What is the thermal performance of aluminium windows?

Modern aluminium windows are a great option to increase kerb appeal and are particularly popular in contemporary homes throughout the UK.   They have long been the default choice among architects as the windows offer chic, sleek, contemporary lines and attractive slimline frames providing a larger glazing area.

Aluminium windows are nothing new in UK’s homes.  But thankfully, today’s modern aluminium windows have come a very long way since the 1980’s in terms of aesthetics, colour, security and thermal performance. 

Historically, aluminium windows had a reputation for not having very good thermal performance.  But thanks to new technologies the thermal performance of modern aluminium windows has been transformed and offer some exceptional advances in window design and credibility.

In this article, we’ll answer the question what is the performance of aluminium windows? We’ll also look at why the Genesis WarmCore Aluminium Windows has the most exceptional thermal performance on the market today.

But first, let’s look at what we mean when we talk about the thermal performance of aluminium windows.

What do we mean by the thermal performance of aluminium windows – and why does it matter?

Put simply, thermal performance measures how energy efficient your windows are. 

Aluminium windows with good thermal performance will help keep your home warmer in winter because they’ll allow less heat to escape.  On the flip side, aluminium windows with good thermal performance will help to keep the heat out in summer too so your home is more comfortable all year round. 

Thermal performance of all windows, including aluminium windows, is measured in their U-Value. The U-Value is calculated on the rate at which heat transfers through one square metre of a structure. The lower the U-Value is, the better the thermal efficiency is. 

If you are replacing windows in an existing property, the new windows must have a U-Value of 1.6 W/(m2K) or less by law. However, the best aluminium windows will have a U-Value that is less than this and it is important to bear that in mind as it can be a good and useful indication of product quality.

In our opinion, the best aluminium windows on the market are Genesis WarmCore Aluminium Windows. They offer excellent thermal performance because they feature some innovative technological features that offers a step-change in design and performance.

Let’s take a look at them.

What is the thermal performance of Genesis WarmCore Aluminium Windows?

First, the headline. Genesis WarmCore Aluminium Windows are 25% more thermally efficient than traditional aluminium systems. Double glazed Genesis WarmCore Aluminium Windows have a U-Value of 1.3 W/(m2K). and if you opt for triple glazed versions, the U-Value drops to 0.8 W/(m2K).

Why are Genesis WarmCore Aluminium Windows so thermally efficient?

Genesis WarmCore Aluminium Windows have a unique full width thermal core in their frame that ensures the very best in thermal efficiency, with no compromise on design. Unlike many of our competitors we GRAF weld our thermal core too.  What this means is there are no need for cleats, screws or glues that many other aluminium glazing systems use. This GRAF welding process offers total precision and accuracy every time, giving enhanced aesthetics and superb strength to our WarmCore Aluminium products.

They also feature Q-Lon polyurethane foam seals, which helps to keep draughts and wind-driven rain at bay. And rubber-gasketed beads add a secondary weather seal too. This all means our aluminium windows comfortably exceed the requirements of BS6375-1, which sets out the legal standards for weather tightness on windows and doors.

Apart from the outstanding thermal efficiency, Genesis WarmCore Aluminium Windows also offer excellent security for peace of mind and complies with PAS24 security as standard. 

There are two powder-coated colours, grey and white, as standard. These can be used in combination, so if you want the grey aluminium look outside, but a fresher white appearance inside, with Genesis WarmCore Aluminium Windows, you can. And we also offer more colours if you would like to personalise the colour of your aluminium window frames to your exacting needs.

There is no doubt that good quality aluminium windows will enhance the aesthetics of your home and add value to your daily life.   So, to talk to your local Genesis installer about WarmCore Aluminium Windows for your home, click on the ‘Find Local Installers’ button at the top of this page and enter your postcode.