In-service performance of wood claddings and windows – a Norwegian survey

IRG/WP 18-20632

L Ross Gobakken, G Alfredsen

The overall aim of the study was to strengthen the empirical data on decay frequency and in-service performance of claddings and windows in Norway. Data from a survey of claddings and windows from 38 Norwegian houses is presented. The main findings for wooden claddings: 1) predominance of decay was detected in east facing claddings, while the largest decayed areas were located on south facing claddings, 2) yellow and grey were the most used cladding coating colours and these houses also had most cases of decay damage. Yellow coloured cladding had significantly larger mean decayed areas than grey coloured cladding. The main findings for wooden windows: 1) predominance of decay was found on south facing windows. South facing windows also had significantly larger decay damage areas than east and north facing windows, 2) white and grey were the most frequently used window coating colours. Grey windows had significantly larger mean decay damage areas than white windows. Given the right execution of details and maintenance regime wooden claddings and windows can last for more than 50 years in Norway.

Keywords: cladding, coating, decay, service life, windows

Conference: 18-04-29/05-03 Johannesburg, South Africa

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