Aluminium Doors Amersham

Casement Doors

Aluminium Casement Doors for New Build Developments

Bespoke Products

Our aluminium casement doors will be supplied for your new build development to order. That way, they are made to measure and bespoke to your exact specification. Nothing is off the shelf! You can create the perfect single or double casement doors for your new build development project.

Full Design Service

We can cater to architectural requests, including the need for full CAD drawings. If you’re choosing our services for full scale window and door fittings, we can offer a comprehensive visualisation of what the project would look like. This is all included with your service here at OpenSquare.

Expert Installation

You can place your complete trust on our standard of installation. We are seasoned experts in our field, completing effortless fittings of casement doors to new build properties. Knowing the fitting process like the back of our hand, we can place heavier emphasis on delivering a superb customer service.

Aluminium Sliding Doors Amersham

Casement Door Prices Buckinghamshire & London

We have an online quoting engine you can use to request a quote for aluminium casement doors or French doors. You can use this to request a price specific to your project on any device. The process can be repeated over and over as many times as you like.

Aluminium Door Prices Amersham

Smart French Casement Doors

We work directly with Smart to supply their Alitherm Heritage French door system. These casement doors help to connect indoor and outdoor spaces, while slim sightlines create a warm and welcoming environment. They are a great addition to your new build development, wherever it may be in the home counties, London, or more local to us in Buckinghamshire.

The French casement doors that we can install adhere to PAS 24:2016 standards. Your end users will be getting secure external doors in their property. They additionally offer outstanding thermal efficiency and complete customisation. You can unify the designs of your casement French doors to that of your windows, as we use the same supplier.

Aluminium Door Quotes Amersham

AluK Slimline Casement Doors

For the absolute best in aesthetics, consider our slimline casement doors. We get these from AluK, who are leaders in aluminium extrusion. Despite featuring incredibly slim sightlines, these casement doors are still incredibly robust and durable. In fact, they can be certified to both PAS 24 and Secured by Design. End users in the new build property can have peace of mind.

All the while, the slimline aluminium profile allows natural light to flood into the home. This can make the attached room feel much bigger than it actually be. As a lightweight product, end users will also appreciate how easy it is to open and close their new casement door. All the while, the durable, weatherproof composition ensures decades of use.

Technical Specifications



U-Value (W/m²K) (Double Glazing)

Up to 1.4

U-Value (W/m²K) (Triple Glazing)

Up to 1.0

Energy Rating

Up to 'B'


PAS 24 & Secured by Design available

Start Your Quote Today

Use the online quoting engine on our website to request a casement door price on any device. We can use your submission to kickstart your project, contacting you to determine the specifics of the new build development. If you have any questions about our casement doors, our French doors, or any of our other products or services, you can contact our Buckinghamshire team for free today.


Find the answers to a selection of frequently asked questions here. If you still have something you need the answer to, get in touch with our team in Buckinghamshire today.

Where can casement doors be installed?

Casement doors are a versatile addition to your new build project. As single or as double doors, they can connect indoor and outdoor spaces. Use them to open a property up into a garden, or to connect the house to any extension or conservatory that is being fitted as part of the project. They can also be installed to porches as well. The options are limitless.

What is the process of working with OpenSquare Glazing?

We first ask you to submit an enquiry, either through the form of an online quote request or via our contact form. From there, we can specify your project in full, understanding the requirement of the new build development.

Designs of how the casement doors and other products would look on the home are then produced, before the systems are supplied. Finally, we organise the installation at a time that works for the development.

Where are OpenSquare Glazing based?

We operate from state of the art facilities in Chalfont St Giles. As a result, we complete a lot of work locally in Amersham, Beaconsfield and the county of Buckinghamshire. However, we also undertake many projects across the other home counties and London.

If you would like confirmation that we can accommodate your project, get in touch with us today.

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