The counterweight and pulley system is commonly present in traditional picket sash windows. A counterweight, ordinarily made of direct or steel, balances the weight from the sash, decreasing the effort necessary to raise or reduce the window. Windows can usually be locked ajar, this means you might have an open https://johnathanfggee.blogdigy.com/how-much-you-need-to-expect-you-ll-pay-for-a-good-sash-window-draught-proofing-53702816