Sliding Sash Windows

Sash windows have been a feature of many British houses for several centuries. To the untrained eye, all sash windows look similar, but in reality the many types of sash window are very different and can be loosely placed in a number of periods, including Georgian, Victorian and Edwardian.

Sliding Sash Windows Vertically Sliding Sash Windows

Designs & Styles

Sash windows, like most architectural and design features have evolved significantly over time. Replacing draughty single glazed windows with traditional sash windows provides the perfect solution for period renovations projects, but there are several types of sash windows to choose from. These are:

Single-Hung Sash

Single hung sash windows have only one section that moves and the design is more commonly found in older properties. In a single-hung sash window the bottom sash pushes up whilst the top sash remains fixed in place.

Double-Hung Sash

Double hung sash windows slide vertically using a combination of corded weights and pulleys. Double-hung sashes can vary in design and the most popular design is a classic six-over-six. This design is divided into three sections with six panes in the top section of the window and six panes in the bottom.

Tilt & Turn

Tilt & Tilt windows are well established in the UK market and are a very popular option amongst homeowners. A quarter turn of the handle opens the window partially by tilting it inwards from the top, which is ideal for ventilation.


Sash windows are available in two different materials: genuine timber and uPVC. Wooden sash windows are a perfect solution for traditionalists who live in either a conservation area or a listed building, where you simply cannot achieve the same effect with uPVC. Furthermore, because timber is an excellent insulator and highly durable, you can maximise heat retention and make your property more secure.

uPVC is often used as a substitute for timber, and although windows are more commonly seen in white, uPVC sash windows are available in a wide range of colours and finishes including a photo-effect wood finish. uPVC is a low maintenance material and highly durable, which means it will never rot, rust, peel or flake. Furthermore, uPVC sash windows can cost as much as 40% less than genuine timber sash windows which not only makes them more cost effective, but a practical alternative.

Consumer Benefits

When you enter into a contract with a member of DGCOS to install glazing products at your home in England, Scotland, Wales or the Isle of Wight, you should receive the following.

  • Consumer advice line 
    We are on hand to answer any questions you may have once you have entered into a contract with a scheme member.
  • Deposit and stage-payment protection insurance
    This covers up to 25% of the contract value (maximum limit of £5,000) for 120 days, once your installation is registered with us.
  • Insurance-backed guarantee (IBG)
    An IBG provides protection if your installer ceases (stops) trading and cannot honour the terms of their written guarantee. You will receive an IBG once the member has added in a date on our system to show when they completed your installation.
  • Alternative dispute resolution 
    Our expert mediators are always on hand to help resolve any disputes you may have with one of our members.
  • Access to an ombudsman 
    You will have free access to an ombudsman if we cannot settle your complaint.

Please read the consumer advice section to understand the protection you may receive and the obligations you have. Click here to visit the consumer advice section.

Recent Installations of Sliding Sash Windows
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