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Deceuninck’s flush casement window boasts stunning aesthetics that transform both old and new properties, from modern townhouses to country cottages.

Perfectly combining efficiency with comfortable and affordable living, our flush windows not only reduce noise pollution, but are also in keeping with period properties, meaning as an installer, you can offer a unique product that meets the requirements of most conservation authorities.

  • Sleek slimline frames
  • U-value of between 4–1.2 W/m²K
  • Superior sound insultation
  • High energy rating and weather performance


Formed in 1982, Central Window Systems is today one of the Midlands’ largest fabricators of PVCu and aluminium products.

Our wide range includes Deceuninck PVCu windows and doors, and aluminium windows, bi-folds, sliding doors and roof light systems from AluK.

We pride ourselves on delivering quality products matched with reliable service and outstanding customer care, and with a wealth of experience and knowledge, we’re a stable company who will support you in the years to come.

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Flush casement window prices
  • Specification
  • Performance
  • Product Options
  • QR Code System


  • Sleek slimline frames
  • Unique night vent facility
  • High energy rating and weather performance
  • PAS24 approved
  • Galvanised steel profiles optimised for strength and rigidity
  • Mechanically joined transoms and mullions
Flush casement window fabricators


  • Can achieve U-values of between 1.4–1.2 W/m²K
  • 600 Pa air permeability, 300 Pa water tightness, and 2000 Pa wind resistance
  • Superior sound insulation
  • Optional thermal chamber insulator for enhanced thermal performance
Flush casement window accessories

Product Options

  • Top hung and side hung options
  • Double or triple glazing available
  • Glazing options from 5mm up to 42mm thickness
  • Dummy peg stay option
  • Traditional butt or mitred joint options
  • Georgian bar option
Flush casement window installers

QR Code System

Our new QR code system offers a fast and easy way to find information about all of our PVCu windows and doors. It’s easy to use, and it lets our central installers find technical specifications and guides all on their smartphone!

  • Useful “How-To” Videos
  • BFRC Energy Rating Information
  • Product Simulations
  • Hardware & Glass Size Specifications

Become an installer, and find out more about our QR code system.

Colour Range

Why Choose Central Window Systems?

Experience Matters

With a wealth of experience and knowledge, we are a stable company who will be here to support you in the years to come.

Highest Quality

Exceptional product quality is a prerequisite at Central Window Systems. We offer the most advanced window and doors available on the market.

Professional Standards

Delivering products to you on-time, in full and in pristine condition ensuring your professional installation is completed with the support you expect from your supplier.

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Access a full range of marketing, sales & support on-the-go.

For the busy glazing installer, our marketing support service is completely accessible via your Smart Phone. As a Central Window Systems partner, you get instant access to our full suite of technical information and promotional material.

  • Showroom Materials & support
  • Brochures, Downloads & Images
  • Latest News & Notification System
  • Plus much more
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