Aluminium windows are a great way to continue a contemporary design right the way through to the finishing touches of the project and glazing plays a huge part in defining modern new builds’ elevations so it’s worth prioritising your time when it comes to designing the way you want them to look.

Sleek and versatile, aluminium windows can come in all sorts of colours (yes, companies offer more than just Anthracite), shapes and sizes but it pays to be savvy in your shopping and look out for the best build quality for your money in terms of finish and security.

french aluminium casement window in kitchen

Origin‘s French windows allow customers to enjoy a completely open and uninterrupted view

Benefits of Aluminium Windows

One of the main attractions to aluminium windows is their slim sightlines that won’t break up or look out of place against a large expanse of glazing.

‘Flush’ is the key word when choosing aluminium as the way the opening and fixed glass elements sit against each other side by side will make an impact of the slick look of the finished product.

Uniform sightlines result in stylish, seamless exterior façades and many architects and homeowners want a system in which all units are identical.  

green coloured casement aluminium window

These Origin windows are dual-coloured and paired with a juliette balcony 

Getting Quotes

When it comes to quotes from different suppliers, first of all make sure you’re comparing like for like (locks, handles, any required pressings and so on), and secondly, remember that buying windows is more than just a pricing game: lead-in times can hugely impact your project.

There is likely to be a huge range in quotes and it is important to be aware that a cheap buy with long manufacture and delivery times can delay a schedule and impact other aspects of the build. Don’t forget that, as most systems require specialist fitting, you will need to coordinate with a local approved installation firm if the window company doesn’t offer a fitting service.

aluminium window in modern home

The timber/aluminium range from Internorm are designed with exceptional U values of up to 0.63W/m²K

Quality Checking

Consider the Quality of the Finish

There can be a huge variety in the quality of the aluminium windows themselves. Companies like Origin use prime billets in the manufacture of the windows, rather than cheaper scrap metal.

Good quality aluminium should have a smooth and consistent finish so watch out for pitting from when the profile has been heated during powder coating. A high-quality finish is achieved by polishing the die after each extrusion run to reduce corrosion and avoid contamination on the surface.

aluminium windows in contemporary kitchen

Origin‘s aluminium windows are available in over 50 different colours so your choice matches your style

What to Look for in Build Quality

The way the window is put together can vary a lot from one supplier to the next. For example, when it comes to composite systems – which combine two materials, usually timber on the inside and aluminium externally – ensure that the external and internal frame elements are distinct (rather than, for instance, comprising a wooden frame clad on to an aluminium skin). Also ask where the key elements originated and where they were actually manufactured.

grey aluminium windows in home exterior

Aluminium windows in anthracite and dark grey colours are a favourite among renovators (the Origin 0W-80 window is priced from £330 depending on configuration)

Security Requirements

Most windows and doors manufacturers aim to talk up their products’ security but now, thanks to changes to Part Q of the Building Regulations and the Secured By Design standards, there are measurable ways of ensuring your choice ticks the boxes.

Part Q came into effect on 1 October 2015 and requires accessible windows (basement, ground floor and other easily accessible windows) in new builds to be made to a design that has been shown through testing to meet the security requirements of British Standards Publication PAS 24:2012. Part Q does not apply for projects where initial notice was submitted before 1 October 2015, provided the work is started on site before 1 October 2016.



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