Genesis Vertical Sliding Sash Windows


Genesis VS recreates the beauty of traditional timber sash vertical sliding windows like no other. It sets a new standard by coupling authentic style and elegance with modern security, energy efficiency and low maintenance design. Our sliding sash windows come second to none.


Genesis Vertical Sliding Windows are A rated as standard. Like all windows and doors in the Genesis Collection, it offers effective thermal insulation – keeping you cool in the summer and warm in the winter. That in turn lowers your energy use, helping you save on your bills while protecting the environment and reducing carbon emissions.


Genesis vertical slider window offers great security and peace of mind as standard. But in certain circumstances a little extra is required, and with Genesis VS there’s the option to upgrade to PAS 24 enhanced security standard. Features such as laminated security glass and high security locks protect the window from sustained attack for a minimum of thirty minutes. Our sliding sash windows combine security and style like no other.


Sash windows are a longstanding feature of British architecture and have been since the 18th century. However, traditionally there’s been no such thing as an authentic modern equivalent. Until now.

Genesis Vertical slider windows are authentic to the very last detail, and are widely specified as the real alternative to timber, so much so that they’re accepted for use in conservation areas across the UK.

Why Sash Windows?

Sash windows are a longstanding feature of British property architecture and have been since the 18th century. This is why we have worked tirelessly in creating a sash window that is a near to the original timber versions as possible and provides a credible alternative.

A sash window is manufactured with two sliding sections, or sashes, which slide up and down and can tilt inwards for convenient cleaning access. Genesis sash windows are authentic in virtually every detail and are widely regarded as one of the best alternatives to timber in the market today.

This is why our beautiful sash windows are perfectly suited to a range of period properties, particularly for those older houses that are being renovated, such as Georgian, Edwardian and Victorian. Because the Genesis Windows are so aesthetically pleasing and look so authentic, they are the perfect solution when it comes to renovating the previously mentioned period properties.

Some other names for this type of window:

  • Vertical sliding sash windows
  • Sash and Case windows
  • Box sash windows

Here at Genesis, we love to work closely with our customers to ensure that their windows are exactly right down to the finest detail. All of our sash windows are available with deep bottom rails decorative sash horns and astragal bar detail, all in keeping with the style of period properties. Being respectful to the traditions of the property style we ensure that these windows are the perfect match for your home.

With Genesis you have a sash window that will add that touch of period charm that is created in harmony with the style of your property and always look and perform well in any weather.

Our sash windows come with a range of glazing and security options to ensure that they are as energy efficient as possible, whilst also being extremely safe and secure. In addition to as customisable security and glazing sash windows from Genesis Collection can be customised to any colour you wish.

We have a wide choice of bespoke RAL colours including woodgrain and smooth finishes to natural coloured wood. With Genesis the choice is yours from British Standard colours to RAL colours in addition to which we have a colour matching service which enables us to replicate any of your favourite colours if you can provide us with a small sample swatch or offcut to work with. This will ensure that your new sash windows are manufactured in the exact colour that you would like them.

At Genesis we are set up to design and create sash windows that look and perform exactly to your specifications taking into account colour, size, features, hardware, security and energy efficiency.
Genesis VS is an A rated window as standard. Like all windows and doors in the Genesis Collection, it offers effective a range of thermal insulation glazing properties which can keep you cool in summer and warm in winter. As well as these fantastic insulation features, all of our windows are available with the following features:

  • A choice of toughened glass, obscure glass, laminated glass, acoustic glass and glass for different thermal properties
  • PAS24 Security compliance available on most window configurations
  • A rated Glass for energy efficiency
  • Mechanical joints and seamless Graf weld joints
Mechanical Joints
Graf Weld Joint
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