Double Glazing Suppliers Serving Cardiff and South Wales

 Award-Winning Family Business Built on Care.

Heath Windows and Doors Cardiff 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. 

Visit our Cardiff Showroom.

Monday to Friday 8 am - 4 pm. Saturday 9 am - 1 pm.


What Can We Help You With Today?

Start By Choosing a Product.


What to Expect From Heath Windows and Doors.

From humble beginnings, we have grown to become the leading independent double glazing supplier based in Cardiff and South Wales. We have maintained our family atmosphere and method of working. You will always be able to get through to us on the phone, 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. Our quotes for doors and any double glazing solutions are free and without obligation. 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 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 showroom where you can see the quality of our products and get to know us.

Our friendliness is reflected in our reviews. You can see more of our reviews by visiting the Heath Windows Reviews page.

For Your Peace of Mind.

We're also Certass approved, and we secure your deposits with 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.

Who Are We?

Miall Hardwick runs heath Windows and Doors Ltd with a team of long-serving dedicated staff. At some point, you will meet Miall as he is involved in every aspect of the day-to-day running of the business. Miall has been in the windows and doors business for most of his working life, so he knows a thing or two. All of the team are passionate about the business and dedicated to giving you the best possible service.

Heath Windows and Doors Cardif Showroom of the yearOur showroom is based in Portmanmoor Road in Cardiff with easy parking. We've worked hard to equip our showroom with a wide range of full-size samples to help you make the right decision for your home. 

We've often been told that we have the best showroom in Wales and we were proud to win Showroom of the Year by the Fenestration Awards. You will find uPVC and aluminium windows, patio doors including bi-fold doors, french doors and sliding doors, plus a variety of front doors. We recently installed a tiled conservatory roof sample so that you can see the quality of our replacement conservatory roofs. 

We appreciate that you have a lot of choices regarding selecting a supplier for your home improvements, so we have done our best to showcase the quality of our products. We look forward to welcoming you.

Our Ambassadors.

Colin Jackson opens heath windows and doors showroom in CardiffWhen you choose Heath Windows and Doors, you're in good company. We've been proud to supply windows and doors for some names you may recognise, such as Colin Jackson, Polly James and Ken Doherty. We had the pleasure to welcome Welsh sprint and hurdling legend Colin Jackson CBE. The former World champion & Olympic silver medalist visited the team at Heath Windows to officially open our new showroom. Our showroom exhibits our range of windows and doors where anyone can come and take a closer look at the products that Heath Windows offers.

Opening Times.

Our Summer opening times are from 8 am - 4 pm Monday to Friday, and 9 am - 1 pm on Saturdays. You are welcome to call us before leaving. 02920 650 854.


Our Cardiff showroom is now open. During lockdown, we continued to provide quotes, surveys and installations. Many of our customers with quotes have been waiting for the showroom to open, so we are busy. While we will try to accommodate anyone who visits without an appointment, we strongly advise booking so that we can give you our best attention. We request that you wear masks and use the sanitiser provided at the entrance.


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. In Cardiff, we have 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 in frames 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 installations. Cardiff Windows and Doors.


We supply all types of doors. Front doors, back doors and patio doors in a variety of materials. GRP and composite doors or for the ultimate in luxury front doors, consider our aluminium doors from Origin or Spitfire.  Whether you want to create a welcoming entrance, open up to the garden or a practical stable door, at Heath Windows and Doors, we will have a solution for you.

Front Doors.

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 right for the house so that it gives instant kerb appeal. The choice is so important that it can affect the perception of a prospective buyer. Your front door is also important in providing security for you and your family. There's a wide variety of materials to choose from, including composite, aluminium, GRP and uPVC. Between them, they have countless possibilities with the combination of colours, glazing and door furniture.

Patio Doors.

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, building an extension, or letting more light in by replacing a window with glass doors, we will offer sound advice for the best option.


Create More Living Space.

If you have an old conservatory that is not serving you well, consider replacing the roof with a solid tiled conservatory roof. The complete roof and ring beam is removed to replace it with a lightweight insulated tiled roof. This will give you the benefits of an extension with an uninterrupted view that you expect from a conservatory. With more people working from home, houses feel smaller and properly utilising the conservatory may give you that extra space you need without the massive cost of an extension. A new roof makes the existing conservatory feel brand new, but if you want to replace the whole conservatory using the existing base, we can quote for that too.

There's More.

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 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 below to explore more about our company or give us a call, and we'll be happy to help.

Areas we cover.

We supply energy-efficient double glazing, 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 and South East Wales. If you are unsure, give us a call, and we'll advise.