Sash (or hung) windows are one of the most popular window units among Canadians, with their first appearance dating back to the 17th century. These models typically consist of two sashes and a box.

Double hung windows first rose in popularity during the 1600s, when they were developed as one of the early forms of air ...

How much do sash windows cost? The average cost of replacement of a sash window is £1,300, according to our survey of suppliers, with wood frames costing more and uPVC being cheaper.