Improved Home Protection With one pane, sash windows can be broken quickly. Double glazing add resistance to the window. Security add-ons like tougher glass are standard. Quieter Homes with Upgraded Windows Street noise is a common problem for homes near bustling areas. Sealed units make it more peaceful inside. https://emilioifrcn.thezenweb.com/energy-efficiency-with-the-look-of-original-sash-windows-72877824