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K-BLPBuilding Science

Leaks and Damp: Reading the Symptoms

Find where the water comes from before talking fixes

Start chapter 1 freeEnrol in this course
30050±0.000LANTAI KAMAR−0.020LANTAI KMKERAMIK DINDING 20×40+ PEREKAT SEMEN T.5COATING SEMEN-POLIMER 2 LAPISNAIK 300 DARI LANTAI KMPLESTER + ACI KEDAP AIRSEALANT SILICONE ANTI-JAMURDI SUDUT DINDING–LANTAIBATA MERAH ½ BATUPLESTER 2 SISIKAIN PENGUAT DI SUDUT100 + 100 MMKERAMIK 30×30 + NAT EPOXYPEREKAT SEMEN T.5SCREED MIRING 1% KE FLOOR DRAINCOATING KEDAP AIR 2 LAPISPELAT LANTAI T.120, TURUN 50FLOOR DRAIN 2 TAHAP+ PIPA PVC Ø50ILUSTRASI CONTOHBUKAN UNTUK KONSTRUKSI1K-BLPLEAKS AND DAMP: READING THE SYMPTOMSSKALA 1:5
Level
Intermediate
Lessons
17
Time
1h 50m
Rating
4.7
Learners
9.9K
Updated
Aug 2026

After this course

What you'll be able to do yourself.

Damp has many sources, and the same symptom can come from different causes. This course teaches an order of thinking: find the water, reduce it, monitor, and only then discuss repairs. Everything here is general principle, not a diagnosis, and when the damage is serious you ask an expert to inspect it.

  1. 1Follow the order of work for a damp wall without skipping steps
  2. 2Recognise stain patterns and the water sources to check
  3. 3Read the layers of a wet floor and where they break
  4. 4Work out floor falls and simple ground water pressure
  5. 5Explain basement tanking, waterstops and drainage
  6. 6Know when to stop and call an expert

Good for

  • Site architects and supervisors who often receive leak complaints
  • Drafters who draw wet areas and basements
  • Small contractors who want to explain problems to clients honestly

Best taken after

Full syllabus

Chapter by chapter, nothing hidden.

17 lessons, 1h 50m in total. Chapter 1 is open to everyone.

Chapter 1Find the water firstFreeA damp wall can still be saved if the order is right. General principle, not a diagnosis.5 lessons / 30 min
  1. A damp wall can still be saved5 min
  2. Stain patterns and sources to check5 min
  3. The language of damp on site4 min
  4. The client wants it repainted this week6 min
  5. Chapter 1 test10 min
Chapter 2Bathrooms that leak downwardsWet area leaks happen in layers you cannot see. You learn to read those layers.6 lessons / 40 min
  1. It is not the tile that leaks5 min
  2. Build up a wet area6 min
  3. Find the fault in a wet area6 min
  4. Work out falls and the flood test7 min
  5. A wet ceiling below the bathroom6 min
  6. Chapter 2 test10 min
Chapter 3Basements and water under pressureGround water does not pass by, it pushes. Tanking, waterstops and drainage work together.6 lessons / 40 min
  1. Ground water pushes5 min
  2. Work out ground water pressure7 min
  3. Build up a basement wall6 min
  4. Find the fault in a basement wall6 min
  5. Seepage at the construction joint6 min
  6. Chapter 3 test10 min

Lesson kinds

  • Concept
  • Glossary
  • Site case
  • Chapter test
  • Layer Stack
  • Spot the Fault
  • Calculate

Get a feel for it

You practise, you don't just watch.

Try it: Slide the ParameterIllustration, not for construction
30050±0.000LANTAI KAMAR−0.020LANTAI KMKERAMIK DINDING 20×40+ PEREKAT SEMEN T.5COATING SEMEN-POLIMER 2 LAPISNAIK 300 DARI LANTAI KMPLESTER + ACI KEDAP AIRSEALANT SILICONE ANTI-JAMURDI SUDUT DINDING–LANTAIBATA MERAH ½ BATUPLESTER 2 SISIKAIN PENGUAT DI SUDUT100 + 100 MMKERAMIK 30×30 + NAT EPOXYPEREKAT SEMEN T.5SCREED MIRING 1% KE FLOOR DRAINCOATING KEDAP AIR 2 LAPISPELAT LANTAI T.120, TURUN 50FLOOR DRAIN 2 TAHAP+ PIPA PVC Ø50

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

Enough for the dry side of a bathroom. Walls in the shower zone usually need to go much higher.

Illustration, not for construction

Your creator

Taught by someone who still does the work.

Your creator

Sekar Anindita

Site architect

A practitioner who teaches from their everyday work.

Courses
4
Learners
40.6K

Other courses

About becoming a creator

Learner reviews

From people who took it.

4.7out of 5

840 reviews

  • 572%
  • 420%
  • 36%
  • 21%
  • 11%

  • Nadia Kusuma

    Interior architect

    The failure cases were the most useful part. Now I know what to ask my senior.

  • Dimas Prakoso

    Architecture student, final year

    I used to memorise terms without knowing why. After the moisture chapter I finally understood why the wall at my parents' house keeps peeling.

  • Intan Permatasari

    Civil engineering student

    The explanations start from what happens on site, not from a formula. My lecture notes finally make sense.

Questions that come up

About this course.

All questions

01

What can I try for free?

All of chapter 1, "Find the water first": 5 lessons, about 30 min. No card needed. If it isn't for you, stop there.

02

What should I know before starting?

It helps to have finished Everyday Building Science 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 Rp289.000 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 Building Science, Site Supervisor. 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
  • ibsFlagship

    Building Science / Beginner

    Everyday Building Science

    Why concrete gets watered, walls turn damp and flat roofs leak

    Nara Wijayakusuma
    Lessons
    27
    Time
    2h 45m
    Rating
    4.9
    Learners
    38.4K
K-BLPStart with chapter 1

Leaks and Damp: Reading the Symptoms free.

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

Start chapter 1 freeSee plans, Rp149.000