Deterioration in use

• Eg. Weathering , fire , fungi (dry and wet rot ) , insect (termite , bettle , marine borer , wasps ) .
• Final application 
• example door panels may split on drying if assembled and glued at high moisture content . 
• Example . Veneered dooors should be of same veneer each side to avoid bowing by differential shrinkage or movement .
• Without proper protection to moisture when timber is in use -may result in fungi and insect attack .