Cardiff's Premier Double Glazing Installer - Windows, Doors, Conservatories and Roofs


Sash Windows

Our sliding sash windows boast an array of features to ensure you get the very best double-glazed windows in Cardiff, Newport and Swansea. These features include dual sliding sashes, traditional sash horns, sculptured Georgian bars, galvanised steel reinforcement, an array of hardware options, high-performance balances and highly secure locking systems.

The sash window traditional design is great for homes of all styles. Sash windows look stunning in a period home and add a unique character to contemporary homes. Our sliding sash windows blend the traditional design with modern materials to offer a reliable solution that stands the test of time.

What is a Sash Window?

A sliding sash window features two glass panels that slide vertically, thereby allowing for better airflow. The word “sash” refers to a frame that holds the glass. A sliding sash window typically features two sashes that slide up and down.

Our vertical sliders are stylish and made of quality materials. What’s more, they are easy to clean and maintain. The upper sash and bottom sash tilt inwards for easy cleaning.

If you are looking for a traditional look, we can fit your sash windows with Georgian bars or even astragal bars before finishing them with sash horns for added character.

Featuring a UPVC profile, our sliding sash windows are easy to maintain, energy-efficient and extremely durable. 

uPVC white sash windows
green sash windows cardiff

Green Sash Windows

Chartwell Green sash windows offer a unique and captivating twist on the classic sash window design. This distinctive color, inspired by the tranquil surroundings of Chartwell, Winston Churchill’s country home, exudes elegance and sophistication.

Our vertical sliding sash windows combine the style of traditional sash windows with the improved performance and structural reliability of modern materials, meaning that your vertical sliders will hold fast and stay beautiful with very little maintenance. A gallery of some of our installations is at the bottom of the page. We recently installed these Chartwell Green sash windows. They provide a perfect contrast to the stone frames.

Whether replacing existing windows in a period property or adding character to a new home, our beautiful UPVC sash windows are an excellent solution.

Traditional Window Sashes – Modern Benefits

  • A-rated as standard.
  • Thermally efficient.
  • Fully made to measure.
  • Wide range of colours.
  • Fully featured sculptured profiles.
  • Tilt inwards for easy cleaning.
  • Run through sash horns as standard.
  • Georgian or astragal bar finish available.
  • Comprehensive 10-year guarantee on all parts.
  • Optional upgrades available- anti-jemmy bar, deep bottom rail and child restrictors.
  • Reinforced with aluminium and galvanised steel.

Our vertical sliding sash windows are high on style and quality, and they come complete with an easy-clean facility for practicality. To complete the more traditional look, our sash windows can be fitted with internal Georgian bars or external astragal bars and finished with sash horns to add character.

georgian sash windows cardiff
black sash windows

Black Sash Windows

Black sash windows are a classic and elegant choice for adding sophistication to traditional and modern architectural styles. These windows feature a timeless design characterised by a black-painted wooden or uPVC frame, divided into multiple vertical panes, or “sashes,” that slide vertically within the window frame.

With a blend of classic elegance and modern convenience, black sash frames remain a popular choice for those seeking to elevate the style and charm of their living spaces.

The timeless sash window design and the distinctive black colour create a truly eye-catching feature that can elevate the visual appeal and character of any home, making it a popular choice for those seeking to add a touch of personality and charm to their living spaces.

If you think black might be a bit dark in your room, don’t worry. All our uPVC windows are available with dual colour options so you can keep your rooms light and bright inside.

Modern Sash Windows

Modern sash windows combine the timeless charm of traditional sash windows with contemporary advancements in design and materials. These windows retain the iconic vertical sliding functionality, but they are now constructed using innovative uPVC, offering improved durability and energy efficiency.

New double glazed sash windows often feature slimline frames and larger glass panes, maximising natural light and providing unobstructed views.

All our products have security features, advanced glazing options, and improved insulation. Sliding sash windows offer superior performance and are designed to meet the demands of modern living. They provide excellent ventilation control and easy maintenance, and can contribute significantly to the overall appearance and functionality of any building, combining the best of traditional charm with contemporary practicality.

uPVC white sash windows
new house in a conservation area with timber sash windows

Timber Sash Windows

There are over ten variations of standard timber sash window design plus bespoke design and the option of matching existing windows.

We are proud to be able to supply the slimmest timber frames on the market. Depending on the style and materials, it is possible to achieve A ratings with our range of timber sash windows.

Experience the perfect finish for our timber sash windows, available in a wide array of options to complement any building or architectural style. Our windows are expertly pre-finished using spray-applied microporous paints, allowing you to select from a vast range of colours or choose from over 70 stunning stain combinations.

Read more about Timber Sash Windows.

Sliding Sash Windows Prices

You can buy cheap casement windows from DIY stores such as Wickes and B&Q. That’s probably the cheapest way if that’s the priority. Will they stand the test of time? It’s a gamble; you won’t know the answer until they fail.

The same applies if you buy from the cheaper nationals. If you can negotiate, you may get a good price, but please look at the feedback on Trustpilot before ordering.

The cost of sliding sash windows will depend on several factors. Quality has an effect on the price, both in the materials used and the fixings.

The difficulty for you as the customer is knowing the difference. New double glazed sash windows look the same when they are fitted. It’s only in time that you start to see windows dropping because the hinges aren’t sturdy enough or frames bowing because the aluminium or steel inside the frame is not strong enough.

The fitting can also make a difference. Your windows need to move smoothly, and this relies on level fitting. Unfortunately, the industry is known for sub-contractors who value speed over quality. That’s the reason that, as a premier window supplier, we fully employ our installation engineers. They know that quality takes precedence and will take their time to ensure the perfect installation.

Sometimes, the perception of sliding sash window prices is related to house value. There is no difference in cost whether you live in Cardiff, Swansea, Newport or anywhere else. A window costs the same whether you have a 2-bed bungalow in the South Wales countryside as it does for a 6-bedroom house in the middle of Cardiff.

The difference is that when you pay for quality, you can expect your windows to last much longer. With sliding sash windows, you really do get what you pay for. Our quotes are free as standard and without obligation, so there’s no harm in letting us measure up. Pop your details in the chat below, and we’ll give you a call to arrange to come and measure for you.

Are Everest Windows Really the Best?

We would claim that our double glazing products including our upvc sliding sash windows, are just as good as Everest, especially when taking all of the factors into account. We think our consistent feedback shows that. Everest won the right to use the ‘Fit the Best’ tagline based on one strength test many years ago. Since then, they have been through many changes including closing the company and starting again twice.

We choose our manufacturers for quality, style and value and believe we match Everest for quality. When you call us, you speak to a person and are not left on hold for a long time. Our window installers  are fully employed, which means that we control the quality of everything we install.

Everest sells on the basis of having a lifetime guarantee, but that guarantee is only for condensation between panes and that is an extra cost. The usual guarantees are the same as ours – 10 or 20 years, depending on the product.

With all factors considered, for peace of mind and continuous professional relationship, we believe that Heath Windows and Doors offer a better service than Everest and certainly more value.

Check our reviews and you will see that we are known to be a friendly team with an excellent reputation for quality products and service.

Is Finance Available for Double Glazed Sash Windows?

Our complete range of products is available on finance including double glazed windows and doors and conservatories.

If you are interested in sliding sash window prices, contact us to first to arrange for us to visit, measure up and provide a quotation. There will be no pressure and you will be well-informed to make the right decision.

Before deciding about new windows, consider your budget and all of the available options carefully, as this will help you to settle on a solution that provides maximum enjoyment.

Are uPVC Sash Windows Better than Timber Windows?

The superiority of uPVC sash windows over traditional wooden windows or vice versa depends on various factors, including individual preferences, budget, and specific requirements.

Both types of windows have their own set of advantages and considerations:

uPVC Sash Windows:

Low Maintenance: uPVC windows are relatively low maintenance compared to timber. They do not require regular painting or staining and can be easily cleaned with a damp cloth.

Energy Efficiency: uPVC windows typically offer better thermal insulation, helping to reduce heat loss and potentially lowering energy bills.

Cost-Effective: uPVC sash windows are generally more budget-friendly than timber, making them an attractive option for those on a tighter budget.

Durability: uPVC is known for its longevity and resistance to rot, decay, and insect damage, making uPVC sash windows a durable choice.

Timber Sash Windows:

Aesthetics: Timber sliding sash windows have a natural beauty and warmth that many homeowners find appealing. They can add character and charm to a property.

Environmental Considerations: Timber is a renewable resource, making timber sash windows a more environmentally friendly choice compared to uPVC, which is a plastic material.

Customisation: Timber sliding sash windows can be more easily customised to match the architectural style of a building and can be painted in various colours or stained to showcase the natural grain.

Ultimately, the choice between uPVC sash windows and timber double glazing depends on your priorities, preferences, and budget. If low maintenance, energy efficiency, and cost are essential considerations, uPVC sash windows might be a preferred choice.

On the other hand, if you prioritise appearance, environmental concerns, and the ability to customise the windows to your liking, timber sash windows might be the better option.

It is essential to carefully assess your specific needs and consult with window experts to make an informed decision.

Of course, you may not have a choice if you live in a conservation area. We are happy to explore the options with you and price for both.,

What is the Guarantee on Sliding Sash Windows?

All our products come with a minimum 10-year guarantee. Some ranges have an even longer guarantee. So whichever glazing system you choose, you can enjoy long-lasting peace of mind.

Investing in uPVC, aluminium or timber double glazing with a 10-year guarantee is not just about peace of mind; it’s a testament to the quality and durability of our products at their core.

At Heath Windows and Doors, we stand behind the craftsmanship of our double glazed solutions, and we are committed to providing our customers with windows and doors that will not only enhance the appearance and energy efficiency of their homes but will also withstand the test of time.




Tilt & Turn

Sash Window Installations

Traditional Style Sash Windows

Double glazed sash windows are popular in Cardiff, Swansea and Newport due to a large amount of traditional-style homes. Usually, if a home already has sash timber frames with concrete supports, it makes sense to replace them with modern-style, energy-efficient,  sash uPVC double glazing.

Modern sash double glazing combines the benefits of traditional style with the best in thermal efficiency. We’ll be happy to discuss options with you if you hope to replace your sash windows with a different style, such as casement windows.

  • Serving Cardiff, Newport & Swansea for over 10 Years

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