They're preferred with those keen to keep the traditional glance of wood on the inside and also are extremely sturdy and small-maintenance.  The sash cord attaches the window sash to the counterweight concealed inside the window body. This produces a equilibrium that allows for clean vertical motion, enabling the window https://cashuqnjb.blogspothub.com/34837786/indicators-on-sash-window-draught-proofing-you-should-know