When choosing new aluminium windows, there are lots of details to consider. From the style and colour of the frame to the type of glazing and opening configuration, each part can affect the finished result.
One detail that can sometimes be overlooked is the window sill.
But what exactly is a window sill, and why is it important when specifying aluminium windows?
What Is a Window Sill?
A window sill is the section fitted along the bottom of a window, extending out from the wall. It sits beneath the window frame and forms part of the finished installation.
As well as providing a neat finish around the bottom of the window, a sill can help direct rainwater away from the building rather than allowing it to run directly down the wall.
This makes the sill an important practical part of the overall window design.
Why Do Aluminium Windows Need a Sill?
One of the main purposes of a window sill is to help manage water.
When rain lands on a window, water needs to be directed away from the frame and the wall below. A suitably designed sill provides a projection from the building, helping water run away from the face of the wall.
This can be particularly important where the window is exposed to the weather.
A sill can also provide a clean transition between the window and the surrounding wall, helping to give the installation a more finished appearance.
Choosing the Right Sill
The right sill will depend on the individual window and the building it is being installed into.
The size and projection need to work with the wall construction, window position and surrounding finishes. This is why it is worth considering the sill as part of the window specification rather than treating it as an afterthought.
For replacement windows, for example, the existing opening and surrounding wall may influence the type and size of sill required. New build projects and extensions may offer more flexibility when planning the window and sill together.
Consider How It Will Look
While a window sill has an important practical purpose, it can also contribute to the appearance of the finished window.
The sill can be considered alongside the colour and finish of the aluminium frame to create a consistent look. Choosing options that complement the rest of the windows and doors can help the whole property feel more cohesive.
For some projects, a simple and subtle sill may be the preferred choice, while other designs may require a more substantial projection.
Part of a Bespoke Window Design
Every building is different, which is why having flexibility when specifying windows can be useful.
Aluminium windows can be made to order in different sizes and configurations, with options including window sills, different frame and vent choices, glazing options and a range of colours.
Considering these details together means the window can be designed around the requirements of the project rather than simply selecting a standard product.
At 23 Doors, aluminium windows are made to order to suit individual project requirements, with window sills available as part of the specification. If you’re unsure what you need for your project, speak to the team about your requirements.
