26 November 2025
Stop Draughts: How Thermally Broken Aluminium Windows Prevent Heat Loss This Winter
With winter’s grasp now firm on the UK, you might start to notice shortcomings of your home’s windows. Cold draughts, rising energy bills and cold, uncomfortable rooms might become the norm in your household – but it shouldn’t be!
If you find your home struggling to keep warm this winter, your glazing could be to blame. Fortunately for you, we have you covered. Endurance Aluminium’s thermally broken aluminium windows are highly effective solutions to help keep your home cosy and comfortable this winter.
What Is InsuLock Technology?
Aluminium has long been hailed for its strength, sleek visual aesthetic, and durability, but it once had a poor reputation for poor conduction. This was until our innovative thermal break technology changed the game.
Introducing InsuLock technology: our high performance polyamide barrier. It sits between the internal and external aluminium profiles of our windows’ frame, to prevent the transfer of cold from the outside to the inside of your home. Essentially, it prevents heat from escaping from your home – especially valuable in the winter months.
Unlike other systems, such as uPVC or older aluminium iterations, our modern aluminium windows offer lower U-values and significantly greater resistance to condensation, alongside improved insulation.

The Benefits of Thermally Broken Aluminium Windows
Reduced draughts and improved heat retention are particularly important with the upgrade of your windows in the harsh UK winters, both for increasing the comfort of your home as you welcome family and friends inside, and reducing the occasions you need to turn on the heating.
They offer much more, too. The strength of our aluminium and the performance of our glass allow for larger glazed areas of your windows and slimmer, more stylish profiles. Our windows look and play the part without compromise; unlike bulkier alternatives you might be looking to replace and upgrade.
The long term value and durability of our aluminium windows cannot be underestimated. After all, it’s no good installing new windows that look good and perform to high standards, if they don’t withstand the test of time.
You’ll be pleased to hear of the impressive durability of aluminium. Resistant to warping, rusting and corrosion, our windows are built to withstand the tough and testing British weather.

Why Choose Endurance Aluminium?
Performance is engineered into the very core of each of our products. Choosing Endurance Aluminium means choosing a system that’s been designed specifically to meet the designs of modern homeowners – combining elegant aesthetics and lasting performance.
If you’re thinking about upgrading your windows, why not take a look through our new brochure? It includes more detailed information on all our products and some of the customisation options that we offer.