New Sash Windows in London

We offer wooden sash window restoration, sash window installation, double glazing, maintenance, refurbishment and replace old sash windows.

Arthur East

Arthur is a hardworking and dedicated Glazing specialist, with over 10 years trades experience


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What Are The Types of New Sash Windows We Install?


Sash Windows are one of the earliest forms of windowed architecture and were used in Western Europe from the 12th century onwards. Sash windows remain popular today, with many types of traditional sash windows still being built by various manufacturers. Sash windows come in all shapes and sizes, each with its own features and benefits which will make particular sash windows more appropriate for certain situations than others. At Trade Timber Windows and Doors Sash Windows London, we carry a wide range of sash windows products.

uPVC Sash Windows

uPVC windows are the answer to many homeowners’ prayers. If you’re after a durable window that will stand the test of time — as well as providing real value for money — uPVC sash windows are a superb choice.

Timber Sash Windows

Timber Sash Windows are among the most popular, traditional and versatile window styles. They’re generally made from hardwood or pine. If you live in a historic building, chances are your sash windows will be timber-framed. Our sash installer will take the timber frames then fit double glazed panes into them. This ensures your windows are insulated properly whilst maintaining their original look and character.

Box Sash Windows

Box sash windows, also known as box frames, are a type of sash window that have had several improvements. They don’t need any special foundations and can be installed fairly quickly. This makes them ideal for new builds or for renovating period properties.

Spring Balanced Sash Windows

The spring balanced sash window is one of the most common designs of new sash windows in the UK and is particularly popular due to its stability. With its use of springs to hold the sash open, this window closes gently to ensure it does not put pressure on the glass.

Legacy Sash Windows

Legacy Sash Windows are high-quality made-to-measure drop sashes, available in a choice of hardwood and softwood timber. Our Legacy sash windows are designed to fit many styles of home. You can choose from our wide range of wood colours and veneers, so you can be sure we’ll have the perfect style for you.

Georgian Sash Windows

Georgian windows are one of the most popular window types for refurbishment and new build projects. They are characterised by their simple glazing bars and slender proportions, as well as additional features such as cills. Georgian sash windows can have either two or three lights; however, three light Georgian sash windows are more common on properties in London.

Victorian Sash Windows

Victorian sash windows offer timeless elegance and a simple, clean design. They’re the perfect match for traditional or cottage-style homes as their plain frame works well with any design scheme. These windows are an ideal choice if you like to enjoy fresh air and are looking for natural lighting during the day.

Edwardian Sash Windows

Edwardian sash windows have the classic, traditional look with frames of different widths and a huge variety of different shapes. Our range from slim frames with maximum glazing area to large, bulky sashes. Whatever dimensions you choose, these traditional windows will look great on your house.

Venetian Sash Windows

Venetian sash windows are a popular style of window because they never close all the way, creating a cross-breeze to keep you cool on hot days. A Venetian sash window is generally divided into three parts: the top sash (the moveable portion), which is designed to tilt up and down (it’s this component that can easily be opened or closed when you want more or less air circulating in the room); the bottom sash, which functions as an integral part of the entire window unit; and the middle sash, which allows light in.

Horizontally Sliding Sash Windows

Horizontally sliding sash windows create an elegant look with lots of functionality. The sashes slide left and right to vented or unvented positions. Note that horizontally sliding sash windows are much more common in older properties, therefore they are often referred to as old-style uPVC sash windows.

Hidden Spring Sash Windows

Hidden spring sash windows are one of the most common types we install. Hidden spring sash windows have a multi-point locking system that uses cranked sashes and a spring-loaded catch to hold and lock the sashes in position.

Traditional Sliding Sash

The traditional double sash window is a classy addition to any home. It has two horizontally sliding sashes made of timber that can be opened by cranking the lay of the window. This type of sash window is usually more affordable and easier to maintain than some other alternatives. The traditional double sash window also allows plenty of light indoors as it installs directly into your existing frame.

Bespoke Sash Windows

Bespoke Sash Windows are a traditional bespoke double glazed sash window, manufactured to your exact measurements and supplied with glazing bars, parting beads and in some cases, cills. We can install these windows in any property (even listed ones). If you have a particular design or size in mind for your sash windows, then we can help you achieve the look you want.

Our Guarantee

  • Unrivalled Expertise in Door & Window Glazing
  • Industry-approved Door & Window Glazing
  • High-quality Door & Window Glazing
  • Unbeatable Value for Money
  • 100% Safety and Satisfaction
  • Checkatrade Registered
  • Homepro Insured
  • CERTAS Guarantee

What Are The Features of Our New Sash Windows?


  • Fitted with Spiral Balances
  • Concealed Gaskets
  • Lead-Free and Recyclable
  • Weights and Pulleys
  • Double Draught Sealed

What Are The Benefits of Our New Sash Windows?


10 Year Guarantee

Sash Windows are not just attractive; they keep you warmer in winter and cooler in summer, filled with uPVC to keep out rain, but still allowing air to circulate. We offer a 10-year structural guarantee on all Sash Windows and Fixed Panel Doors.

High-Security Windows

The improved sash window we are offering you is extremely secure. You can easily lock all of its components using a lock-set that comes with the purchase of each individual window. We also install a modern security glass which makes it impossible to break and provides additional protection against unwanted entry into your home.

Increased Energy Efficiency

Sash windows can be installed on any period property, no matter the age or condition. With the moderate depth of sashes, they make great use of ancient and modern techniques to provide excellent energy efficiency with effective insulation.

Low Maintenance

Our sash windows can be easily maintained at the same time as you are enjoying your home thanks to their durable construction and design which keeps out dust, humidity, and unwanted pests.

Functional Tilt Function

The functional tilt is a feature on the New Sash Window which slides to reveal ventilation in the top portion of the window. The function allows you to open your window wider, allowing light and air into your home while saving you from having to open the entire window.

Extensive Colour Options

Stay in the spotlight with our extensive colour options. Our large selection of colours makes your home colourful, invigorating and attractive. We offer you numerous choices when it comes to getting a vibrant look for your house windows.

Replica Hardware

For a traditional look and feel, period fitting replica hardware is essential. Our sash windows come with a choice of all-metal or colour co-ordinated acrylic handles

Fully Bespoke

All of our windows are fully bespoke which means we can alter the design and finish of the product to suit your home. They are manufactured specifically for you, with every aspect built to your specification to ensure a perfect fit for your property.

Superior Sound Insulation

If you’re trying to forget the sound of sirens outside your window or neighbours’ arguments that disturb your nights, then it’s about time you considered the benefits of our noise insulated sash windows. We can provide a wide range of noise insulated sash windows frames, which are framed in beautiful wood and come with double glazing.

Customise Your New Sash Windows

  • Colour
  • uPVC Colours
  • White
  • White Woodgrain
  • Cream Woodgrain
  • Anthracite Grey
  • Golden Oak
  • Rosewood
  • Golden Oak
  • Rosewood
  • Olive Grey
  • Anthracite Grey

Timber Colours

  • White
  • Cream
  • Agate Grey
  • Beige Grey
  • Chartwell Green
  • Light Oak
  • Mellow Teak
  • Warm Mahogany
  • Dark Walnut
  • Ebony

Request for a FREE Quote

We offer a variety of sash window repairs, new installations, maintenance, refurbishment and replacement services in London.

To find out more about our services, get free quotations, or arrange an appointment, call this number 020 452 51669.



uPVC Hardware

  • uPVC Sash Window Fitch Lock
  • uPVC Sash Window Lift Hook
  • uPVC Sash Window Sash Restrictor
  • uPVC Sash Window Clean Latch

Timber Hardware

  • Wooden Sash Window Fitch Lock
  • Wooden Sash Window Lift Hook
  • Sash Restrictor on a Timber Sash Window
  • Wooden Sash Window Pull Handle

Hardware Colours

  • Gold
  • Chrome
  • White

Sash Horns

  • No Horn
  • Through Horn
  • Plant-on Horn

Opening Mechanism

  • Spiral Balance
  • Cords and Weights


  • Lead Glass
  • Decorative Glass
  • Obscure Glass


  • Georgina Bars
  • Window Sill and Boards
  • Bay Configuration

Let Us Start a Project Together

If you need Box Sash Windows, go with Trade Timber Windows and Doors Sash Windows London. We are approved by Checkatrade and CERTAS, which means we have undergone a rigorous inspection process to ensure that we meet the high standards required. Trade Timber Windows and Doors London is one of the UK’s leading providers of box sash windows, with a wide range of styles available. Contact us for your FREE brochure today or call 020 452 51669 for a free, no-obligation quote.




If you need Box Sash Windows, go with Trade Timber Windows and Doors Sash Windows London. We are approved by Checkatrade and CERTAS, which means we have undergone a rigorous inspection process to ensure that we meet the high standards required. Trade Timber Windows and Doors London is one of the UK’s leading providers of box sash windows, with a wide range of styles available. Contact us for your FREE brochure today or call 020 452 51669 for a free, no-obligation quote.


Frequently Asked Questions

When should I bite the bullet and buy new casement sash windows?

This is a question that we, as a casement sash window installation company, are asked by our clients on a regular basis. The answer is quite simple; if your windows are not working efficiently then you need to look into replacing them ASAP.

Should I change my aluminium or timber casement windows?

It can be a hard decision to make and, of course, the type of window you choose should depend on a variety of factors such as budget, use and even how the home looks with a particular style. It could be that aluminium windows are less expensive than timber casement windows however installation and repair costs can vary greatly – it’s certainly worth having a discussion with your local builder before making these decisions.

What is a sash on a casement window?

A sash is a movable frame on casement windows that allows you to open and close the window. It basically controls how much light and air enters through your door or window. Traditional timber windows have two sashes.

Can you replace casement windows with sash windows?

Replacing the window’s original casement with a sash utilising the existing frame can be done for most windows that still have their original sashes, and maintain the character of the property.

Can you match the style of my existing windows?

Of course. We carry a wide range of window styles to complement your home’s architectural features. Each window is built using the finest materials in order to be energy efficient and maintenance-free for years to come.


Request for a FREE Quote

Trade Timber Windows and Doors Brighton has been making it easy to bring new life to your existing sashes – all you need is our specialist expertise in constructing and renovating period sash windows. We offer a free survey and advice on all aspects of our products and services, so feel free to ring today.

To find out more about our services, get free quotations, or arrange an appointment, call this number 020 452 51669.



Get a FREE Quotation