Historic Wooden Sliding Sash Windows

The sliding sash window is a classic design with enduring appeal. Yet anyone with first-hand experience of an ageing, stiff and draughty original will be familiar with its potential drawbacks.

Based on the traditional box design, our historic sliding sash window provides an authentic, high quality replacement for listed properties and those located in a conservation area. Featuring a cord and weight mechanism, the window is designed with narrow sash rails and thin frames to sit perfectly in the original opening.

For a perfect match with the original, the historic sliding sash window is offered with a number of sash horn styles and period sash window furniture. The sash furniture collection is available in a number of finishes including polished brass, polished chrome, satin chrome, satin nickel, antique brass, bronze and pewter. To browse all finish options, please refer to the Furniture tab. We can also incorporate solid glazing bars and astragal bars into the design.

In addition we offer a range of glazing options. Depending on your needs, we can incorporate narrow cavity double glazing or single glazing, both are available with the option of hand drawn or machine drawn glass for authenticity. If you are unsure of your glazing requirements, we will work with you and your appointed Conservation Officer to achieve a balance of energy efficiency and sympathetic replacement.

As is the case with the sliding sash windows from the Traditional Range, security features have been incorporated into the design of our historic sliding sash window. For maximum security, locking sash fasteners are fitted to the meeting rail and sash stops are fitted on either side of the frame. The sash stops restrict opening for security and safety.

  • historic sliding sash windows in The Lancaster's Development London
  • Historic wooden sash windows in Londons Holborn Viaduct
  • inSitu Historic Timber Sliding Sash Windows
  • historic wooden sash windows in the Chanel Building New Bond Street
  • Historic timber Sliding Sash Window Open
  • Closed Historic Timber Sliding Sash Window

Download Our Brochure

Our Historic Range brochure details how we can help with the sympathetic replacement of wooden windows & doors


Historic Wooden Sliding Sash Windows - Key Features

glazing in a timber casement window

Accurate Replication

For an accurate match to the original, top and/or bottom sashes can be specified with traditional sash horns. We offer several different horn types and if required, we can match to existing designs.

arched top timber box sash window

Traditional Layout Options

Our sliding sash windows can be adapted to replicate almost any existing design. We can manufacture them with arched heads, internal arched to the sash, as well as a range of bay and bow window designs.

The Sash Collection - Sash Fastener at Twr-y-Felin Hotel

Period Matching Window Furniture

For our sliding sash windows we have an elegant furniture collection that provides simple, effortless operation and high security. Authentic in design, we offer a number of finish options to complement your interior.

sliding sash window weather seals

Excellent Weather Performance

Our innovative, concealed weather seals achieve a much higher degree of weather performance than most of our competitors’ products. Air-tight and discreet they do not detract from the authentic appearance of the window.

Historic Range timber Sash window with external putty system

Glazing Options

We offer three types of historic glazing for our wooden sliding sash windows: narrow cavity glazing units, single glazing units and Pilkington Spacia (vacuum glass) unit. The glazing option that you choose will depend upon conservation planning requirements, your own personal preference and the allocated budget.

historic glazing systems in a sash window

Window Designs

In addition to the traditional box sash window, we offer a spiral balance design. Rather than using cords, weights and pulleys to counterbalance the sashes, a concealed spring balance offsets the weight of the sash.


We know that replacing wooden windows and doors can be a big undertaking, and so we offer a range of services to make the undertaking as simple and pain-free as possible.


Our industry leading manufacturer backed guarantees ensure that our windows and doors will last for many years.

  • 10 Year Glazing Unit Guarantee
  • 10 Year Hardware Guarantee
  • 30 Year Wood Preservative Guarantee
  • 7 Year Stain Coating Guarantee
  • 10 Year Paint Guarantee
  • 10 Year Weather Seal Guarantee