Blending the old with the new

Ideal for home improvement projects which require sympathetic installation such as listed buildings and conservation areas, the Alitherm heritage range allows for no compromise when it comes to aesthetics. The range has been approved for use by many local authorities including London boroughs and CADW – the Welsh government’s historic environment service.

Using innovative polyamide thermal break technology, a barrier is created between the warm air inside and the cold air outside. This ensures that the windows and doors achieve high U values with no draughts. Utilising the exceptional strength of aluminium, these windows and doors are expertly made to the highest standard. The strength of aluminium allows it to hold more glass with slimmer sightlines to bring more light in.

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A resilient yet attractive range for residential and commercial properties

Highly durable, they are tested to ensure they can withstand the harshest of storms and whatever the British weather throws at them. With no rusting, fading or deterioration, they are perfect for use even in harsh coastal areas.

Security is a priority when it comes to our products and the Alitherm Heritage range is no exception. All of our windows and doors come with multipoint locking mechanisms for peace of mind.

One of the key selling points of aluminium as a material for windows and doors is that it requires little to no maintenance. Just a simple wipe down is all that’s needed to keep it looking as good as new. Our powder coated finishes offer a wide array of colours including metallic and heritage options and heritage hardware is also available to maintain a traditional style. Slim sightlines ensure the windows and doors allow more light in and give a sophisticated appearance.

Aluminium is recyclable so at the end of its use it can be reused - a plus point for the environment and the carbon footprint of your project.

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The right choice for every home and business

Our alitherm heritage windows come in the following configurations:

  • Fixed pane
  • Sash
  • Top-hung casement
  • Side-hung casement
  • Pivot
  • Tilt and turn

When it comes to doors, they can be used for both single and double door applications as well as external and internal doors – the perfect choice for a secure and attractive home.

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Fensa GGF SME national silver winner Schueco partner


Jason Quince

Just had all my windows and french doors done. Clean and reliable. Great price. Would thoroughly recommend.

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Maria Lapish

Brilliant work, efficient, friendly clean working and they did an amazing job, I am so pleased with my final work. I cannot recommend them more highly. And they do not charge ridiculously high prices. Thank you Kevin and your team.

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Holly Barlow

We had our windows and front door completed by Bedford Bi-Folds. Allan came out originally to quote, he was very informative advising us of all options. We were kept up to date with when the install would take place. The install team were brilliant, friendly, efficient and left everywhere tidy. The windows and door look amazing, we are so pleased, thank you for such a brilliant service and end result. Would definitely recommend.

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Rosa Speller

A fabulous Rock door supplied and fitted by Bedford Bi-Fold, fitters being Alex and Archie did a first class job. We have had many compliments, and the door has excellent security features. We would highly recommend the door and Bedford Bi-Folds

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Nathan Hulatt

Thanks to all at Bedford Bi-Folds for a professional and pleasurable experience from start to finish with the installation of our Bi-Folds and window. Kev and Archire above and beyond expectations coming at 5pm to fit these. Will be using them again when our on going project picks up pace, would highly recommend using Bedford Bi- Folds if anyone is looking for doors, windows etc etc, Kev listened to what we wanted and produced exactly that.

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