Quality UPVC Windows

High-quality windows that add value to your home whilst also providing unbeatable protection

As experts in the supply and installation of Duraflex windows, we are confident we can help add value to your home with a selection of revolutionary window profiles. From UPVC casement windows to vertical sliding and sash horn windows, we offer both modern and traditional designs for today’s home.

Coldseal Home Improvements has the window solutions you are looking for. Our UPVC double glazed windows combine the very best of British engineering and design, providing you with striking slimline windows that provide exceptional efficiency and security.



Duraflex Windows

Our Duraflex UPVC double glazed windows combine beautiful looks with advanced technology, making them one of the most popular window profiles in the UK.

As one of the most technically advanced UPVC profiles on the market, the Duraflex window offers an unrivalled design, boasting superior energy efficiency and security. Our British manufactured windows promise long lasting aesthetics and eco-friendly materials. Coming with a 10 year manufacturer’s guarantee, our Duraflex windows are designed to last.

A + Energy Rated

Reaching the highest possible energy rating standards, our state of the art window systems are capable of achieving an A+ energy rating. This is all possible due to a multi-chambered system which offers superior insulation as well as structural rigidity.


All our Duraflex products are 100% lead free, making them environmentally friendly and fully recyclable – a must have product in these eco-conscious times. Our windows are better for the environment and expertly engineered to help reduce your carbon footprint.

Elegant Looking UPVC Windows

High quality finishes, slimline aesthetics and a choice of contemporary and modern designs makes for great looking uPVC windows. Our comprehensive range of windows can be fabricated to meet any style you desire. Choose from a classic collection of colours and finishes, including a luxury choice of bespoke shades which include Grey and Chartwell Green.

Powerful Design

Secure great peace of mind with our high security double glazing. Benefit from high security locking systems that come with a 10 year insurance backed guarantee – further proof of their superior longevity.



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