What Is a Timber Casement Window?

The casement window is a hinged window and can be hinged at the side of the top (top-hung window). Available in a variety of frames other than timber, you can find casement windows in uPVC or aluminium to suit contemporary buildings.

Timber casement windows are a very popular style in the UK as they are hugely versatile.

The Many Forms of Casement Windows

  • Side hung – the most popular and commonly seen casement window style, the window swings outwards as it opens
  • Single casement – a simple window with one panel that is normally side hung
  • Double frame or French casement – this design features two panel windows that are both side hung. There is a central mullion with the window handles in the middle and as the windows open outwards, this creates a large aperture which can really enhance a beautiful view. Full length French windows are still called French windows, not French doors!
  • Top hung or awning window – this a style that opens from the bottom and is hinged at the top. The window swings outwards so won’t allow rain ingress, perfect for warm, wet climates
  • Bottom hung or hopper window – a bottom hung window opens at the top of the frame with a hinge at the bottom. This style is perfect for upper floor rooms and apartments to allow safe opening
  • Flush casement – this is a modern take on a casement classic, when the window is closed, it sits flush in the frame. It’s a popular style for contemporary homes, particularly with aluminium frames that have a slim profile
  • Fixed casement or picture window – this sounds a bit counterintuitive but is usually part of a larger window that has opening options, like a bay window with openers on either side

It’s easy to see why casement windows are so popular as they have endless configurations to suit all types of properties and locations.

What are the Different Parts of a Casement Window?

Starting with the frame, this holds the window in place. Frames can be made of uPVC, aluminium or wood. We always recommend timber frames for the finish, durability and aesthetic appeal. The window sill is the bottom of the window frame (sometimes, these are referred to as cills) and is slanted away from the building to help direct water from the frame and the wall.

The casement is the part of the window that opens. If you want a French casement, then this will feature a mullion which is a vertical strip of uPVC or timber that divides the two windows. A transom is the horizontal equivalent of the vertical mullion.

Some casement windows feature trickle vents which are grills on the outside and a closing vent on the inside. Georgian bars are vertical and horizontal bars that create a grid and give the classic appearance of traditional windows, dividing the glass up into smaller squares.

The Advantages and Disadvantages of Casement Windows

Casement windows are an enduringly popular window style, but they do have their limitations. For instance, a casement window is limited by the size of the opening panel. An opening panel hinge has to support the weight of the window so will be limited by this, and this explains why bay windows have a fixed central or picture window with smaller casements that open at the side.

Despite the limitations of the size of the opener, casement windows are still a hugely versatile style and can work in different configurations to suit most apertures and styles of houses. Casement windows are available in all types of window frames and are designed to maximise energy efficiency when they are closed.

Why Timber Casement Windows?

We believe that timber offers the best look not just for period properties but also for contemporary homes. It has a sleek durable finish with texture and character that suits all types of properties. Modern hardwoods offer impressive performance when it comes to durability and weatherproofing so are lower maintenance than you might think.

We manufacture and design wooden casement windows for all types and styles of property combining quality timber with modern thermally efficient glazing and draughtproofing to produce a stylish result that offers heat retention, acoustic control and optimal security. We also repair and refurbish timber casement and sliding sash windows on-site and at our workshops.

Contact us here to find out more about bespoke casement windows and our repair and restoration services.