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What is a flush window?

Flush windows have taken the home improvement industry by storm over recent years, allowing homeowners to enjoy the look of traditional timber windows, with the thermal performance of uPVC. We’re approved installers of The Residence Collection, arguably the best flush windows available.

Flush windows are designed to imitate timber windows. Where the windows open, there isn’t an external lip – the opening part of the window instead sits flush against the frame. This detail looks very similar to how timber windows are made, allowing homeowners to achieve a traditional look without compromising on thermal performance. Not only that, but uPVC flush windows don’t need to be painted like their timber alternatives. A wipe down from time to time with a cloth and some uPVC cleaner is the only maintenance that your flush window frames will need.

Aside from being flush, there are other details that also help to achieve a traditional timber look. Features include Georgian bars, traditional hardware, and decorative corner posts.

Why choose flush windows

Style and substance

Modern flush casement windows have all the features and traditional aesthetic of the original historical iterations without any of the issues.  Your windows will look beautiful but also tick the box when it comes to thermal performance, which is crucial in these times of increased energy bills. 


If you live in a period property, or within a conservation area, and want to upgrade your windows whilst retaining the character, flush windows are a great option. This style will suit a wide variety of older style homes or heritage properties, come in a range of styles, colours and finishes and can feature Georgian bars, traditional hardware and decorative corner posts.


Flush windows are not just a style reserved for period homes, they look just as effective in more modern properties due to their sleek, streamlined design, making even the most ardent minimalist happy with the clean lines and smooth exterior. 

Energy performance

Flush windows are available double or triple glazed, keeping the heat out in the summer months and contained in the colder weather.    

Our flush window collections

The Residence Collection

The Residence collections are where traditional aesthetics meet contemporary needs and we specialise in Residence 7, Residence 9 and Residence2

Residence 7 represents a truly versatile option, working in both heritage properties and modern homes alike. The 70mm frame makes it simple to replace existing uPVC frames and you can select double or triple glazing, for a superior acoustic and thermal performance. 

Residence 9 authentically replicates traditional 19th Century timber designs, with a deeper 100mm frame and sculpted, internal finish, beautiful heritage colours and hardware options available. With a window energy rating of A++ this system offers a stunning flush appearance and hand-finished designs. 

Residence2  is a bold and contemporary choice offering a flush sash exterior and a unique square interior. With a 100mm deep, 9 chambered profile exceeding current and anticipated thermal standards, combined with an impressive colour palette, the Residence2 system offers unbeatable kerb appeal. 

Kömmerling Flush 70

The Kömmerling Flush 70 system will work in both traditional and contemporary homes. This new range of timber alternative flush windows combines an authentic aesthetic and modern technology, with a wide range of configurations available. 

Kömmerling Flush 70 offers innovative German engineering and market-leading energy efficiency and acoustic performance, with a 70mm frame and 6 chamber sash profile. Available double or triple glazed, beautiful heritage options offered include flush exteriors with durable, fully-welded joints and traditional furniture including tear drop and monkey tail handles, with an option for an astragal bar. 

Window design has evolved in recent years, with more use of large openings, helping to accommodate larger areas of glass that can be achieved particularly well with the Kömmerling Flush Sash. Large side openers and fixed lights offer perfect window symmetry and the maximum passage of light. These windows also offer perfect architectural appeal, whatever the property and location. There’s also the benefit of a wide range of standard and bespoke finishes inside and out.

Whether you desire the clever blend of old and new afforded by The Residence Collection, or the German-engineered versatility of Kömmerling’s Flush 70, we can help you make the right choice for your home. Contact our friendly team for more advice. 

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