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What Are Flush Sash Windows?

If you’re looking into upgrading your windows, you’ve probably come across the term: flush sash windows. But what exactly is this type of window? And why should you consider adding it to your home?

Well, you’ve landed in the right place. At Plan-it Windows, we know everything there is to know about the different types of window upgrades and installations. In this blog we’ll walk through all the information you need to know if these are the windows for your home. Let’s get into it.

What is a Flush Sash Window?

Ditch the clunky window ledges and step into a world of sleek modernity with flush sash windows. Unlike traditional windows with protruding frames, this style sits flat against the exterior wall, creating a smooth, continuous appearance.

What Are The Pros of a Flush Sash Window?

Flush sash windows aren’t just about a sleek appearance. They come with a full range of benefits that improve your home and day-to-day life in multiple ways.

Timeless Visual Appeal

Flush sash windows add a touch of modern sophistication to any home, but their ability to mimic classic timber frames makes them versatile enough to complement any architectural style.

Innovative Energy Efficient Construction

These clever windows boast superior thermal performance thanks to modern materials, durable seals and clever design, which means warmer winters, cooler summers, and lower energy bills.

The Best of Both Worlds

Since flush sash windows can be crafted from a wide variety of materials, including aluminium and uPVC, you can enjoy the traditional beauty of timber windows with the benefits of modern materials. Essentially, it’s the traditional charm without the heavy maintenance demands.


When closed, the window sits completely flush with the exterior wall. This makes it incredibly difficult to break into – so you can relax, knowing your home and family are safe and secure.

What Are The Cons of a Flush Sash Window?

While flush sash windows offer a tempting blend of style and efficiency, it’s only fair to consider the other side of the coin. Here are some potential drawbacks to keep in mind:

Higher Price Tag

Compared to traditional windows, flush sash options typically come with a steeper initial cost. The innovative design and premium materials contribute to this, so prepare for a bigger investment.

Limited Opening Styles

While offering excellent ventilation, some flush sash configurations have restricted opening options compared to traditional casement windows.

Not for Historic Homes

The modern aesthetic of flush sash windows might clash with the architectural style of older homes. In these cases, Georgian windows might be better suited.

How Much Are Flush Sash Windows?

The cost of flush sash windows can vary, depending on a few factors:

  • Size Matters: Big windows mean big investments. The overall size of your desired windows will be a major cost driver.
  • Material Choice: uPVC is generally the most affordable option, while aluminium and premium finishes like timber-effect foils will push the price up.

If you add other features, such as integrated blinds, or choose non-standard colours, this can also add to the overall cost. At Plan-it Windows, we manage the full supply and installation process. This means you can cut out the costly middle man – get in touch with us today for a free quote.

How Do You Clean Flush Sash Windows?

Cleaning your flush sash windows might sound complicated, but it is relatively easy. Here are a few simple steps you can follow:

  • Dust: Begin by removing any loose dirt or debris from the window frame using a soft brush or cloth. This ensures a smooth cleaning surface.
  • Mix a Mild Solution: Prepare a gentle cleaning solution by mixing warm water with a non-abrasive detergent. Dish soap typically works well. Avoid harsh chemicals, as they might damage the window’s finish.
  • Wipe with Care: Using a soft, absorbent cloth (microfiber is recommended), gently but thoroughly wipe down the frame and glass. Pay extra attention to corners and crevices.
  • Rinse Away the Residue: Use a clean water rinse to remove any leftover soap, resulting in a streak-free finish.
  • Final Touches: Dry the windows with a clean, lint-free cloth to eliminate water spots and achieve a sparkling shine.

Take Your Home To The Next Level With Plan-it Windows

Whether you know flush sash windows are for you, or you’re struggling to choose a window style, we’re the experts you need. With decades of experience and a streamlined, turn-key service, there’s no better name to trust than Plan-it Windows.

Give our team of specialist installers a call – they’re on hand to answer any question you may have and can give you a fully customised quote, for free.

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