Sash Window Fitters in London

Regardless of how great-looking your sash windows may be, it is still vital that a specialist window fitter helps you with the installation to get the most out of your beautiful set of new windows.

Besides, there are a number of safety precautions that must be taken into consideration when installing such a window, which Trade Timber Windows and Doors London expert fitters are well skilled in.

If you already have your windows ordered, we can take over the installation process for you. Our fitters can come to your business or private residence at a time that is convenient for you and get the job done with precision.

At Ace Sash Windows London, we make sure you get exactly what you want, at a price that fits easily into your budget.

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
  • Fantastic service and improved performance benefits
  • Checkatrade Registered
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  • CERTAS Guarantee

What are the types of sash window fitting we offer?


A basic fitting means removing the old and installing the new. Often the good condition of the existing frame helps reduce costs here.

Traditional Basic-Fit is the cheapest and most popular “fix.” It is usually undertaken when replacing-sashes-only is required, or when irregular sashes are not available. In this case, they are replaced with a new pair containing a window fitter’s standard specification of glass and putty. They can also be used to replace rotten wood in older sashes.

Our Basic-Fit service involves the replacement of your existing glass or glazing bar with high-performance low E glass.

This will guarantee an immediate improvement in your windows’ energy-efficiency level.

Our Basic-Fit sash window fittings are suitable for window sills that aren’t too old or damaged. A Basic-Fit is ideal if you want to make your windows draft-proof or if you have just moved into your property and want it redecorated before you move on with the rest of the work.

Complete Fit

A ‘complete fit’ is when we get everything done at the same time. The complete fitting involves cutting fit, protection of your property and a lot more. This means we come along and fit the window in one visit.

Some window fitting companies will only deal with the sashes and frames. However, we offer a complete fit, so you are covered from the moment you call us to well after your sash windows are installed into your property.

We offer a complete fitting service that is available 24/7 and never charge extra for weekends, evenings and bank holidays. It includes rough draught-proofing, fixing of existing sash cords, tidying, painting and letterboxing all new glazing.

We Are Also Available to Offer Sash Windows Related Advice Where Needed

Get in Touch With us for Your Sash Windows Quotes

Types of sash windows we fit

Box Sash Windows

Create a classic and unique look that will last for many years by having us install original style wood box sash windows in your home.

We have been fitting Box Sash windows to the highest standards for 10 years. Our box sash window installations are made with scrupulous attention to detail and we always make sure that they look as authentic as possible by using traditional mortise and tenon joints.

We fit and restore box sash windows in London and surrounding areas and across all period locations. Our window craftsmen are trained to fit all types of box sash windows and carry out a perfect job that’ll keep you happy and satisfied.

Timber Sash Windows

Turn to us for your timber sash windows fitting. Let us make your windows work harder with our double glazing and draught-proofing solutions.

With over 30 years of experience, we are one of the top timber sash window fitting companies in London.

Need help? Talk to Our Experts

Contact us on 020 452 51669 for a free no-obligation quote.

Wooden Sash Windows

We have been fitting, repairing, and restoring traditional wooden sash windows since 2010, in addition to offering a wide range of other window types including casement, awning, and modern double glazing.

We pride ourselves on our expertise in restoring traditional sash windows to perfection using traditional skills and materials. Our workshop is equipped with the latest machinery for the accurate replacement of re-sashes, weights, and bottom track as well as traditional glass cutting equipment for our leaded light specialists.

Sliding Sash Windows

We are among the leading sliding sash window fitters in London. With over a decade of experience, we have provided top-level window sash services all across the London area. We offer reliable, off-the-shelf and bespoke sliding sash window fitting services.

Our highly trained joiners will install your new hardwood double glazed sashes or completely restore your windows to as close their original condition as possible. We have vast experience fitting windows of all different styles; so you can count on us to get the job done right the first time.

Casement Sash Windows

Casements are the most common types of sash Windows we fit, and they represent both original builders’ and period styles.

These lightweight panels swing inwards from the middle and hinge on one side. The channels that hold the glass are machined. Trade Timber Windows and Doors London can supply and fit a range of top-quality casement windows for your home.

Heritage Sash Windows

At Trade Timber Windows and Doors London, we love a good challenge. With over 10 years combined experience in the installation of windows, doors and conservatories, you can rest assured that our team has the expertise to carry out a sash window repair, sash window fitting or sash window replacement of any kind.

We have been fitting Heritage Sash Windows for more than two decades. At Trade Timber Windows and Doors London, we fit sash windows from a variety of Heritage brands and a range of sizes and configurations.

Bespoke Sash Windows

At Trade Timber Windows and Doors we are able to fit unique bespoke sash windows, designed and handcrafted to meet the requirements of most properties.

Get the expert help you need to get your project done right the first time. We provide a comprehensive range of services and back everything up with a guarantee that prioritizes our customers’ comfort and puts their mind at ease. Want to learn more? Contact our specialists today on 020 452 51669.

Styles of sash window we install

Edwardian Sash Windows

We fit period Edwardian Sash Windows in London. We cover the fitting of all types of Edwardian sash windows including single, double and triple glazed with modern-day frames or historic style.

Georgian Sash Windows

Georgian sash windows are classical, elegant and traditional. They are a popular choice for period properties and narrow or long window openings. Like all our products, our Georgian sash windows are fitted to the highest possible standards.

Victorian Sash Windows

We fit a wide range of Victorian sash windows to your exact specifications. Our range includes sliding sash windows, timber flush sash windows, glazed sash windows as well as other traditional period sash window styles.

Traditional Sash Windows

We are traditional sash window fitters, specialising in repairs, restoration and replacement of period properties. We are known throughout the industry as specialists in the restoration and ongoing maintenance of traditional sash windows.

So whether you are interested in renovating your existing period windows or going for a completely bespoke design, our expert team is here to help.

We Are Also Available to Offer Sash Windows Related Advice Where Needed

Get in Touch With us for Your Sash Windows Quotes

Glazing options for sash windows


Double Glazed Sash Windows

We have a wealth of experience in both the traditional and modern methods of installing double glazed sash windows. We are proud to deliver 100% customer satisfaction on all our double glazing sash window fitting and repair service.

Hire an approved local sash window fitter with the expertise to maintain, repair and restore your precious double glazed sash windows. You can be confident that your window will be both easy to open and draught-free and you won’t have to do any work yourself.


Triple Glazed Sash Windows

Triple glazing gives you better insulation performance than double glazing, but at a higher price. We triple glazed sash windows with ease and speed. Our expert glazing team will complete your project in a matter of days.

Get in touch with us on 020 452 51669 to speak to one of our experts.

Building regulations for sash windows

Do you require a building regulation quotation to fit your new sash windows? We are able to offer this service and guarantee compliance with all relevant building regulations.

We have been fitting sash windows for many years and work closely with all the main window manufacturers to ensure they comply with current regulations.

Sound-proofing for sash windows

At Trade Timber Windows and Doors London, we supply and fit soundproofing windows that are the product of collaboration with external fabricators, engineers and manufacturers. We also offer a bespoke fitting service to our valued clients within London, who recognise the value in our products and services.

Contact us today for soundproofing advice. We can offer you expert advice on how to seal in sound from noisy neighbours or traffic below your property. We can make your sash windows as soundproof as possible – a vital job if you live in an area where there is a lot of ambient noise.

You can call us now on 020 452 51669 or send us an email on

Draught-proofing sash windows

We provide draught-proofing sash windows services across London. Our team of experienced sash window fitters is available to come to your home and measure the windows that require draught-proofing. The measurements are taken with laser measurements, which is a very precise method of taking window dimensions.

We Are Also Available to Offer Sash Windows Related Advice Where Needed

Get in Touch With us for Your Sash Windows Quotes

Our sash window fitting process

Our installers will always treat your home with the utmost care and respect, seeking to minimise disruption, and keeping the work area clean, tidy, and safe.

If you are having our replacement windows or doors installed, we will remove the old windows and doors and safely bring them back to our workshop for safe disposal.

Our installers will also aim to clean up the immediate work area at the end of each day to a good standard.

How much does it cost to fit a sash window?

The cost to fit a sash window will depend largely on the size of the window, the material and finish you require as well as the style of frame. However, at Trade Timber Windows and Doors London, we can provide you with the cheapest estimate for your sash window.

Why choose Ace to fit your sash windows in London?

Accreditation and Experience

At Trade Timber Windows and Doors London, we have over 10 years of hands-on experience in the industry and are Accredited members of the Guild of Master Craftsmen.

Whether it’s sash repair or replacement, we do all our own work by hand, with no shortcuts. You can always expect us to value you as a customer, respect your time and money, and treat your home and belongings with care.

Not only that, but we really understand the period charm that these old windows bring to a house – which is why they’re so carefully restored during any sash window repair or refurbishment project we undertake.

Committed and highly trained team

We are committed to excellent standards of work, and our sash window fitters are carefully selected on the basis of their skills, experience and pride in their trade. We invest heavily in training them.

Excellent customer service

It is likely that if you are looking at our website, you have considered having sash windows fitted. Our aim is to listen and then understand what you really want through the different stages of your project.

With over 10 years of experience in the sash window sector, we offer a first-class service to all of our customers. From the initial visit to measure up your sashes, through to the fitting day, we are able to offer a level of service that is not easy to come by in this industry.

Quality sash window fitting

Fitting your sash windows is a laborious task and it’s worth paying a premium price for reliable, high-quality workmanship with an eye for detail and a dedication to getting it absolutely right.

We’ve been fitting sash windows in London and the surrounding areas for over a decade. You are sure to get quality service from us at some of the most affordable prices on the market today.

Request for a FREE Quote today!

Do you need a sash window fitted? Ace Sash provides a FREE no-obligation quotation. We are experts in repairing all types of sash windows: wood, metal and UPVC including restoration, repair, and conversion. Book your FREE callback today.


How long will it take to complete a sash window fitting?
This depends on how many windows you are fitting. If you fit one window, it might take less than a day – depending on the size, complexity and difficulty of the repair or replacement job. However, you can rest assured that all of our fitters have many years of experience and will carry out your job at a pace that is comfortable for you.
Do I need to be at home when the sash window fitting is being done?
No, you don’t need to be at home when the sash window fitting is being done. A professional sash window installer normally takes the measurements and then fits the windows on a later date when it is convenient for you. The price will be exactly the same, whether or not you are at home, as we always include our travelling time in our quotes.
How do you ensure the safety of my home?
Our sash windows are fitted using state of the art equipment. Furthermore, all members of our staff undergo comprehensive training before undertaking any work on site. This way, you can rest assured that your property is safe in our hands at all times.
I don’t know what kind of window to go for, how can you help me?
We are a specialist sash window company and have all the relevant expertise to help you choose the best sash for your property. Just give us a call and we’ll happily walk you through the different choices available, and make sure that you end up with exactly what you need. If you’d like to get an idea of the options available, then take a look at our guide to your sash windows.

We Are Also Available to Offer Sash Windows Related Advice Where Needed

Get in Touch With us for Your Sash Windows Quotes

Information about London.