000 once and it stays yours. If you plan to take more than two courses, Pro usually comes out cheaper.

04

Do I get a certificate?

Certificates come from track exams, not single courses. This course counts toward Core Details, Studio-Ready Drafter, Junior Architect. The exam runs 60 minutes and you pass at 75 percent.

05

Can I use these drawings on a project?

No. Every drawing in the course is an illustration for learning, not for construction. Use them to understand the logic, then follow your firm's standard and your engineer's drawings.

Part of

This course counts toward these tracks.

Where next

Courses people often take next.

All courses
  • 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
K-DATStart with chapter 1

Roof and Parapet Details free.

No card needed. If it suits you, go on with Pro or buy this course.

Start chapter 1 freeSee plans, Rp149.000