Box Sash Windows in Brighton, East Sussex

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 is a Box Sash Window?

People who are talking about old-fashioned, single-pane windows in a typical residential, period building use the term box sash window. The side pane is fixed and the window opens onto the inside of the building, unlike modern double-glazed windows that open outwards from hinges set into the frame.

Traditional box sashes were often painted white on two sides to reflect sunlight from the inside of the house but they can also be unpainted wood to allow the quality and natural grain of the wood to show through. If you like the authentic traditional charm of box sash windows, you are on the right page. We have what it takes to install long-lasting box sash windows in your Brighton property.

Our Box Sash Windows Services

Trade Timber Windows and Doors Brighton is a leading sash window specialist company in Brighton and the surrounding areas. We have been helping homeowners reclaim their original architectural windows for over 10 years. There is no better way to bring back that old world charm and character into your home than by bringing back the original glazing and sash window style. Since we specialise in using traditional methods to restore your sash, you can be sure of the highest quality service. Whether it’s a full restoration or some refurbishment to give your windows an extra touch of class, Trade Timber Windows and Doors will deliver with professional craftsmanship and attention to detail. Our Box Sash Windows services include:

Box Sash Windows Supply

Trade Timber Windows and Doors Brighton is a family run business offering a wide range of services to homeowners, landlords, builders, developers and managing agents. We supply and install quality box sash windows with easy clean glass available in any colour and standard double glazed units. We offer quotations for the supply of windows in your classic property. Our service is fully guaranteed.

Box Sash Windows Installation

With over 10 YEARS’ experience in the industry, specialising in Box Sash Windows installation, we are on hand to help both domestic and commercial customers when it comes to the installation of box sash windows anywhere in Brighton, Hove, Sussex & Surrey. Our team of experienced professionals are available to provide you with a range of home and business improvements. Get in touch today for a quote free no obligation quote.

Box Sash Windows Replacement and Repair

Our precision workmanship in box sash window refurbishment and box sash window replacement using traditional methods suits a number of architectural styles including Victorian, Georgian, Edwardian & Arts & Crafts.

Box Sash Windows Maintenance

Ace Glazing, specialists in sash windows provide a wide range of professional maintenance services on your existing frames and glazing. If you need a box sash windows maintenance, don’t hesitate to call us.

Types of Box Sash Windows We Supply and Install

Trade Timber Windows and Doors Brighton have been trading for over 10 years and we are a family run business with a wealth of experience in the sash window and box sashing trade. We supply, manufacture and fit quality traditional box sash windows to match the original specification to both domestic and commercial customers in Brighton. If you are looking for a more traditional feel to your home, then Box Sash Windows may be the ones for you. With the ability to fit into existing buildings they work perfectly, we offer a variety of box sash windows styles and types:

Timber Box Sash Windows

Trade Timber Windows and Doors Brighton can install your new timber box sash windows in any property type. You don’t have to live within a historic building to appreciate the benefits that box sash windows offer.

Whether you live in a terraced home in Brighton, in the countryside or a town of any size – we provide a bespoke sash windows service that is designed for your homes exact specifications and needs. These windows are available in a wide variety of glazing options from sealed units to leaded lights. Our experienced team of glaziers can help fulfill your visual requirements exactly how you want them while keeping within your budget.

uPVC Box Sash Windows

uPVC Box Sash Windows are a great option if you want to introduce natural light into your home without losing some of the security that your traditional sash windows can bring. They are from PVC, and so have low U-values and high thermal insulation properties, allowing for significant energy savings. Our top quality uPVC box sash windows are crafted using modern technology to produce a timeless window, made to the original design specification and ready for installation by your local tradesman.

Available in multiple colours, these traditional windows are offered with single or double glazing options. Not sure about the Box Sash Windows option to choose? Call us on 01273 257 597 for consultation.

Benefits of Our Box Sash Windows

Low Maintenance

Box sash windows are the most durable and long lasting choice for your home. With little maintenance required, it means that you get no more repairs or keeping your eye on rotting frames so you can finally spend less time maintaining your home and more time living it.


Authenticity is a big deal to many people. With the increasing popularity of period properties and the yearning for a return to simpler times and improved environmental awareness, there is no better time to step through our doors. If you have a period property with box sash windows, the authentic look of a handmade box sash window, cut with an artisan’s precision and beautifully finished by our expert team in our workshops can breathe new life into your home without compromising your values.


Our box sash windows are highly durable. The timber used in their fabrication is of high quality and the design of the window only serves to enhance its durability. Box sashes can stand up to extreme weather conditions, thanks to their construction, which includes reinforcing crossbars at the top and bottom holding them together with diagonal tension beams at each corner.

Excellent Acoustic Performance

Whether you’re in your home or office, good internal acoustic performance is essential. Trade Timber Windows and Doors Brighton, Box sash windows have been designed with the help of our leading acoustic partners to provide excellent levels of noise reduction for internal spaces.

Twin Gasket System for Weatherproofing

The Trade Timber Windows and Doors Brighton box sash windows are resistant to water damage. They are weatherproof, ensuring they can resist water coming in and out from opening and closing them multiple times. They can also keep moisture locked out, even during the worst storms.

Highly Energy Efficient

If you are looking for a cost effective way to improve your home’s energy efficiency, then investing in some box sash windows is the smart choice. It gives you the best of both worlds; they look great, come in an extensive range of designs, and are highly energy efficient.

Increases Security

The high-performance properties of triple glazed box sash windows, which can be fitted with toughened glass for anti-burglary purposes, help to make sure the security of your family and possessions. Also, box sash windows come with unique folding mechanisms that play a major role in increasing the level of security at your property. Our sash windows are designed with four security settings that enable you to keep intruders out while letting fresh air in.

Heavily Customisable

Trade Timber Windows and Doors Brighton offers customised and heavy duty sash windows for buildings, homes and offices in Brighton. They can be customised to suit the client’s requirements and this will include seals, size and colour.

Multiple Glazing Options

We offer you multiple glazing options to suit your needs and improve the look of your property. These windows are available with up to three glass panes which help to reduce heat loss throughout winter and provide a pleasant outlook as well as enhancing security in warmer weather.

Hardware Accessories of our Box Sash Windows

  • Solid Sash Lift
  • Cast Sash Lift
  • Pressed Sash Lift
  • Push Lock
  • Angel Lock
  • Round End Sash Stop
  • Cill Lock
  • Solid Ring Pull Sash Lift
  • Ring Sash Lift
  • Mighton Fitch Fastener Locking
  • Croft Lockable Fitch Fastener
  • Sliding Sash Fitch Fastener
  • Sash Pulleys
  • Vent Lock


  • Oak Stains
  • Idigbo Stains
  • Sapele Stains
  • Opaque Colours
  • Ash
  • Autumn
  • Ivory
  • Grove
  • Ghost
  • Calm
  • Cadet
  • Bristle
  • Lawn
  • Lilly
  • Marsh
  • Milk
  • Mist
  • sandscript
  • Powder Blue
  • Porcelain
  • Polar
  • Moon
  • Sea Green
  • Seashell
  • Slate

Customise Your Box Sash Windows

  • Timber
  • Engineered Redwood
  • Red Grandis


  • Standard and made to measure sizes
  • Single, double, and triple glazing
  • Bar design options
  • Engineered using laminated timbers which increase product durability, lifespan and reduces maintenance
  • Espag locking window gear
  • Height up to 3 meters
  • Finished products in white or other colours
  • Traditional or contemporary ironmongery features
  • Full instructions for self-assembly and installation
  • Twin gasket system for weatherproofing
  • Increased ventilation with lockable mechanisms on open windows
  • Flush window systems available
  • Fully tested and approved gaskets and seals
  • Glass is toughened
  • Good thermal performance (minimal heat loss)
  • Good security performance (thanks to effective locking mechanisms)
  • Good weather performance (durability against weathering, heat loss, UV damage)
  • Good acoustic performance

Glazing Options

  • Historic Single Glazing
  • Slim Double Glazing
  • Double Standard Glazing
  • Contemporary Triple Glazing


  • Paint Finishes
  • Standard Paint Finishes
  • Pure White
  • Traffic White
  • Other Finishes
  • Oyster White
  • Traffic Red
  • Light Ivory
  • Zinc Yellow
  • Yellow Orange
  • Night Blue
  • Claret Violet
  • Gentian Blue
  • Mint Turquoise
  • Pale Green
  • Cream
  • Basalt Grey
  • Pastel Turquoise
  • Cement Grey
  • Pebble Grey
  • Silk Grey
  • Jet Black
  • Stain Options
  • Amber
  • Honey
  • Bright Oak
  • Shamoy
  • Bright Walnut
  • Golden Oak
  • Saffron
  • Teak
  • Afrormosia
  • Copper
  • Cocoa
  • Calvados
  • Chocolate
  • Burgundy Red

Glass Type

  • Chantilly
  • Everglade
  • Digital
  • Contora
  • Charcoal
  • Florielle
  • Mayflower
  • Minster
  • Oak
  • Pelerine
  • Taffeta
  • Warwick

Features of our Box Sash Windows


  • Weights and Pulleys

    All windows are fitted with a counterweight on the outside to compensate for the weight of the window within the frame. Weights are particularly important in multi-sash windows as this allows even balancing and then contributes significantly to the performance of our frames.

    All sashes have stainless steel pulleys, backed up with a heat-treated roller chain, making them durable, maintenance free and easy to use.

  • Independently Tested

    Our box sash windows are with high-quality timber and the best quality hardware. We are highly recommended throughout Brighton.

  • Guaranteed Performance

    When you buy an e-commerce product, online retailers often offer just a few of the usual guarantees. Not at Trade Timber Windows and Doors Glazing. At least a 10-year performance guarantee protects all our products.

    We’re so confident in the quality of our Box Sash Windows that we’re prepared to give you your money back if they ever let you down. All of our windows have been manufactured to a very high standard. We offer a full guarantee on every window we make. As a result, we are able to provide a guarantee of 40 years for the paint finish.

  • Internal Beading

    The majority of our windows have internal beading. This creates a smooth appearance, enabling paint to easily go over the surface of the window casing and provides a clean finish for your home. The traditional bead and cell is an essential feature in our sash windows. It holds the glass firmly in place, provides a weather seal and brings out the character of a wooden window.

  • Double Draught Sealed

    Draught Proofing is an important factor in the design of all our Box Sash Windows. They are double-sealed, sash-to-sill with a side-hung slotted ventilator above and below to remove warm air through the frame and seal the window tightly against winter draughts.

  • Lockable Fitch Fastener

    The lockable Fitch fastener on our box sash windows is a unique and invaluable security feature. In case of any unwanted entry, this lock will prevent the window from opening fully. The lockable fitch fastener can be locked back from the outside reducing the risk of theft and vandalism. Call us today on 01273 257 597 to get more information on our Box Sash Windows.

What are Trade Timber Windows and Doors BrightonBox Sash Window Ranges?

Box Sash Tilting

Perfect for a contemporary look, the Box Sash Tilting range provides a smooth opening tiltable window system with height adjustment. 3-5% glazing increases the efficiency of your windows and glass can be removed individually to avoid overheating. Suitable for many types of frame, they offer low running costs and easy cleaning.

Box Sash 3 (Sliding Sash)

With a choice of both traditional and contemporary aesthetic details the Box Sash 3 window is perfect for any period home. In addition to stunning aesthetics, Box Sash 3 is a sliding sash window that offers the same good looks as our other box sash models but includes an uplift sash to further minimise draughts.

Box Sash 4

The Box Sash 4 is a beautiful traditional sash window, which were the common form of windows found on most homes built before the Second World War and which are still commonly found in older properties today. Contact us today for a FREE no-obligation quote.

Why Choose Trade Timber Windows and Doors Brighton for Box Sash Windows?

Competitively Priced

Trade Timber Windows and Doors Brighton is one of the top choices for box sash windows across the South East, we strive to give our customers a professional and efficient service. All our windows are competitively priced, meaning you’re getting nothing but exceptional value for money.

Fully Bespoke

Trade Timber Windows and Doors Brighton offers the best quality bespoke double glazing, traditional timber box sash windows in Brighton. Made to measure for all types of properties and building styles, we are committed to providing year round double glazing solutions to help you save money on your heating bills.

Extensive Guarantee

All our box sash window frames, whether new or replacement come complete with a lifetime guarantee. If you are considering a purchase of a box sash window from any other supplier, make sure the final quality and guarantee will not be compromised.. If you’re not satisfied with the workmanship, just let us know and we’ll come back and make it right.

Friendly Customer Service

Trade Timber Windows and Doors Brighton guarantees you a friendly service and will go out of our way to find the best solution for your needs. We listen to our customers and are proud of our reputation for quality, reliability and excellence. Trade Timber Windows and Doors Brighton offers an unrivalled service in terms of response time, reliability and attention to detail.

Accreditation and Experience

We have a long-standing history of providing top quality & professional sash window repairs and installations backed up by recent accreditation from FENSA. All our tradesmen are accredited, and each one has the experience to deal with your home as if it were their own. Choosing Trade Timber Windows and Doors Brighton, you can be rest assured that all aspects of the service will be completed to the highest standards, with the safety of your property in mind at every step.

Areas We Cover in Brighton

Trade Timber Windows and Doors Brighton is a Sash Window specialist business based in Brighton, East Sussex, covering all of Brighton, Hove and surrounding areas for all your sash window needs. Some other areas we cover in Brighton and it’s environs are: Hove, Seven Dials, Preston Park, London Road, Kemptown, Bolney, Haywards Heath, Findon, Newick, Shoreham, Patridge Green, Henfield, and Ditching.

If your area is not listed, please don’t hesitate to give us a call on 01273 257 597 and we will connect you to one of our trained craftsmen close to you.

Let Us Start a Project Together

Trade Timber Windows and Doors Brighton has been installing sash windows in the Brighton area for over 10 years and still prides themselves on offering a personal service to customers. Our wide range of box sash windows can be made to any size, width and height.

To find out more about our services, get free quotations, or arrange an appointment, call this number 01273 257 597.


Frequently Asked Questions

How long do sash windows last?

Sash windows are always a popular choice for period properties. All sash windows can be expected to last approximately 80 years, however they can easily last longer. Horizontal boarding on all window sills and frames will help keep your existing sash windows in top condition for many more years.

Are sash windows expensive?

Buying a box sash window from Trade Timber Windows and Doors Brighton is a sensible financial move. Sash windows are great value for money.

Do original sash windows add value?

Original windows can increase a property’s value. In fact, there is no greater way to bring character to a period home than through the use of traditional style sash windows. By installing box sash windows you are not only ensuring that your old home is well insulated but also that it looks good.

How much does it cost to restore sash windows?

The price of timber box sash windows depends on the condition of existing materials, labour costs and how many products are required for restoration.

Can you just replace the window sash?

Yes. If you want to be able to control the opening of your window, or just want a new colour to brighten up your home, we can provide you with a new window sash. We can even replace the glass in your windows for those of you who haven’t had your antique windows double glazed yet.

Can you match the style of my existing windows?

We will work to match the style of your existing sashes; we are able to offer a variety of painted colours and glazing styles including Georgian, Victorian, Edwardian, Queen Anne and casement or sliding.

I live in a listed building and/or conservation area, are you able to work on my windows?

Working with listed buildings and conservation areas is one of our specialties! We have performed works on many of these properties throughout Brighton. We are happy to discuss interior and exterior works you may require or if you just want to set up an appointment for a quote please contact us directly to book an appointment with either one of our sales teams.

How do I get an estimate?

The easiest way is to complete the online request form. You’ll be contacted by a member of our team, who will send you a link to an online quote form, which you can then fill in and submit. There’s no obligation to purchase from this site, even after completing our online request a quote form.


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