| Title |
Cause?Mechanism Cluster Analysis of Window Installation Defects in Korean Wooden Houses and Derivation of Quality Management Priorities Using FMEA |
| Authors |
Dujin Jeong ; Hyunsoo Kim |
| DOI |
https://dx.doi.org/10.6106/KJCEM.2026.27.5.079 |
| Keywords |
Wooden House; Window Defect; FMEA; Quality Management; Water Leakage; Condensation |
| Abstract |
Windows are critical components of the building envelope in wooden houses, contributing to thermal insulation, airtightness, and durability. However, defects such as water leakage, condensation, reduced airtightness, and operational failures frequently occur, leading to performance degradation and increased maintenance costs. This study analyzed 42 window installation defect cases collected from Korean wooden houses and applied Failure Mode and Effects Analysis (FMEA) to identify defect characteristics and establish preventive quality management priorities. Frequency analysis, cross-analysis, and FMEA-based risk prioritization were conducted according to defect type and primary cause. The results showed that water leakage (33.3%) and condensation (28.6%) accounted for 61.9% of all defect cases, while construction-related factors were identified as the dominant cause across all defect types. FMEA results indicated that insufficient insulation filling around window perimeters and improper installation of airtightness tapes exhibited the highest Risk Priority Number (RPN = 48), followed by WRB continuity and flashing sequence errors. The findings highlight the importance of ensuring the continuity of insulation, airtightness, and moisture-control layers and adopting performance-based verification methods for defect prevention. This study provides a practical framework for improving window installation quality and reducing defect occurrence in wooden housing construction. |