Best Sash Window Companies

Sash windows, also known as hung sash windows, comprise of sashes that can be easily moved or slid. The top and bottom (sometimes these are side to side) openings help create a constant convection air current. Therefore, these are perfect for ventilation of air during summers.

If you are interested in getting sash windows installed inside your home, then you might want to take a look at our guide. Keep reading to find out more about sash windows!

Table of Content

The Best Sash Window Companies In The UK February 2024

Looking for the companies that offer sash windows? Interested in ones that have been voted the best in February 2024? Keep reading to find out!

1. Super Sash Windows

Super Sash Windows are a leading sash window installer that work across the UK. This business have an excellent reputation throughout the country of offering extremely high quality sash windows at competitive rates, and their craftsmanship and professionalism is known for being second to none.

Best For

Quality, Reputation, Work Nationwide


  • Box Sash Windows
  • Spring Cash Windows
  • Georgian Sash Windows
  • Victorian Sash Windows
  • Edwardian Sash Windows
  • Aluminium Sash Windows
  • Composite Sash Windows
  • Timber Sash Windows

2. Premium Sash Windows

Premium Sash Windows are another example of a brilliant sash window business that offer some amazing options for it’s clients. This business also work across the United Kingdom, so there’s no need to worry about whether they can work in your location.

Best For

Competitive rates


  • Victorian Sash Windows
  • Spring Cash Windows
  • Aluminium Sash Windows
  • Box Sash Windows
  • Timber Sash Windows

and more.

3. Expert Sash Windows

Expert Sash Windows are also a great example of a brilliant sash window business, operating throughout the United Kingdom to provide a brilliant service for their clients. Expert Sash Windows have a variety of different sash window options to suit, and are well-priced for the market.

Best For

Good variety of sash windows


  • Composite Sash Windows
  • Georgian Sash Windows
  • Box Sash Windows
  • Edwardian Sash Windows
  • Timber Sash Windows

and more.

4. Doorwins Aluminium Windows and Doors

Doorwins has over 10 branches across the UK and boasts an experience of 40 years. They are popular due to their excellent customer service, high quality, affordable prices and the ability to match the client’s demands. They deal in windows, doors and even glazing.

Best For

40-Year Expertise


  • Hung Sash Windows
  • Casement Windows
  • Awning Windows (aluminum)
  • Panoramic Windows
  • Tilt And Turn Windows (aluminium)
  • Bifold Doors
  • Sliding Aluminium Doors
  • Front Doors
  • Glazing

5. The Original Box Sash Windows Company

The Original Box Sash Windows Company is another big name. They are known to combine traditional skills, craftsmanship and client trust. This company was created in 1979 by a local family that believes in reviving traditional art and creativity of past eras. They offer a free visit to help you develop a suitable design for your windows and doors.

Best For

Revival Of Traditional Art


  • Sash Windows Hung
  • Bifold Doors (timber)
  • Exterior Doors
  • Casement windows
  • French Doors
  • Draught insulation And Glazing
  • Window Servicing

6. Premier Windows Ltd

Premier Windows Ltd promises to beautify your home perfectly owing to their 40-year expertise. The company offers excellent customer service and continuously adapts to modern styles and technology. They are popular for the correct fulfilment of client demands and hassle-free service.

Best For

Excellent Customer Service


  • uPVC Window Installation
  • Wood Window Installation (timber)
  • Easy Replacement of Any Doors/Windows
  • Premier Doors

7. Anglian Home Improvements

Anglian Home Improvements is famous for its high-quality windows; it also marks its name in the industry due to its perfect installation and friendly customer service. They offer a 10-year guarantee on their services.

Best For



  • uPVC Frame
  • Aluminium Windows
  • Timber Windows
  • Double Glazing
  • Triple Glazing
  • Secondary Glazing
  • Sash Windows

8. Everest

The Everest company offers to install five different styles of windows with a 10-year guarantee. If you pick timber windows, you will get a 30-year warranty covering rotting and fungal damages. They have pleasant customer service, but they are on the pricier side. Plus, they offer a lifetime guarantee on uPVC frames for discolouration.

Best For

Extended Warranty


  • uPVC Frame
  • Conservatories
  • Sash Windows
  • Casement Windows
  • Secondary Glazing
  • Bay Windows
  • Tilt And Turn Windows
  • Timber Windows
  • Entrance Doors
  • Bifold Doors
  • Patio Doors
  • French Doors
  • Composite Stable Doors
  • Garage Doors

9. Ayrton Windows & Doors

Ayrton Windows & Doors promises to replace old wooden doors and windows with better, modern ones. The professional product quality combined with aftercare has attracted many clients. They use redwood for their products.

Best For

Professional Industrial Quality


  • Aftercare Services
  • Installation
  • Windows
  • Doors

10. Advanced Woodford Glazing Company

Advanced Woodford Glazing Company is well-known for its strong team of glaziers and modern techniques. Plus, they offer quotations free of cost and are also willing to advise you on what will look good. The company boasts an experience of 40 years and offers discounts to its customers whenever possible.

Best For

Professional Team


  • Double Glazing
  • uPVC Windows
  • Glass Repair
  • Boarding Up
  • Secondary Glazing
  • Handle Repairs
  • Safestyle UK

Safestyle UK caters to clients looking specifically for uPVC windows and doors. However, they do offer various window styles. The Legacy Sliding sash and Eco Diamond windows offered by the company have been endorsed by the Energy Saving Trust.

Best For

Perfect Installation Service


  • uPVC Sash Windows
  • uPVC Casement Windows
  • uPVC Bay Windows
  • Tilt And Turn uPVC Windows

What To Look For When Choosing A Sash Window Company?

So, what should you look for when picking out a company for sash window installation and repair? Below is a quick checklist:

  1. Look Into The Company’s Reputation

If a company is good, it shall already be famous and well-known. A company with an existing client base indicates top quality, excellent service and professionalism. You should always look at customer reviews and check out social media pages to see what others have to say about a company’s products and services.

2. Research On Guarantee Information

Whether you opt for replacements, completely new installations or even repair, it is essential to find out what guarantee backs up products you are purchasing. An extended warranty or lifetime guarantee will help you keep your windows and doors in good shape for years to come.

3. Avoid Getting Lured By Salesmen

Be wary of salespeople. Most companies hire them to talk about products and services so that customers can be lured towards the company. A confident salesperson does not necessarily mean a company is good. Never get pressured into signing up for a service without research. A good company will have a team of consultants that you can reach out to via email, chat or call.

4. Read Up Previous Case Studies

Aside from reading reviews, it is also a good idea to look up case studies. Older case studies show what a company is capable of, what its strengths are and how it overcame its weaknesses. You can also reach out to older clients for even more realistic opinions.

5. Question About Recommended Products

If a company is known for certain products and services, it does not necessarily mean they are experts at all products. You should always ask about and research more on the product or service the company is best known for.

6. Style And Quality

This is an obvious one. If you are looking for a particular style, you must look for a company that offers it. Plus, you will also need to ensure that quality is top-notch. A good company offers products that are durable and long-lasting. A few styles you might want to consider include:

  • Contemporary
  • Traditional or classic style
  • Urban design
  • Industrial decor
  • Modern
  • Minimalist
  • Scandinavian style
  • Vintage
  • Rustic
  • Bohemian
  • Art deco
  • Mid-century modern

7. Other Factors To Consider

Product quality should not be the only thing you consider; many other factors also come into play. You should research upon:

  • Colours
  • Delivery Time
  • Company Location
  • Durability And Comfort
  • Additional Features
  • Designing
  • Material And Quality
  • Affordability
  • Size And Style
  • Warranty

8. Get Quotes

Once you have narrowed down a few companies, it is wise to get quotations from all of them. This will help you deduce which company is the right fit for you.

What Accreditations Do Reputable Sash Window Companies Have?

In this section, we shall look at 6 accreditations a good sash window company must offer:

QA National Warranties

QA National Warranties or QANW offers protection on deposits made by the buyer. A good company will offer QA National Warranty and protection on all other guarantees.


A FENSA registered company backs up window and door replacements. This accreditation ensures that any replacements will comply with building rules and regulations. FENSA issues a certificate to make it easier to buy or sell your property whenever the need arises.

Which? Trusted Trader

Which? Trusted Trader tests companies to check if specific standards are met and whether they comply with the code of conduct. Only the best companies can receive this accreditation.


FSC ensures that all windows and doors are made from timber sourced legally and will not harm the environment. They are endorsed by WWF, Greenpeace and the Woodland Trust. FSC makes annual checks on registered companies.

Made in Britain

The Made in Britain logo indicates whether products have been created in the UK or imported from abroad. This helps local people in knowing about British companies and supporting them. Plus, it is easier to reach out to companies established in your region.


SafeContractor ensures a window company practices health and safety policies. These policies have been derived in compliance with industry standards. A company awarded with this accreditation will keep the health and safety of your family and neighbours in check while they work on your property.

What is a Sash Window?

A sash is a singular frame that sits inside a wooden frame. It may be paned, but most modern windows only have a sheet of glass.
Casement windows offer a crank handle to allow users to open and close the window. In comparison, a double-hung sash window has two sashes. One is usually fixed in place while the other slides up and down or side to side.
Horizontal sliding sashes are known as slider or Yorkshire sash windows. Sash windows are a prominent feature in Georgian, Victorian and Edwardian houses.

How Does A Sash Window Work?

Older sash windows have an inbuilt system that balances the sashes with steel, cast iron or lead weights. These weights are hung inside the box frame via a cord.
Alternatively, modern sash windows use a spring balance system that keeps the windows open using gravity.

Advantages And Disadvantages Of Sash Windows


  • Sash windows revive traditional, classic art.
  • The windows enable a good air convection current which helps in keeping rooms cool.
  • Windows can be locked even when open, so fewer security threats exist.


  • The windows are a bit costly.
  • Maintenance may be tedious due to the intricate system.
  • Painting sash windows requires skill and patience.
  • It cannot be opened fully like double casement windows.

Are Sash Windows Worth The Investment?

Sash windows are a great addition to homes built using traditional construction techniques. These are also perfect for properties built using 17th and 19th-century art. Sash windows are pretty expensive, but they are far more durable than PVCu and timber.

How To Identify Different Styles of Sash Windows?

Sash Windows built-in different eras flaunt different characteristics. A sash window consists of small panes/lights and astragal bars. Let us look at the characteristics of these windows in each era:


The ‘six over six’ and ‘eight over eight’ style indicates the Georgian style. The sashes were divided into six or eight sections in Georgian houses.


The ‘two over two’ style was popular in the Victorian era. Some other styles include a single light or pane and sidelights.


The Edwardian era had ‘six over two’ style windows. There were many variations in style during this period:

  • Venetian Windows: Consist of a centred sliding sash and dual fixed ones on both sides.
  • Queen Anne Revival: Composed of many panes in the higher sash than the lower one. The lower one had fewer arched panes.
  • Regency/Gothic Era: Horizontal sliding sashes were standard in this period.

Does A Sash Window Require A Lot Of Maintenance?

Timber windows need to be maintained for long-lastingness and beauty. However, modern wood stains and other chemicals can help preserve these windows better. You can DIY regular maintenance jobs, but for a thorough service, you should contact a professional.
Always get your windows serviced every five years for cracks and flaking. Keep a lookout for wood swelling, rotting or fungal attacks.

Can You Double Glaze Sash Windows?

New building regulations require double glazing and sustainable timber. Therefore, you can and should double glaze your sash windows. Double glazed windows increase energy efficiency, and replacing single glazed windows is not a bad idea. However, it would help if you were careful that the look of the window is not ruined.

An excellent way to add double glaze to windows is by adding mock bars. You could also opt for spacer bars that will go in between glass sheets. These are expensive but will amp up the look significantly.

Many companies also offer triple glazing, but this could be even more expensive.

Can You Replace Sash Windows?

Yes, it is quite possible to replace old sash windows. It is a good idea to save up the timber from old windows to incorporate into new ones. Also, you can make use of the box sash and old frames to make replacements budget-friendly.
If your windows cannot be water-proofed, restored and revived at all, then you may need to opt for new windows.

The Best Material For Sash Window Replacement


People that love traditional art and construction prefer timber windows because plastic is unable to give that vibe and feel.

Pros of Plastic

  • Plastic is durable.
  • It is a good insulator.
  • It can be painted and amped up using various stains and colours.


PVCu or uPVC is an excellent substitute for timber. It is primarily installed in white but available in varying finishes and colours.

Pros of PVCu

  • Easy to maintain.
  • Increases energy efficiency.
  • Affordable and costs are 40% less than timber.
  • Attractive looking and durable.


Composite windows have a timber interior and aluminium cladding exterior.

Pros of Composite

  • Flaunt the classic wooden look.
  • Very easy to maintain.
  • Weatherproof.

How Much Do Replacement Sash Windows Cost?

New sash windows will cost more than just minor replacements or adding casements. PVCu windows are the most affordable option but lack the look and feel of timber.

The average cost will be as follows:


A large sash window will cost around £950.


Timber and composite windows start from £1,300.

Repair or Replace Sash Windows?

Several issues with old timber windows can mostly be fixed easily. This includes foggy glass, rotten window frames and colliding sashes. Professionals will usually be able to determine whether you need a repair or replacement. However, it is still always up to the customer to make the final call based on their budget.

Pros of Repairing Sash Windows

  • The beauty of the house is retained.
  • Better insulation can be achieved by opting for double glazing.
  • The box frame can be easily water-proofed.
  • Original timber is durable and long-lasting.
  • Repaired windows may last an additional 100 years compared to modern products.

How Much Will It Cost To Repair A Sash Window?

Upgrading single glazed windows is a brilliant idea whether you keep the original frame or replace it. Adding new sashes and frames should also be no big deal for a professional. Adding new sashes to existing window frames should cost you about £1,000 for each window.

A Complete replacement will cost around £1,750 for each window depending on modifications such as glazing, timber replacement and other detailing.

How to Clean Sash Windows?

Older sash windows only allow access to one sash when the window is open. To clean the other sash, you will have to clean from the outside.
Modern sash windows often incorporate inverting sashes that aid the cleaning process.


We hope you found this guide useful.

Now that you know everything about sash windows, it is time for you to start your research on the best company for your needs.

Once you do that, get sash windows installed in your home right away to amp up the look!

All Sash Window Companies

Here is a full list of all sash window companies in the UK:

The list above gives you plenty of options to choose from in February 2024.