As a result to check basic physical characteristics of plyood and fabric board, both of them satisfied the criteria of KS F 3126 but hardened fabric board only showed changes in the absorption width expansion rate. This may imply that continuous expansion and swelling can occur if hardened fabric board is exposed to moisture for longtime, and it should be considered when selecting a product and mainteaning it.

• 박철우(이즈원산업 부설연구소장, 공학박사) | Park, Cheul Woo
• 임남기(동명대학교 건축공학과 교수, 공학박사) | Lim, Nam Gi