01 CAUSE
Cause hypothesis
Define occurrence conditions and competing explanations.
THE GLOBAL HOME OF LEAK ENGINEERING
Turning water intrusion into a reproducible engineering discipline.
Leak Engineering connects cause, pathway, driving force, measurement, diagnostic decision and post-repair verification—then carries that system from books and open lectures into research, education and field practice.
Explore the disciplinePartner with ACTRI
Dr. Tae Kyung Kwon
Director, ACTRI · CEO, AIRPLE
Director, ACTRI · CEO, AIRPLE
5 SCI-E papersResearch foundation
70+ patentsGranted in 5 countries
143 verificationsField measurement
32 lecturesOpen-course roadmap
A REPRODUCIBLE DISCIPLINE
From symptoms to verified resolution
A six-part diagnostic cycle makes evidence traceable and decisions explainable.
02 PATH
Pathway mapping
Trace water and vapor through materials and interfaces.
03 FORCE
Driving forces
Interpret pressure, gravity, capillarity and hygrothermal gradients.
04 MEASURE
Measurement
Record moisture, temperature, pressure and time-series evidence.
05 DECIDE
Diagnostic decision
Compare corroborating and falsifying evidence.
06 VERIFY
Post-repair verification
Repeat comparable tests to confirm resolution.
FOUNDER & AUTHOR
Dr. Tae Kyung Kwon
Engineering doctorate from Seoul National University; author of Leak Engineering; Director of ACTRI. His work connects measurement science, building environments, education and field verification.
ACTRI
Knowledge, research, education and international academic collaboration.
AIRPLE
Commercial delivery, field implementation and technology systems.
Evidence base
5 SCI-E papers, 70+ granted patents across five countries, and 143 field verifications.
BOOKS & OPEN EDUCATION
Read. Learn. Apply. Verify.
ENGLISH · AVAILABLE
LEAK ENGINEERING
Diagnostic Principles, Instrumentation, and Verification of Water Intrusion in Buildings.
KindlePaperbackKOREAN · AVAILABLE
누수공학
Building-water-intrusion diagnosis, interpretation and countermeasures. 390 pages.
BOOKKOpen lecturesOPEN GRADUATE LECTURES
Learn Leak Engineering from the source
The current lectures are presented in Korean. Caption type and English subtitle availability are controlled by per-lecture QA.
LECTURE 1 · PART 1 · PUBLICLeak Diagnosis as Measurement, Reproduction and Verification
LECTURE 1 · PART 2 · PUBLICSix Diagnostic Indicators and the Five-Step Procedure
LECTURE 2 · PART 1 · PUBLICGoverning Equations of Moisture Transport and Total Moisture Potential
LECTURE 2 · PART 2 · PUBLICEngineering Decisions for Materials, Leak Types and Diagnostic Cost
LECTURE 3 · PART 1 · FINAL CORRECTED VERSIONStructure of Indoor Water Intrusion and Diagnostic Principles
LECTURE 3 · PART 2 · FINAL CORRECTED VERSIONLeak Delay and Evidence-Based Diagnosis
LECTURE 4 · PART 1 · FINAL PUBLIC VERSIONLeak Engineering Graduate Lecture 4, Part 1
LECTURE 4 · PART 2 · FINAL PUBLIC VERSIONLeak Engineering Graduate Lecture 4, Part 2
LECTURE 5 · PART 1 · PUBLICTracer Gas Method and Hydrogen Mixture Gas
LECTURE 5 · PART 2 · PUBLICPressure-Drop Analysis and Tracer-Gas Verification
LECTURE 6 · PART 1 · PUBLICTime-Series Observation and Causal Verification
LECTURE 6 · PART 2 · PUBLICThermal Imaging, AI Hypotheses and Cross-Validation
LECTURE 7 · PART 1 · PUBLICDifferential Diagnosis of Condensation and Water Intrusion
LECTURE 7 · PART 2 · PUBLICThermal Imaging, Moisture Content and Multi-Cause Differential Diagnosis
GLOBAL PARTNERSHIPS
Build the next chapter of Leak Engineering with us
Publishers & media
Translation rights, local editing, subtitles and educational localization.
Universities & training institutes
Textbook adoption, invited lectures and joint curricula.
Research & technology partners
Joint studies, data validation, measurement systems and field programs.