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Casement Windows

Welcome to John Fredericks
The Ultimate Collection - John Fredericks


Casement Windows are still the most popular window of choice for homeowners in the UK, combining a classic design with a durable frame material that is renowned for its strength, thermal efficiency, and low maintenance requirements.

Casement refers to a style of window where the sash is attached to the frame by one or more hinges, allowing the window to open outward, providing excellent ventilation and easy access for cleaning.

With a wide choice of customisation options, including different frame styles, finishes, colours, and handles, PVCu casement windows are suitable for a huge variety of properties, making them a popular choice for both residential and commercial applications. 


The first decision your customers will need to make is what kind of window profile they require – bevelled or ovolo. This choice is often influenced by the style of the property or simply by individual preference.


Bevelled profile, also known as chamfered, provides a sharper appearance, with the frame meeting the glass with an angled straight edge.


Ovolo, or sculptured profile, is a popular choice for windows in period style homes. It creates a curved shape, recessed frames and softer sightlines.


Whatever style and finish you require for your casement windows, the Ultimate Collection offers a huge choice to satisfy the requirements of even the most discerning customer. Please note that colour swatches provided are for illustrative purposes only. Not all colours depicted are available in every profile type or product range. For more information regarding colour availability, please refer to our colour guide.



When it comes to choosing handles, there is a wide range of styles and colours for your customers to pick from.

Georgian Bars

Many of your customers may decide to have decorative Georgian Bars applied to their windows for a truly authentic Georgian style.

The unique astragal clip on Georgian Bar from John Fredericks is a scribed PVCu bar, finished and colour matched to the exact same finish of the chosen windows.

The bars are connected to full length aluminium fixing strips that are bonded to the glass unit. This, combined with the spacer bar grid design inside the unit, gives the impression that each pane is a separate unit.

The innovative system ensures the Georgian grille does not shrink, warp or detach, regardless of weather conditions.

In contrast to the astragal clip on Georgian Bar system, where the bar is applied onto the outer faces of the insulated glass unit, as the name suggests, Internal Georgian Bars are held within the sealed glass unit.

Internal Georgian Bars still provide an effective feature, but with the bars inside the glass, the glass maintains a flat surface with no protrusions and are therefore easier to clean.



In order to meet the government’s thermal performance targets and current Building Regulations, all replacement PVCu windows are required to achieve a U-value not exceeding 1.4 W/m²K or Window Energy Rating ‘B’ or better.

Ultimate Collection windows can achieve an A+ Energy Rating with an Energy Index of 10 and a U-value of 1.4 W/m²K.



The Ultimate window has been refined and designed to protect the homes of your customers and provide them with total reassurance and peace of mind.

The locking technology at the heart of every casement window incorporates 10 security points in all four directions.

Bevelled window with concealed vents


You can also offer your customers the option of concealed ventilation.

The ventilation is built into the head of the outer frame which is concealed by a full width aluminium exterior canopy, colour and finish matched to the window frames. The same interior link vents with closure plates are used on the inside of the window.

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