PVC Vertical Sliding Windows with Tilt Option

Typically, sliding sash windows comprise two sliding sashes that move up and down within their frame, supported either by weights or by modern spring balances. They have evolved over the centuries and the windows we are replacing today are very elaborate, in-keeping with Victorian tastes, with deep bottom rails, decorative horns and contoured glazing bars. Visit the gallery of images

KAT's PVC Vertical Sliding Windows

PVC Sliding Sash Windows

Thermally efficient Vertical Sliding Windows

KAT manufactures Sliding Sash Windows, also referred to as Vertical Sliding Windows or Box Sash Windows, which replicate the style and appearance of a traditional timber sash but with all the benefits of modern uPVC. The Windows feature thermally efficient double glazed units and weather proof gaskets which will ensure you stay warm, dry and draught free all year round.  Contact KAT for more information

Box Sash Window

Vertical Sliding Window

Cleaning the outside of your windows

KAT’s Box Sash Windows feature an easy clean system that allows the outside of your window sashes to be cleaned from the inside of your home, thanks to the tilt facility.


Cleaning outside windows

Operating the tilt facility

Bespoke window furniture in a choice of finishes

KAT has designed bespoke window furniture, including cam catches to lock the windows, sash lifts to hold onto whilst sliding the bottom sash upwards, ring pulls to slide the top sash downwards and an opening restrictor so that the window cannot be opened beyond a certain point. Visit the gallery of images to see the different finishes available. View the finishes available

Box Sash window furniture

Sash lift in Pewter finish

What sizes are Box Sash Windows available in?

KAT manufacture each window to your bespoke sizes, to suit your individual project.  You can choose to have authentic Georgian bars on one sash or both sashes, to suit your property.  VS windows can be made up to 3 metres high.  More technical information can be found here. 

PVC VS furniture

Chrome cam catch

What colours are available?

KAT manufacture PVC Vertical Sliding Sash windows in a wide range of RAL colours, to complement or contrast with the existing doors and windows in your home.  Contact KAT’s Customer Services Team for more information.


Colour wheel

Choose from a wide range of RAL colours

What is the correct way to operate the Tilt Option facility?

KAT can supply you with full operating instructions on request.  It is important to ensure that the bottom sash has been opened slightly before attempting to tilt the window, then the top sash can be opened slightly and tilted. These images will demonstrate.


KAT manufacture Vertical Sliding Windows, Casement Windows, Bifold Doors, Patio Doors, Entrance Doors, Lantern Roofs and Flat Roof Lights in a wide range of sizes and colour finishes. Contact KAT on 01625 439666 or email [email protected] for more information.