
How energy efficient timber sash windows are depends a lot on a number of factors, such as age and quality. How old the windows are and when they were constructed, will play an important part in determining their energy efficiency. The development of energy-saving technology over the last few decades has meant that modern timber sash windows are far superior in terms of thermal retention and energy efficiency, compared to older units constructed at the beginning of the 20th century. Single glazed timber sash window In a study of the energy efficiency of a timber, single glazed window, Paul Walker of Glasgow Caledonian University found that the U value of … Continue reading