Flush Casement Windows

The simple lines are ideal for older, heritage properties, but these windows also cut a dash with more contemporary and minimalist architectural styles. The design classic with its outwards opening panes will never go out of style. From a simple arrangement with a single opener to a beautiful bay, flush casement windows suit so many homes and building types. And here's the real beauty, Optima casements are adaptable. You choose the layout to suit your home: the size and position of the opening lights, the location of handles and all the finishing touches.

Modern windows, with traditional features We'll admit that we've copied the appearance of the original, timber flush casements, but the thermal performance and weather protection of our PVC-U frames is up to 21st Century standards. There's a simple chamfered shape to the exterior and your choice of shape for the interior to suit your home's decor and your personal style.The Optima Flush Casement suite includes all the extras required to recreate period details, and because every component has been purpose made, the proportions are a perfect match. We've selected period colours and sourced matching hardware including dummy peg stays and monkey-tail handles.We've created a beautiful blend of traditional appearance and impressive performance that make the windows very easy to live while remaining attractive.

Flush Casement Windows


'A' Rated as standard

All our Flush Casent windows are 'A' rated as standard, meaning a more energy efficient home that will help reduce the costs of your energy bills.

Internally Glazed

All our Casement windows come glazed with highly energy efficient double glazed units. Our standard Glass units are 24mm thick and are filled with an insulating argon gas. 

High Security

With security being one of our main priorities, we only install high security locking mechanisms from brands such as Yale and Winkhaus to give you total peace of mind and to keep you secure.

High Performance

As well as an attractive period look and immaculate quality, our Optima Flush Casement windows include features that set it apart from the competition, a superb weather protection, insulation, durability and security. Optima Flush casements can be made in almost any layout, from a tiny, single opening pane to a grand bay window. We can keep the styling simple or add decorative bars and feature glazing. We can even make shaped windows or charming French style casements with symmetrical opening panes.

Professionally Fitted

We know choosing the right Company can be a daunting and difficult task. With so many different Companies to chose from and so many options available how can you decide? and how do you know the job will be completed to a high standard with a good quality window?. the honest answer is, you don't! We often find that our customers rely heavily on information that we provide. We will always be as honest and open about the products we install and will always use highly skilled and qualified installers to carry out the installations. All our fitting teams have been trained to an extremely high standard and are regularly kept up to date with any new regulations in place.  We pride ourselves on the quality of the product and installation and over the years have gained an excellent reputation with existing and new customers who regularly return to us for more work.

Guaranteed to last

Every job completed in a domestic property will come with a full 10-Year warranty and a Fensa certificate which is backed by Home-Pro insurance, so no need to worry that your warranty is only as good as the paper it is written on. You will have a full comprehensive warranty that will cover all aspects of both the window and its installation.

Download Our Brochure

Flush Casment Windows (pdf)


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Covenant Windows

Unit 4, Mountain View, Rhosddu Industrial Estate, Wrexham, Wrexham LL11 4YL, GB

01978 266598



09:00 – 17:00


09:00 – 17:00


09:00 – 17:00


09:00 – 17:00


09:00 – 17:00