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French Casement Windows

  • Securely located beads
  • Strategic wall thickening
  • Impact resistant materials
  • A++ Energy Rating

Unique and Adaptable

This is an exceptional range with the highest possible standards, but every window remains a one-off, made to your order, and with Optima there are options to suit everyone.

UPVC Windows Explained

Featuring the same classic styling, our casements are designed so that they don't require a central mullion (upright). Opened, it means views are uninterrupted. with no fixed mullion, you can be confident our windows comply with the fire regulations for escape.

Casement Window Options

With Optima’s wide range of finishes, whatever you want, you can have it. Bold colours, subtle tones, natural wood effects, flat and grained finishes. If you like the idea of a dark frame outside but worry things may feel gloomy indoors, choose a dual-coloured option. If you like the look of painted wood, choose a textured, solid colour – you get the shade you want and the grain of wood without all the effort – a move that’s really effective in white or cream.





Agate Grey

Pebble Grey


Chartwell Green

Dark Green

Steel Blue

Dark Red

Hazy Grey Finesse

Kensington Grey

Buckingham Grey

Basalt Grey Smooth

Slate Grey Finesse

Slate Grey

Anthracite Grey Smooth

Anthracite Grey

Black Ulti-Matt

Black Brown


Irish Oak

Honey Oak Super Matt

Light Oak


Swamp Oak

Silver D Smooth


Flemish Gold Smooth

Download a Casement Window Guide

View more benefits, styles, colours and much more.


Casement Window Benefits


Designed for longevity and durability in beautiful finishes to perfectly complement your windows and doors.

Knockers and Numerals

Your beautiful home should include all the period features and decorative touches that make it special.

Purpose-made accessories

The system has a complete range of accessories, including cills, arched heads, night vents, glazing bars, sash horns and weather bars.


Every component of our windows and doors works together for a perfect finish.


Strong and stylish in the same wide range of colours and finishes.

Your Next Steps

Why choose us
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Got a question? Call us on 0116 403 0279

You can also email our team of experts on enquiries@customtradesystems.co.uk

Copyright 2024 Custom Trade Systems Ltd, All Rights Reserved. Registered in England & Wales No. 13185588 | VAT No. GB 437148488
Custom Trade Systems Ltd is an Introducer Appointed Representative (Financial Services Register No. 980326) of Phoenix Financial Consultants Limited (Phoenix). Phoenix is a credit broker, not a lender. Phoenix is authorised and regulated by the Financial Conduct Authority (FRN: 539195), and offers finance from its panel of lenders. All finance subject to status and credit checks.

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