QUALITY ASSESSMENT OF LAMINATED WINDOW SCANTLINGS FROM MIXED TROPICAL HARDWOODS AFTER LONG-TERM EXPOSURE TO WEATHERING

Abstract

Laminated window scantlings made from mixed tropical hardwoods were finished with five coating systems and subjected to natural exposure
for a period of 54 months. Post-weathering quality assessment of the scantlings showed that in-service performance largely depended on type of the coating system, i.e. its long-term resistance to weathering. However, distinct differences in wood properties, notably density and related magnitude of movement under changing climatic conditions, are liable to adversely affect product quality once the coating loses its protective function due to physical deterioration.