Infinity Windows

The ultimate timber alternative

Infinity is the most stylish, advanced and high-performing timber-alternative window and door range currently available in the UK market.

Faithfully replicating traditional timber with all the bene ts of Composite PVC, no more painting, and great thermal performance.

All Infinity windows are A+ rated for energy eficiency and conform to British Standard PAS24 and are Secure By Design accredited. During rigorous testing the products achieved the highest weather ratings achievable. The cutting edge manufacturing technology gives Infinity the smoothest corner joints for ultimate style and good looks.

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When it comes to selecting the best products to enhance and protect your home, you want to be sure you’re making the right choice.

Beautiful, stylish, expertly made, our Infinity Window and Door Collection made up of uPVC Flush, Sculptured and Chamfered Sash windows and doors strike the perfect balance between energy ef ciency, security and design.

Easy to maintain, energy ef cient and boasting an innovative smooth corner weld design that lets you make a distinct style statement, the Infinity Window and Door Collection is the revolutionary new choice for all homeowners that wish to install uPVC windows and doors.

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There’s no compromise when it comes to security. The bespoke locking keep has a useful night vent locking position and also helps to achieve enhanced security accreditation PAS24, a British Standard all of our Infinity products have achieved. The bespoke locking keep has a useful night vent locking position, ensuring it meets the enhanced security accreditation, PAS24, a British Standard met by all our Infinity products.

Our wide range of modern, contemporary and period style windows incorporate the latest built-in safety features, including internal glazing beads and multi point locking systems.

To provide enhanced resistance to forced entry our windows can be tted with a hinge protector device between the frame and the sash opener. Anti-bump, anti-snap key locking cylinders can be installed on all our Infinity doors to further enhance their security.


To keep out the wind and rain we use our patented high performance, multifunctional weatherseals. The airtight seal this creates helps to maintain your comfort inside your home.

The Flush Sash dual seal is exceptionally watertight, with the added benefit of concealing any hardware. Any water that has found its way inside is quickly evacuated due to the intelligently designed integral drainage gutter.


Our Infinity Flush, Sculptured and Chamfered Sash windows look great in any surrounding, from country cottages to modern townhouses. Their subtle charm and elegance will transform your home.

If you live in a Conservation Area, home improvements such as replacing your windows and doors will require planning consent as there are strict guidelines to ensure that architectural features are preserved.

We have designed the Infinity Window and Door Collection with this in mind; replicating the appearance and style of traditional timber windows with features such as our authentic Wood Grain Finish, Monkey Tail Handles and Georgian Bar options. However, you should always obtain consent from a planning/conservation of cer before proceeding with an installation.

There are a wide range of glass effects from which you can choose to closely match the pattern you prefer. All our Infinity glass options are available toughened or laminated for your security and safety.

From double glazed windows, composite doors to roofline. When you choose McDermott Windows, you can be guaranteed it will not only look great, but will last a life time

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