Sliding Sash Windows for New Builds

Why New Builds Are Choosing Sliding Sash

It's a question we hear regularly from architects and developers: why specify a traditional sliding sash window on a brand-new property? The answer is almost always kerb appeal and resale value. A well-proportioned sash window signals quality and permanence in a way that a standard uPVC casement simply doesn't — even on a contemporary design.

This matters most on developments designed with a period-influenced elevation — Georgian-style townhouses, Victorian-inspired terraces, or infill developments sitting alongside existing period stock. Sliding sash windows let a new build sit comfortably within its streetscape rather than standing out for the wrong reasons, which can also smooth the path through planning where design officers are assessing how well a new building responds to its context.

But the appeal isn't purely aesthetic. Timber sliding sash windows resell well, appraise well, and are increasingly requested by buyers who want the traditional look without inheriting the maintenance issues of an actual period property.

Getting The Detailing Right

The difference between a new build sash window that looks authentic and one that looks like a pastiche comes down to proportion and detailing — sight lines, glazing bar widths, horn details, and the recess of the sash within the frame. We work from the same proportional principles used on our period restoration work, applied to new joinery, so the finished window reads correctly from the street.

Meeting Building Regulations

New build windows must meet current Part L thermal performance requirements, and modern sliding sash windows are built to do exactly that — slimline double-glazed sealed units, draught-sealed running channels, and factory-applied finishes all contribute to U-values that satisfy Building Control, without compromising the traditional glazing bar appearance.