The formerly applied box or Swedish windows due to their construction with the passage of time were subject to warping, gaps appeared through which the expensive heat escaped. Equally the application of single panes in windows assured feeble thermal insulation, and the application of double windows hindered window cleaning. Because of the continually rising cost of heating, when renovating a house or flat we very frequently decide to change the windows. Also when building a new home we seek solutions, which assure good thermal and acoustic insulation without sacrificing aesthetic values. The single frame windows, which we produce in the DJ68 and DJ78 system are such a solution.
