Aluminium Windows

The Benefits

Bespoke Products

We work directly with our trusted suppliers to offer bespoke aluminium windows to our clients. Customisation can include the colour, hardware and the overall configuration. Whatever the design vision for your new build development, our bespoke aluminium windows are perfect.

Full Design Service

Our team can produce full CAD drawings for your new build project, wherever it is across London and the south. You can see your development come to life with our aluminium windows. Our process is comprehensive, taking the hassle away at your end and instilling peace of mind.

Expert Installation

We use our own team of fitters to complete efficient installations of your aluminium windows. Many of our team have worked in the double glazing industry for decades, making window installations second nature. We take a duty of care with every development project we work on.

Aluminium Window Cost Marlow

Aluminium Window & London

Request a quote for a set of aluminium windows today. We have an online quoting engine you can use to request pricing for the aluminium window design you’re after. You can also contact our team if you have any enquiries about our prices or our services

OpenSquare steel look Heritage Aluminium Windows

The OpenSquare steel look Heritage window range lead in both design and performance. Available as both casement and as tilt and turn profiles, they offer slim sightlines with a framework that can accommodate both double and triple glazing. This allows these aluminium windows to provide a great energy performance for your new build’s end users.

With casement or fixed casement profiles, these aluminium windows can be tested to PAS 24:2016 security standards. With multi point locking systems as standard, these aluminium windows deliver the right standard of durability and home protection your new builds deserve. They are also fully weatherproof, adhering to various Kitemark certifications.

OpenSquare Slimline Aluminium Windows

We are also proud to stock and install our range of slimline casement aluminium windows. Like the heritage windows, they deliver a blend of style and substance, making them a versatile option for any new build development. They achieve a Window Energy Rating of ‘B’, making them a thermally efficient addition to any new homes or apartments.

They come with PAS 24:2016 certification, and can additionally be tested to Secured by Design. This makes them one of the most durable aluminium windows on the market. All the while, ultra slim sightlines allow the maximum amount of light transfer. As a client of ours in London or the home counties, you can specify the exact colour of your OS aluminium windows as well.

OpenSquare Flush casement window

OpenSquare Flush Aluminium casement window


Designed with minimal sightlines and exceptional weather performance, this ultra-minimal flush window has a slimline sash of just 45mm.

With a wide variety of glazing options, configurations and frame finishes available, the system can be designed completely bespoke for each project to ensure it meets specific design requirements.

PVCu Rio OpenSquare flush window

OpenSquare - Vogue Range PVCu flush casement window

OS Vogue Range – Designed for perfection.

Created to offer competitive advantages to all build and projects, our flush fit PVCu windows provide a solution that challenges traditional options.

The ‘A’ Energy rated Rio flush fit features clean lines and a true finish in order to ensure minimalist impact on the property’s exterior. Available in both chamfered and sculptured frame options, our flush system can suit any installation.

Technical Specifications



U-Value (W/m²K) (Double glazing)

Up to 1.4

U-Value (W/m²K) (Triple glazing)

Up to 1.0


KM 81543 & KM 81580 available


PAS 24 & Secured by Design available

Start Your Quote Today

Use our quoting engine here to request a price for the aluminium windows we can install. We work with new build developers, as well as architects, contactors and other specifiers.


Find the answer to a few selected FAQs here. If you have anything else to ask about our aluminium windows or our service, speak to our team in London.

Are aluminium windows thermally efficient?

They are! Our aluminium windows can come with a polyamide thermal break, ensuring they deliver an outstanding thermal performance.. The end users can enjoy outstanding, long term energy efficient in their new build. They can enjoy lower carbon footprints.

Are aluminium windows better than uPVC?

We certainly believe so. Aluminium offers sleeker, high end aesthetics, without compromising on performance. The slimmer sightlines allow more natural light into the room, which is excellent for making your new build properties feel brighter, warmer and more spacious. As a lightweight material, aluminium is also incredibly easy for us to install.

What area do OpenSquare Glazing cover?

We are based in NW London, and cover a vast area.

If you believe you’re in our coverage area but would like confirmation, simply get in touch. If you are, we can begin our discussions regarding your new build development and our aluminium windows.

Get in Touch


Contact Us!

Privacy Policy | Cookie Policy | © 2024 OpenSquare Glazing 2021

Start Your Design

Call Us

Contact Us