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Heritage Flush Sash Windows

The most authentic flush casement window system

Heritage Timberlook Flush Sash Windows

Our Heritage range replicate traditional 19th Century wooden windows with energy-efficient uPVC profiles. Hand-built in the proper way to achieve the look of traditional butt joints. The flush style casement is ideal for period or historic projects and the windows are accepted in conservation areas by local planning authorities. Simply put, it’s in a class of its own, without sacrificing on performance.
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Heritage Flush Sash Window Features

Heritage Flush Sash Window Mullion Joint

There are no tell-tale diagonal welds or joints that normally identify a uPVC window, the transom and mullion joints are finished as a butt joint – just like a timber window. Not only does this add strength and rigidity, it accurately mimics the way original timber frames were joined. It’s this attention-to-detail that makes the most authentic, conservation-friendly heritage look flush sash window on the market.


The patented Timberweld technology creates the most authentic timber mortise and tenon joints on the market. The joints on the frame and sashes are welded for strength, they have the appearance of traditional horizontal butt joints on the frame and vertical butt joints on the sashes.

Heritage Flush Sash Window Corner Joint
Heritage Flush Sash Window Inside

Timberlook wood-effect flush sash windows are more suited to modern living than timber window. They included a refined full ovolo decoration internally, with elegant finishing touches to complete and enhance the traditional appearance, such as antique black monkey-tail handles or dummy peg stays.


NiCo Hardware
These windows are protected by NiCo ram bolt bi-directional locking system. With a minimum of 4 bi-directional locks on each sash securing the openers the full height of the opening sash, in addition the hinges act as 2 extra securing points.

Nico Multilock Locking System
Heritage Flush Sash Windows Ventilation

When trickle ventilation is required, it is usually rather unsightly externally. We don’t believe in spoiling the appearance of your window or property – if your project includes trickle ventilation, they can be concealed by a head drip on the Timberlook outer frame.

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Energy Efficient

We manufacture windows that meet the highest energy efficiency ratings for your home. The window frames feature an advanced multi-chambered section which helps to prevent heat loss. The sealed units are fitted with thermal spacer bars, the latest high specification glass and argon gas sealed into the glazing cavity. This will reduce energy costs and, crucially, create a comfortable living environment for you and your family.

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Noise Reduction

Two high quality 4mm glass sheets and noise suppressing argon gas produces outstanding noise reduction as standard throughout our range of products.

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Low Maintenance

As beautiful as real timber is, it can swell, shrink, warp or twist depending on the weather. Wooden window frames are expensive to buy, and need ongoing care and attention – sanding and painting. The cost and time taken to preserve their appearance soon adds up. Timberlook Flush Sash Windows simply don’t need that sort of maintenance, other than the occasional wipe down with a damp cloth and a lubricating spray on the moving parts, there is no painting, warping or rot and no hassle.

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Environmentally Green

Polar Glaze is an environmentally responsible manufacturer. The Company recycles the old window frames along with the off cuts from our production plant, which would otherwise go to landfill, helping to reducing CO2 emissions.

Heritage Flush Sash Window Options (Finishing Touches)​

Traditional Painted Wood-Effect Window Colours

The range of colours and finishes have been carefully selected to complement buildings of any age. There are colours to suit all buildings, no matter the type of stone, brick, or mortar with which it is built. *These are both available with a smooth or grain finish.

Flush Casement Window Colour Option White

Authentic astragal bars
Heritage Flush Sash Window Georgian Bar Layout
Georgian Bar
Heritage Flush Sash Window Georgian Layout
Georgian Four Square
Heritage Flush Sash Window Georgian Grille Bar Layout
Georgian Grille
Handle colours
White Window Handle Casement Windows
Chrome Handle Casement Windows
Graphite Window Handle Casement Windows
Black Window Handle Casement Windows
Gold Window Handle Casement Windows
Traditional Hardware
Heritage Flush Sash Window Traditional Hardware Teardrop
Heritage Flush Sash Window Traditional Hardware Monkey Tail
Monkey Tail
Heritage Flush Sash Window Traditional Hardware Peg Stay
Peg Stay

Heritage Flush Sash Window Specifications

Nico Multilock Locking Systems Logo

4 point bi-directional locking system and 2 hinge locks.

Internally Beaded Icon

Internally glazed with low sightlines
Increasing security so the glass cannot be removed from the outside. Window rubbers are not visible giving cleaner modern lines.

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A-rated 24mm glazed units
Windows and doors can add up to 25% of the heat loss escaping from your property. Reducing your energy bills.

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Prices from £500
These prices are a guide starting price and will vary depending on size, design, profile, colour and glass details.

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10 year Insurance guarantee
The QNAW warrantee our guarantee to our customers in the event if we cease to trade.

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10 year guarantee on glazed units
In the event they break down and have condensation between the panes of glass.

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Manufactured in the UK
Manufactured in the UK, bespoke aluminium French doors fabricated just for you using Smart Systems, on modern state of the art production line.

Heritage Flush Sash Windows Gallery

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Polar Glaze logomark – manufacturer & installer of windows, doors & conservatories

opening times

Mon-Thur 9.00am-5.00pm, Fri 9.00am-4.30pm

Call us on 01202 631 908

Polar Glaze logomark – manufacturer & installer of windows, doors & conservatories