Why Are Equal Sightlines Important?

What are Sightlines?

Sightlines refer to the lines of sight created when looking out of a window. They also refer to the lines seen on the windows when looking at the property from the outside. This includes the frames, glass panels and glazing bars being in line.

The areas of visibility through a window can be affected by a number of factors such as the size, shape, and placement of the window. Architects, designers and window specialists all consider sightlines carefully in their work.

The term ‘equal sightlines’ usually refers to the horizontal line of a window, but homes can also have vertically equal sightlines. The sightline can also refer to the amount of window frame you see when you are looking directly at it. Narrow sightlines mean slimmer frames and conversely wide sightlines mean thicker frames.

For leaded glass and Georgian bar windows, symmetry is key, so equal sightlines are particularly important on these types of windows.

How Are Equal Sightlines Created?

Many consider equal sightlines desirable. You may see manufacturers boasting that a product offers ‘reduced sightlines’ or even ‘superior sightlines’. This means that all the dimensions of the glazed panels on a window are the same.

One way to create equal sightlines is to use dummy sashes (also known as dummy vents) to create equal sightlines between the fixed glass panels and the openings. Dummy sashes are made to look like the openings on the windows they are in line with, producing equal sightlines. This means that each of the windows in the home features a uniform, identical opening.

Another example of creating equal sightlines would be to create equal vertical sightlines. Fixed windows can be placed above other fixed windows and the same for opening windows. This creates a sense of balance within the design, as the shaping of each set of windows will be the same. Also see our article on non-equal sightlines.

How Important Is It to Have Equal Sightlines?

Some properties’ designs will benefit more from equal sightlines. Where unequal sightlines may look very obvious in one home, they may be less obvious in another. Equal sightlines help create a home that looks perfectly balanced and in proportion but they are not at the top of everyone’s priority list when choosing new windows.

Equal sightlines can ensure that all parts of a room benefit from an equal amount of light but this is unlikely to be very noticeable in most properties.

How Can I Create Equal Sightlines?

If equal sightlines are important to you for your home, you can consider the following ways to achieve them:

• Choose windows with equal glass sizes: One of the simplest ways to create equal sightlines is to choose windows with equal glass sizes. This means that the height and width of the glass panes in each window should be the same. This will ensure that the sightlines are equal across all windows.
• Use window grilles or mullions: If you prefer a traditional look, you can use window grilles or mullions to create the appearance of equal sightlines. Grilles and mullions are decorative elements that divide the window glass into smaller sections. They can be used to create a more symmetrical appearance and equalize the sightlines.
• Install window treatments: Window treatments such as curtains, drapes, or shades can help to equalize sightlines. By covering the entire window opening, they can create the illusion of equal sightlines, regardless of the actual size or shape of the windows.
• Plan the placement of windows: The placement of windows is another important factor in creating equal sightlines. If building a new property or an extension, try to place windows at regular intervals along a wall or facade. This will create a more uniform appearance and help to balance the sightlines.

Equal Sightlines in Summary

When investing in new windows or a glazed extension, the sightline is critical to your experience. Whether you choose to have equal or unequal sightlines very much depends both on the style of your property, and how you want to use your windows to get the best out of them.

Consider the sizes, shapes and proportions of the glass panels, the frames and any leading, and remember that the amount of light let in will be impacted by the thickness of the frames.