This timber sliding sash window with a glazing bar brings the detail of a true period window to your home. The vertical astragal sash bar divides each sash into elegant panes, giving the authentic look found on Victorian and Edwardian terraced houses. Built as a traditional box sash on weights and made to order in the UK, prices start from £449+VAT.

Vertical glazing bars that match a period façade

The defining feature of this window is its vertical glazing bar. Rather than one flat pane of glass, each sash carries a slim astragal sash bar that splits the glazing into balanced sections — the classic detail buyers search for when they look for a sash window with a glazing bar. It suits conservation areas and older properties where a plain modern sash would look out of place, yet it still takes a sealed double-glazed unit behind the timber bar, so you keep the period look without losing performance.

A traditional box sash on weights

Both sashes run on a counterbalanced weight system hidden inside the timber box frame. This is the original sliding sash mechanism, and it lets the top and bottom sashes glide smoothly and hold at any height. Because it uses cast weights rather than springs, the action stays reliable for decades and feels true to a genuine period window. Explore our full range of timber sash windows on weights, or choose from engineered pine, softwood or hardwood such as meranti and oak, with energy-saving glass rated at a U-value of 1.4 W/m²K to meet current Building Regulations.

• Vertical astragal glazing bar that recreates an authentic period sash window look.
• Traditional box sash on weights — smooth sliding action that holds at any height.
• Energy-saving glass with a U-value of 1.4 W/m²K, certified to Building Regulations.
• Warm Edge Spacer Technology to improve insulation and reduce condensation.
• Decorative horns and a flush-to-frame hardwood sill for an accurate finish.
• Choice of engineered pine, meranti or oak timber.
• Finished in any RAL or Farrow & Ball colour using a 7-step painting process.
• Fully draught-sealed with a complete set of standard ironmongery.

Frequently asked questions

What is a glazing bar on a sash window?

A glazing bar, also called a sash bar or astragal bar, is the slim timber moulding that divides a sash into smaller panes. On this window the glazing bar runs vertically, creating the traditional divided look seen on period homes while still sitting over a single sealed glazed unit.

How much do timber sliding sash windows with glazing bars cost?

This sliding sash window on weights with a glazing bar starts from £449+VAT. The final price depends on size, your choice of timber, glazing and colour. Request a quote and we will price your exact specification.

Are these sash windows on weights or springs?

This model uses the traditional weights system — counterbalanced cast weights concealed inside the timber box frame. It is the authentic box sash mechanism for period properties. We also offer sliding sash windows on hidden springs if you prefer a slimmer frame.

Can I choose hardwood or softwood?

Yes. You can choose engineered softwood (pine) for a cost-effective option, or hardwood such as meranti or oak for greater durability. All timber is fully finished and draught-sealed before delivery across the UK.