Casement Window Sashes When primarily connected with double-hung windows, window sashes are available on any sort of window which moves, such as the casement window. Treatment has to be taken with casement windows when they are open up. A substantial wind can shift casement window sashes and crack them off. https://secondaryglazing19360.ttblogs.com/15798753/sash-windows-things-to-know-before-you-buy