Heath Windows and Doors

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


Award-Winning Family Business Built on Care

Heath Windows and Doors takes pride in providing high-quality double glazing products and services. Our business has been well established in Cardiff for 10 years, during which time we have earned a solid reputation for our double glazing products, including windows, doors and conservatories. A premier double glazing supplier backed up by reviews for your peace of mind.

When you ask us for help, that’s what you will receive. No high-pressure sales tactics or artificially high prices to show false discounts. Our customers want straight-talking combined with great advice. We fully employ our installation specialists to guarantee quality service and a great finish.

Free Quotations

Visit our Cardiff Showroom or Book a Home Visit

Please use any of our contact forms, call, or pop an email through to enquiries@heathwindowsltd.co.uk, and we will book you in as soon as possible.

Open: Monday to Friday 8 am – 4 pm. Saturday 9 am – 1 pm. or call to arrange a home visit. Cardiff – Newport – Monmouthshire

introducing the new ultraframe hup

The #1 double glazing supplier in South Wales. Visit our Cardiff Showroom or Book a Home Visit.



uPVC, Aluminium and Timber

Aluminium, uPVC and timber windows offer many choices of frame styles and colours, so feel free to tear up the rule book and be different.

We supply a wide range of double-glazed windows, including uPVC and aluminium. Your choice of material is usually led by how you want your home to look. If you live on a road of similar houses, you may prefer to look similar to the other houses or stand out as being different. You don’t have to choose the same as you had before. We’ll help you to envision any changes. You may want a completely different configuration to improve airflow. We design for many older-style houses that suit sash windows, while owners of more modern homes usually choose casement windows. Both aluminium and uPVC windows offer many choices of frame styles and colours, so feel free to tear up the rule book and be different. If you want the traditional look of wood, maybe our flush casement windows will suit you. Explore some of our recent window and door installations in South Wales.

uPVC Windows Cardiff – Aluminium Windows Cardiff – Timber Windows Cardiff


Entrance Doors

Stunning Entrance Doors You’ll Love Coming Home to

A door for every home and every budget with a choice of uPVC, composite, GRP and aluminium. Style, strength and security.

Your front door is such a personal choice. You want to feel that it welcomes you every time you walk up your path towards it. There’s a lot of personality in a door. It must be suitable for the house to give instant kerb appeal. The choice is so important that it can affect a prospective buyer’s perception. Your front door is also essential in providing security for you and your family.  Our wide range of doors gives countless possibilities with the combination of colours, glazing and door furniture.

sliding patio doors

Patio Doors

Let the Light in

Transform your home with patio doors in uPVC and aluminium. Bifold, sliding and French doors to change the way you live.

One of the best days of the year is around March, when spring is in the air, and you open up your patio doors to the garden. It just breathes life into your home. Whether you are replacing existing windows, building an extension, or letting more light in by replacing a window with glass doors, we will offer sound advice for the best option.

Patio doors start from a pair of narrow French doors and go right up to a whopping 13-metre width.

Conservatory Roofs

Use Your Conservatory All Year

Is your conservatory too hot in the summer and too cold in the winter? Get all the benefits of a brick-built extension without the upheaval and cost with a thermally efficient roof system.

Replacement roofs are also available in glass and polycarbonate.

Our quotes are free and without obligation so if you are wondering which roof is best for you, we’ll help you explore the options and provide quotes for solid and glazed for you to compare.

solid tile conservatory roof internal view
heath windows and doors showroom

There’s More

A Responsible Company

As a responsible company, Heath Windows and Doors uses every means possible to make your buying journey as smooth as possible. For that reason, we offer affordable double glazing finance packages, are registered with AllChecked, Trusted Traders and Certass and protect your deposit with an insurance-backed guarantee. We also take our responsibility to the community and the environment seriously. Use the links to explore more about our company or give us a call, and we’ll be happy to help.

Contact Us



Bifold Doors


We Know How Important Your Home is

What to Expect

From humble beginnings, we have grown to become the leading independent double glazing supplier based in Cardiff and servicing from Newport to Swansea. We have maintained our family atmosphere and method of working. You will always be able to get through to us on the phone, by text or through social media messaging. We are a people-to-people business. You will find us friendly and open whether you deal with the boss, sales and support staff or installers.

Free Quotations

Our quotes are free and without obligation or pressure. Check our feed back and you will see that our customers often mention that we are a pleasure to deal with. We don’t play any of the games associated with this industry. No falsely inflated prices to show fake discounts. Book a home visit or pop into our Cardiff showroom.

If you have measurements and know exactly what you want, you can email details to us. You may like to use our estimate form to get a broad idea of the cost, but we’re more than happy to visit to measure so that we can provide an accurate quote.

Your purchase is important. It really is worth the effort to visit our Cardiff showroom where you can see the quality of our products and get to know us.

Areas we cover

We supply energy-efficient double and triple glazed windows,  door and conservatory roofs within a reasonable driving distance from our base in Cardiff, including Newport, Rumney, Llandeyrn, St Mellons, Peterstone, Wentlooge, St Brides, Duffryn, Bassaleg, Pontprennau, Penarth, Dinas Powys, Barry, Radyr, St George’s, Drope, Gibbons Down, Wenvoe, Rhiwbina, Whitchurch, Penylan, Cyncoed, Thornhill, Heath, Lisvane, Llandaff, and all of the Vale of Glamorgan & Bridgend, plus all of the valleys. If you are unsure, give us a call, and we’ll advise.

Opening Times

Our Opening Times

Monday: 8am-4pm
Tuesday: 8am-4pm
Wednesday: 8am-4pm
Thursday: 8am-4pm
Friday: 8am-4pm
Saturday: 9am-1pm

Pricing Policy

It can be a problem for genuine businesses to compete with companies who double their prices to advertise 50% discounts. When we don’t offer these discounts, customers can think it means that we are expensive. This is a misconception born out of the discount culture that is prevalent in the home improvement industry. What do you want? A price that starts at £10,000 and is reduced to £5,000 after a couple of hours of haggling or someone who carries a genuine price list and tells you straight away that the price is £5,000?

When you visit our showroom, or we visit you, we will measure, advise and either give you a quote there and then or send it to you. It will be the best price we can give. You won’t have to haggle or wonder whether you should have pushed for more. If you read through our feedback on Google, you will see that this approach is mentioned in the comments.

Quality Control

Fully employed installers mean that we can control the quality. The double-glazing business is inconsistent throughout the year so most companies use self-employed contractors so that they don’t have salary overheads during quiet times. This can lead to unreliable standards. This isn’t good enough for us. We want to control the standards on every installation. For this reason, we fully employ our installers. This also means that our installers can take time out for training because they don’t lose income while they do so. 

Peace of Mind

We’re also Certass approved, and we secure your deposits with QANW Insurance Backed Guaranteed for further peace of mind. Exceptional installers fit our doors and windows with a great deal of expertise backed by continuous training. This is one of the benefits of using a company that fully employs its installers. We insist that they take the time to complete a first-class job, and because they are employed, they can afford to do so. We are Allchecked approved installers with verified reviews and verified by Which Trusted Traders.

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Frequently asked questions about double glazing

What is Double Glazing?

Double glazing is a type of window or door that is specially designed to insulate a building from both heat loss and noise pollution. Double glazing is made up of two panes of glass with a gap between them which is filled with insulating gas, and then sealed with a spacer bar around the edge.

This gas acts as a buffer against heat transfer, preventing heat from escaping during the winter while also blocking heat from entering during the summer. This makes double glazing an effective way to regulate the temperature in a home or building and can lead to a reduction in energy bills. Additionally, the two panes of glass provide an extra layer of sound insulation, making double glazing ideal for those who live on busy roads or in noisy areas.

Find out more about double glazing.

Is it worth replacing old double glazing?

Yes, it is generally worth replacing old double glazing. Old double glazing can have a number of issues, such as leaks, condensation, and reduced energy efficiency, which can result in higher energy bills. Additionally, newer double glazing technologies have improved significantly in recent years, which means that the replacement windows will likely be more energy-efficient and better at insulating your home. This can help you save money on energy bills in the long term, as well as make your home more comfortable to live in.

Savings will depend on the standard of your current glazing. The largest savings come from replacing old single glazing with good qulaity double glazing.

What is the life expectancy of double glazing?

The life expectancy of double glazing can vary depending on the quality of the installation and the materials used. In general, double glazing can last for around 20 years or more if it’s well-maintained and installed correctly.

Factors like exposure to harsh weather conditions, damage, and wear and tear can impact its lifespan. It’s important to properly maintain your double glazing and to have it checked regularly by a professional to ensure its longevity.

It’s not usually the double-glazing units that end the life of windows although they can fail if air gets into them. The frames can warm especially if they are cheap or very old. Mostly windows are changed because the owner wants a fresh new look or a different style.

New uPVC Windows Cardiff – New upVC Windows Swansea – New uPVC Windows Newport

Is double glazing better now than 20 years ago?

Yes, double glazing technology has advanced significantly in recent years, making it more energy-efficient and durable than it was 20 years ago.

Modern double glazing windows feature better-made frames, stronger and more impact-resistant glass, improved sealants, and better insulation. These advancements in technology contribute to better noise reduction, reduced heat loss, and increased security.

Modern double glazing now offers a variety of customisation options such as decorative finishes and color variations. In summary, double glazing today is far superior to what it was 20 years ago.

How do I know if my double glazing needs replacing?

There are several signs that your double glazing may need replacing. Here are a few things to look out for:

  1. Condensation between the glass: If you notice condensation between the panes of your double glazing, it could be a sign that the seal has been compromised and moisture has seeped in. This can reduce the insulating properties of your windows.
  2. Drafts: If you feel a draft coming from your windows even when they are closed, it could be a sign that the seals around the window frames have deteriorated.
  3. Difficulty opening and closing: If you have to struggle to open or close your windows, it could be a sign that the frames have warped over time.
  4. Damage: If your double glazing has any visible damage such as cracks or chips, it may need to be replaced.

If you notice any of these signs, it may be worth getting your double glazing inspected by a professional to determine whether replacement is necessary.

Our quotes are free and without obligation so don’tbe concerned about calling us out to advise.

What is the best time of year to buy double glazing?

While there isn’t necessarily a specific “best time” to buy double glazing, there are a few factors to consider depending on who you buy from.

Firstly, many companies tend to have (so-called) sales or promotions during the slower months of the year when there isn’t as much demand. This can include the winter months, as people are less likely to be thinking about home improvements during this time. Thes discounts are available all year but disguised as different offers so in reality, there is no difference.

You’ll find that we do not play games with prices. Our prices are fair and real. We do not inflate prices to give false discounts. 

If you  have your double glazing installed during the summer, it can help to reduce the disruption to your daily routine. You may also benefit from improved energy efficiency during the warmer months, as double glazing can help to keep your home cooler by reducing heat gain through your windows.

Ultimately, the best time to buy double glazing will depend on your individual circumstances and priorities. 

Serving Cardiff, Newport & Swansea for over 10 Years

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