The real alternative to timber

Flush Timber Alternative Casement Windows

Perfect for Conservation Areas

Flush Casements, offer a real timber alternative window for your home

Flush sash windows beautifully fuse timeless style with cutting-edge performance, bringing together the charm of traditional timber with the advanced efficiency of modern PVCu. Designed with meticulous attention to detail, this style offers zero compromise - just elegant lines, high performance, and exceptional versatility.

With their sash sitting flush within the frame, these windows create smooth, clean lines that sit harmoniously against exterior walls. Optional Georgian bars, heritage-inspired hardware and realistic woodgrain finishes enhance their classic appeal, making them virtually indistinguishable from traditional timber. Slim sightlines further elevate the aesthetic, delivering an authentic look ideal for character properties, conservation areas, and period homes.

Yet behind the traditional appearance lies the innovation of modern PVC, delivering long-lasting durability, superb energy efficiency, and low maintenance peace of mind. Flush sash windows also offer excellent acoustic insulation and security, creating a warm, quiet, and safe environment inside your home.

Available in a range of colourways, finishes, and configurations, flush sash windows are the flexible, future-ready choice for both heritage renovations and contemporary new builds.

Timberstyle Flush Casement Windows are on display in our Abergavenny Window & Door Studio

Timberstyle Heritage Flush Sash window is reminiscent of early 19th Century timber windows and is ideal for heritage homes, particularly in conservation areas where authentic looks are all-importanth

A window that is truly timeless.

Authentic style. High-performing modern performance with our stylish flush timber-alternative window and door range

Colours that add character

With matching inside colour, or your choice of Flat White or White Grain across many of the finishes

Authentic style.

Timberstyle is the most authentic, high-performing and stylish timber-alternative window and door range currently available in the UK. Designed in Britain, with an understanding of the importance of the heritage requirements of traditional British homes, without compromising on modern security and thermal efficiency standards

As the name suggests, the Timberstyle Range will enhance any property, from the oldest character cottage to an architectural new build design. Part of the appeal is the choice of styles, allowing you to select classic looks or contemporary styling to enhance the appearance of a country cottage, traditional townhouse, or provide an upmarket finish to a modern extension or new build property

Modern Performance.

Innovative technology gives the Timberstyle range the edge over most other PVC windows. The traditional flush sash styling, combined with an authentic timber effect finish and a stunning range of colours culminate in a range of windows fit to compliment any British home. With thermal performance far exceeding that of timber windows, you will enjoy the look and feel of a classic traditional product whilst enjoying the benefits of modern insulating, structural, and security technology

Corner Joint options

ClassicWeld retains the flush finish, but with a classic welded joint, reducing the cost

Choose ClassicWeld or TimberWeld

Unlike other flush systems, the Heritage Flush Sash is available in two jointing options, ClassicWeld joints and Heritage Detail, our Traditional TimberWeld Joints. ClassicWeld gives a contemporary and modern twist to this heritage style. The corners are precision welded. The Heritage Detail Mechanical style Joint of TimberWeld is a traditional style mitred butt joint that is sealed in place, replicating a timber joint with meticulous detail

TimberWeld - our premium timber-like mechanical joint for true authenticity of period flush casements

New for Spring 2026

Launching for Spring 2026, our enhanced dual-joint Truweld is coming soon for our premium Flush PVC Windows

Truweld External Joint

Truweld Internal Mitre

Now combining the authentic 90-degree square-cut corner look that mimics traditional timber joinery. externally, with the strength of a welded classic Mitre on the inside

Truweld is an optional upgrade available across our Flush Heritage windows from Spring 2026

French Window with Floating Mullion

Flush Casement Window in Anthracite Grey with Floating Mullion French Window

A mullion is the centre post which sits between two sashes

Traditional mullion option with mullion in centre between 2 sashes
Mullion is attached to one sash and opens out with the sash
Mullion visible from the outside when windows are closed

Decorative sculptured frame
^{Combines flush sash styling with a traditional ovolo outer frame—ideal for adding charm and character.}

Thermal & acoustic performance
^{Multi-chamber design supports excellent energy savings and sound insulation.}

Heritage appeal
^{Perfect for homeowners looking to replicate period window styles with modern materials.}

Wide range of finishes
^{Available in a selection of classic colours and woodgrain foils to complement older or character properties.}

Thermal Performance

U-Values with Triple Glazing as low as: 0.96W/m2K or U-Values with Double Glazing as low as: 1.2 W/m2K

OUTSTANDING THERMAL EFFICIENCY

Super Efficient

Compared with aluminium or wood, PVC windows are low maintenance, typically have better insulation values and are able to reduce energy and heating costs.

Superior Acoustic Performance

Glazing options to maximise energy efficiency and/or acoustic performance

Weather Resistance

Timberstyle Flush Sash delivers outstanding weather resistance and performance

A Rated

Timberstyle Flush Sash delivers energy efficient A rated performance

Save on Energy Bills

Indicative U value achieved using a 28mm double glazed unit delivering high energy efficiency and big savings on energy bills compared to older double glazing or single glazing

Safe and Secure

For total peace of mind, our Timberstyle Flush Sash comes with multi-point security locking as standard

Double and Triple Glazing

Our Timberstyle Flush Windows are available in Double and Triple Glazed options

Double Glazed

28mm Unit
Integral Blinds option
Best performance to price
Typically 2.8 times better thermal performance than old double glazing, and up to 5 times better than single glazed

Triple Glazed Flush Windows

Triple Glazed

28mm Unit
Improved sound reduction compared to double glazed
Lead decoration if required can be applied to the centre unit, making aging from weather and cleaning a thing of the past

Timberstyle Features and Benefits

However traditional this window may look, it offers deceptively modern performance. Your home will be a haven of warmth and quiet, thanks to the thermal and acoustic insulation of the Timberstyle Flush Sash. It has a five-chamber internal construction for increased energy efficiency.

Flush Casement Window in Golden Oak on Cottage

Agate Grey Flush Casement Timeless Window

Flush Agate Grey Casement Window with single Astragal Cottage Bar

Flush Timeless Casement Window in Agate Grey with Georgian Bar Grid

Sleek slimline frames

Double and Triple Glazed options

Choose Classic Mitre Welded Joint or traditional Timber Style Butt Joint

Innovative smooth corner weld

Contemporary yet timber-like styling with the clean lines of Georgian Bar option or the authentic detail of Astragal Bar

Unique night vent facility for secure passive ventilation option

Modern and Traditional ironmongery options in wide range of finishes

High security handles and locks for homeowner peace of mind

Argon Gas Filled sealed glass units for increased energy efficiency

Enhanced security PAS 24 Approved* with double or triple glazing as option

Low maintenance reinforced PVC frames

Available in a wide range of curated Timeless grain finishes

*PAS24 is optional, please talk to your advisor

Modern Flush Casement Windows in Agate Grey

PREMIUM FLUSH SASH TIMBER ALTERNATIVE

The Timberstyle Flush Sash system is crafted from modern, weatherproof PVC, which unlike traditional timber windows, will never need sanding or repainting and will never rot, split or swell. These low-maintenance windows will keep your home looking its best for years to come with no more work than an occasional wipe with a damp cloth

The Timberstyle Flush Sash is the latest innovation to come from one of the UK’s leading PVC systems suppliers.

Unlike chamfered and sculptured styles which are designed to add contour and detail to your windows, the Timberstyle Flush Sash sits flush within the frame and offers traditional, understated elegance.

Timberstyle Flush Sash can be specified in bespoke sizes to suit the windows of your home, whether it’s a tall townhouse or a quaint and cosy cottage.

Flush Casement Windows Timeless in Cream Grain with Astrgal Bar Grid

Timberstyle Shaped and French Windows

Our stunning Shaped and French Windows allow you to bring the outside in

Irish Oak Flush Casement Timeless WIndows with Lead Box Grid design

SAFETY and SECURITY

Your windows shouldn’t just look the part, they should provide the highest standards of security to keep your family, home and belongings safe

With the Timberstyle Flush Sash, you don’t have to choose between style and security

Thanks to the system’s clever design, it seamlessly combines timeless elegance with a range of robust security features

Every window offers multipoint locking and features industry-leading hardware in the form of stylish key-locking handles. The multi-chamber construction of the window frames ensures impressive structural strength

Timberstyle windows have Secure by Design accreditation; a police approved initiative aimed at improving the standards in home security. It also meets or exceeds all British Standards and holds relevant accreditations for all aspects of security and weatherproofing

• Traditional mullion option with mullion in centre between 2 sashes

• Mullion is attached to one sash and opens out with the sash

• Mullion visible from the outside when windows are closed

Everyday convenience of a side opening

Centre mullion opens out with second window

"A mullion is the centre post which sits between two sashes"

Timberstyle Hardware

You can personalise your beautifully-designed Timberstyle Flush Sash windows with a choice of Timeless details. Choose our decorative monkeytail or peardrop handles with ornamental peg stays to give the feel of a genuine traditional timber window

Peardrop Handle

Unique cranked design provides good clearance between the handle and the window

A unique, traditionally designed teardrop handle that fits perfectly with the Timeless Window and Door Collection. The Peardrop handle grip has been ergonomically designed to fit perfectly in the palm of your hand

Pewter Patina

Satin Chrome

Polished Chrome

Matt Black

Antique Bronze

Pegstay for PVCu Flush Casement Windows

Matching traditional peg stays are available to create a perfectly matching Timeless window. Available in matching colours as above

Monkeytail Handle

Elegant design inspired by 19th century ironmongery

Manufactured from die-cast zinc with a specially formulated finish, it is suitable for all our Timeless styles, most rooms and most interior schemes, you just need to choose the best colour option for you

Pewter Patina

Satin Chrome

Polished Chrome

Matt Black

Antique Bronze

Monkeytail Pegstay for Flush Casement Window

Matching traditional peg stays are available to create a perfectly matching Timeless window. Available in matching colours as above

A full range of modern, classic and traditional hardware is also available and compatible with our Timberstyle Collection

Flush Timeless Window with Arch Fillet in Cream Grain with Astrgal Bar

Black and White Grain Flush Casement Bay Window

Quality and Performance

Full 70mm, 5 chambered profile system

Manufactured under BS7412 and BS7413

Glazed windows are BFRC 'A+' energy rated as standard

10-Year written guarantee

Handcrafted using traditional butt jointing

Wide range of colour finishes

And a Timberstyle Door to match

FREESTYLE ENGINEERED ENTRANCE DOORS

We can now supply a Classic Engineered Entrance Door to match your flush windows

Available in all the same heritage colours as the Freestyle Flush Casement Windows, you can have a door that matches your windows without the extra lead times

Find out more on our Freestyle Engineered Entrance Doors

Freestyle Engineered PVCu Entrance Door 6 Panel Agate Grey Grain

Recently installed local Timberstyle Timber Alternative Flush Casement Windows

Timber-like Flush Casement Windows installed in and around Abergavenny by our own teams

View or Download the latest Timberstyle Flush Brochures

As Approved Installers for Heritage Flush Casement Timber Alternative Replacement Windows, we offer our dedicated survey and install service throughout South Wales including Abergavenny, Newport, Cardiff, Barry, Monmouth, Chepstow and Brecon areas and beyond

Made in the UK

Our Timb Heritage Flush Windows and Screens are individually made in Stoke-on-Trent UK

Technical

Minimum and Maximum Dimensions

Window Style	Min Width	Min Height	Max Width	Max Height	Design Wind Pressure
Side Hinged	400mm	400mm	700mm	1350mm	800 Pa - 2400 Pa
Top Hinged	400mm	400mm	1250mm	1250mm	800 Pa - 2400 Pa

Based on Double Glazed 4mm+Argon+4mm Glass Units, other glass specifications are available and will change the unit weight and therefore the maximum sash sizes