Flush casement

Timeless® Flush Timber Alternative Casement Windows

Timeless Heritage Flush Window Logo


Timeless 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 Timeless 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

Timeless Flush Casement Window Internal with Handles Teardrop style


Innovative technology gives the Timeless Range the edge over most other uPVC 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

Flush Casement Windows in Cream Grain with single Astragal Cottage Bar

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

Double and Triple Glazing

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

Double Glazed Flush Windows

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

Timeless 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 Timeless 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

  • Standard and hidden mullion options

  • Choose Classic Mitre Welded Joint or  traditional Timber Style Joint

  • Innovative smooth corner weld  

  • Contemporary yet timber-like visuals Exquisite Georgian bar option

  • Unique night vent facility

  • Traditional ironmongery options

  • High security handles and locks for  consumer peace of mind

Sealed unit for increased energy efficiency 

  • Enhanced security PAS 24 Approved* with Double or triple glazing available

  • Low maintenance  uPVC frames

  • Available in a wide range of hand-picked  Timeless woodgrain finishes

ClassicWeld on Flush Casement WindowsClassicWeld retains the flush finish, but with a classic welded joint, reducing the cost


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 Timeless Flush Casement Windows Mechanical WeldTimberWeld - our premium timber-like mechanical joint for true authenticity of period flush casements

Flush Irish Oak Casement Window Bay

Flush Casement Window with Monkeytail Handles

Modern Flush Casement Windows in Agate Grey

Flush Casement Window with Lead Box decorative glass

Flush Casement Windows internal in White


The Timeless Flush Sash system is crafted from modern, weatherproof uPVC, 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 Timeless Flush Sash is the latest innovation to come from one of the UK’s leading uPVC systems suppliers.

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

Timeless 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.

Timeless Flush Casement Window Corner Section


Super Efficient

Compared with aluminium or wood, uPVC windows are low maintenance, 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
Timeless Flush Sash delivers outstanding weather resistance and performance
A Rated
Timeless Flush Sash delivers energy efficient A rated frames
Save on Energy Bills
Indicative U value achieved using a 28mm double glazed unit delivering high energy efficiency and big savings on energy bills
Safe and Secure  
For total peace of mind, our Timeless Flush Sash comes with multi-point locking as standard
Flush Casement Windows Timeless in Cream Grain with Astrgal Bar Grid

Timeless 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
White Grain Flush Casement Windows with Single Astragal and Shape Gable


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 Timeless 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

Timeless 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

Flush Casement Window White Internal with Lead Box Design

Everyday convenience of a side opening

Timeless Flush Casement French Window with Floating Mullion Open

Centre mullion opens out with second window

Timeless Hardware

You can personalise your beautifully-designed Timeless 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

Teardrop Handle Pewter Patina

Pewter Patina

Teardrop Handle Satin Chrome

Satin Chrome

Teardrop Handle Polished Chrome

Polished Chrome

Teardrop Handle Matt Black

Matt Black

Teardrop Handle Antique Bronze

Antique Bronze

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

Monkeytail Handle Pewter Patina

Pewter Patina

Monkeytail Handle Satin Chrome

Satin Chrome

Monkeytail Handle Polished Chrome

Polished Chrome

Monkeytail Handle Matt Black

Matt Black

Monkeytail Handle Antique Bronze

Antique Bronze

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

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

Black and White Grain Flush Casement Bay Window
Flush Casement Bay Window Internal

Flush Casement Decorative Lead and Stain Glass Design

Colour Selection

Core Colours

The on-trend colours for this season, and year-on-year favourites

Flat White
White Grain
Agate Grain
Pebble Grain
Cream Grain
Chartwell Grain
Silver Grey Grain
Slate Grain
Anthracite Grain
Black Grain
Stipple Anthracite
Spectral Grain
Irish Oak WoodGrain
Golden Oak WoodGrain
Rosewood WoodGrain
AnTeak WoodGrain
Show your home some love, with Windows and Doors perfectly colour matched to your homes unique character. From RAL™ and British Standards™, through Pantone™ - even Farrow and Ball™ or Little Greene™ paints, and many more


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 about our Classic Engineered Entrance Doors

Arched Freestyle Engineered Entrance Door in Green with White Frames and Side Screens

Freestyle Engineered PVCu Entrance Door 6 Panel Agate Grey Grain

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

Recently installed local Timeless Timber Alternative Flush Casement Windows

View or Download the 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 Timeless Heritage Flush Windows and Screens are individually made in Stoke-on-Trent UK


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 400mm1250mm  1250mm800 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