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Vertical sliding box sash windows offer slim sight lines, a large glass area, a wide range of design options and flexible solutions for period properties or new build. This window style originated in the 17th century and continues to offer elegant glazed opening solutions with optimum ventilation and practicality guaranteed.
The KAT Classic is modern, secure, virtually maintenance free and manufactured from high impact, durable uPVC. uPVC box sash windows authentically replicate the look of timber but are virtually maintenance free. They are hand crafted to your dimensions, using very similar skills and techniques to those employed in a joinery workshop.
The thermal properties of uPVC are excellent and these windows can be supplied in a wide range of finishes. From six feet away it is extremely difficult to tell if the window is timber or uPVC.
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KAT only supply bespoke windows to your exact specification. Each window is carefully designed and engineered to either replicate the authentic period features of an original design or to produce a contemporary window with a modern twist.
You choose the style, frame shape, hardware colour, glazing and other special features including authentic Georgian Bars to suit your property. We also offer ‘the solution’ for sensitive period buildings and for properties in conservation areas’. Our market leading box sash windows come with an extended 10 year warranty and design and engineered testing has demonstrated they have a life expectancy in excess of 25 years.
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All uPVC sections are extruded from high impact durable uPVC in accordance with BS7413. We have a wide range of timber alternative grained finishes and we can paint with almost any RAL colour.
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All KAT box sash hardware is made in the UK. There are a number of options to choose from sash lifts, locking cam catches, safety restrictors and D handles.
Please consider your choice of ancillary hardware carefully because that is what you will eventually notice most when your products are installed. Choose from one of our suited finishes on our ring pulls and catches because it is attention to detail that helps make this unique product range so exciting.
Heritage Catches available in: –
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Our box sash windows are designed to discourage a determined intruder, and can be manufactured to meet Secure by Design or PAS 24:2016 standards.
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A little time and care with your choice of colour is advised and your selection should be influenced by the style of your property, surrounding architecture or your others windows and doors.
Colour options: –
Or choose from a wide range of RAL colours
