uPVC Flush Sash Windows: A Modern Twist on a Classic Design
Windows are far more than just a functional element of your home – they have a significant impact on a property’s character. While standard uPVC casements have been a familiar sight across UK homes for decades, from rural cottages to contemporary developments, another window design has recently captured the imagination of homeowners.
The flush sash window design has experienced a huge surge in popularity recently, owing to its versatile aesthetic that complements both period properties and new-builds with equal elegance.
Here at Timberlook, we’ve perfected the art of creating uPVC flush sash windows that pay homage to classic timber designs while embracing the advantages of modern materials.
What exactly is a flush sash window?
While traditional casement windows typically have a sash that sits proud of the frame when closed, flush sash windows are characterised by a sash that sits perfectly flush within the frame. This style of window was historically found in period properties dating back to the 19th century.
Despite being based on a traditional window style, the flush design offers a minimalist profile that works beautifully in both heritage buildings and contemporary homes. It’s this versatility that has made flush casement windows increasingly popular across a wide range of architectural styles.
What’s the difference between a flush sash window and a flush casement window?
Believe it or not, “flush sash” and “flush casement” mean essentially the same thing! A casement window is simply one that’s hinged at the side and opens outward like a door, while ‘sash’ refers to the opening part of the window. Both terms describe a window design where the opening section sits perfectly level with the frame when closed, creating that distinctive streamlined appearance.
The benefits of uPVC: why choose a uPVC flush sash window over timber?
While flush sash windows were traditionally made with wood, there are many advantages to choosing a uPVC design.
Timber windows undoubtedly possess a natural charm but they come with significant maintenance requirements and a hefty price tag. Our uPVC flush sash windows provide excellent energy efficiency, low-maintenance requirements, durability and security. Better still, they are far more affordable than timber!
Built to last
Unlike timber, uPVC won’t rot, warp or split over time. Our windows are designed to withstand the British weather year after year, maintaining their appearance and functionality without the need for regular repainting or treatments.
Excellent energy efficiency
Modern homeowners are increasingly conscious of energy costs and their environmental footprint. Our uPVC flush windows provide superior thermal performance, helping to keep your home warm in winter and cool in summer. Available with U-values as low as 1.2, they reduce heat loss, potentially leading to substantial energy savings on your heating bills.
Low maintenance
Perhaps one of the most appealing aspects of uPVC windows is their minimal maintenance requirements. A simple wipe with soapy water is all that’s needed to keep them looking their best.
Maximum security
Security is paramount in modern window design. Our flush casement windows incorporate robust multi-point locking systems, providing total peace of mind. Unlike wooden windows, which can weaken over time, our uPVC frames maintain their structural integrity year after year.
The Timberlook difference: what sets our flush sash windows apart
Unsurprisingly, not all uPVC flush sash windows are made equal. So what can you look for when choosing the right windows for your home?
At Timberlook, we believe that the smallest details make the biggest difference. We’ve poured decades of industry expertise into creating a uPVC flush sash window design that accurately replicates historical timber window styles down to the finest detail.
Using innovative Timberweld technology, we’ve eliminated the unsightly diagonal welds typically associated with uPVC windows. Instead, our windows feature authentic-looking mortise and tenon joints that are virtually indistinguishable from traditional timber windows.
Every detail has been carefully considered, from our heritage-inspired colour palette (which includes realistic woodgrain foils) to our period-appropriate hardware range.
We’ve even designed our windows with concealed trickle vents, ensuring the heritage aesthetic remains uncompromised while meeting modern building regulations.
Put simply, the Timberlook range encompasses everything that homeowners love about classic timber window styles with none of the hassle or cost!
Conservation-friendly design
For those living in conservation areas or period properties, finding appropriate windows that satisfy the local planning authority can be challenging. Timberlook’s flush sash windows have been specifically designed to meet these exacting requirements, often receiving approval where other uPVC options would be rejected.
We created a specifiers guide aimed specifically at planning officers, which provides technical details and information essential to securing planning permission in a conservation area.
Our windows have passed the test of time in numerous conservation projects, proving that it’s possible to honour architectural heritage while embracing modern performance standards. By replicating the fine details of traditional flush casement windows, we’ve created products that preserve the character of historic buildings without compromising on energy efficiency or security.
Our windows have even been granted approval in the picturesque Cotswolds, where the local authority commented:
“…[Timberlook] uPVC units have been accepted as a variation on Condition 11, they are considered to successfully mimic traditional flush casements, and care has been taken over details such as the sill and trickle ventilation…”
– Heritage Officer, Cotswold Council
Customisation options to perfect your home
Your home is unique, and your windows should reflect that individuality. That’s why we offer a wide range of colours and finishes to complement any property.
As well as our heritage-inspired colour range (which includes classics like White, Anthracite and Chartwell Green), we also offer a range of realistic woodgrain foils that replicate the textures and tones of real timber. From Irish Oak to Rosewood, our woodgrain finishes are so realistic, most can’t tell the difference.
Beyond colours, we can offer various glazing options, including patterned and obscure glass for bathrooms and other spaces where privacy is important. For period authenticity, we can even incorporate traditional “Radlington” cills and astragal bar designs.
Perfect for every property: can uPVC flush sash windows be used in modern homes?
Whether you’re renovating a Victorian terrace, updating a 1930s semi-detached, or putting the finishing touches to new build properties, our flush casement windows adapt beautifully to every setting.
Many homeowners wonder if flush sash windows suit modern properties – and they absolutely do! The remarkable versatility of the flush sash design is one of its greatest strengths. For those drawn to traditional character, our windows can be finished with authentic woodgrain foils, period-appropriate hardware and astragal bars to capture the look of classic cottage windows.
Conversely, if your preference leans toward contemporary style, our flush sash windows in sophisticated anthracite grey, complemented by minimalist hardware and sleek shallow cills, deliver the clean lines and understated elegance that complement modern homes beautifully.
Whatever your property style, our windows can be customised to match it.
A set of black flush casement bay windows in uPVC, combining heritage aesthetics with energy efficiency and durability.
Ready to find out more? Contact Timberlook today
Whether you’re replacing outdated aluminium windows, upgrading from standard uPVC, or restoring a period property, our flush casement windows offer the perfect blend of traditional aesthetics and modern performance.
For a free, no-obligation quote or to discuss your specific requirements, please complete our online contact form or call 01253 888 222. Our friendly team of experts is ready to help you create the home of your dreams with the perfect uPVC flush sash windows.
