Skip to main content

Extreme UPVC Windows

Extreme UPVC Windows are one of the most advanced windows on the market and come with a 20 year guarantee…

For ultimate style and performance

Our new Extreme UPVC Windows collection is unrivalled by any other window on the market. Using the most innovative UPVC and performance glazing matched with carefully chosen hardware and accessories, ensures that your windows are not only secure, energy efficient and durable, but also stylish and guaranteed to last a lifetime. The only window that ticks all the boxes, we’re proud to declare that we’ve tested our window to the Extreme!

Extreme UPVC Windows

Our engineered UPVC profile and superior glazing also ensures your UPVC windows will be super energy efficient, meaning you’ll save money on your energy bills and keep the temperature in your home comfortable and regulated.

Plus, we’re delighted to offer a huge range of sophisticated colours and styles to help you choose the right look for your home.

Grey Extreme UPVC Windows
Extreme UPVC Windows

Explore popular Extreme UPVC windows

The most famous window styles are all included in our UPVC window range, including casement windows, sliding sash windows, bay & bay windows and tilt & turn windows.

Cream UPVC Cottage Windows

Casement UPVC Windows

A practical and stylish option, the popularity of casement UPVC windows is entirely owed to its simple design and suitability to everyday living.

UPVC Tilt & Turn Windows

Tilt & Turn UPVC Windows

Extreme tilt & turn UPVC windows are a fantastic choice for those looking for a wider opening, allowing more fresh air to circulate into your home.

UPVC Sash Windows

Sash UPVC Windows

Our sliding sash UPVC windows give you a perfect mix of strength and practicality, all in one single design, and their vertical opening is a priceless feature.


Request your free quote

Simply fill in your details for your free, no obligation quotation, and click “Get Quote”

Your details
What would you like a quote for?
Content Block
  • Hidden

Do your windows have EXTREME protection?

You cannot take your eye off the ball when it comes to security – we certainly don’t! The EXTREME UPVC Windows collection is very security-focused, with each window having 11 visible locking points. This means it offers 3 times the protection of a traditional window.

  • EXTREME enhanced security with centre VAULTBOLT and multi cam locking technology.
  • EXTREME enhanced durability with UNIQUE superglide gearbox ensures smooth operation.
  • EXTREME enhanced COMPRESSION and acoustics with interlocking hinge bolts and optimum weatherseals.
casement windows

Herculean Hinge

Heavy duty, highly engineered hinges that provide increased load bearing. With anti-crowbar technology and sustained use for a lifetime.

Extreme Locking

Up to 9-point locking system and two high compression hinge bolts to create 360-degree solidity. Also available with enhanced security option designed to meet the requirements of the police-recognised Secured by Design initiative.

Extreme Frame

Highly engineered frames, that encompass 14 chambers (combined sash and frame) to provide supreme thermal performance. Maximum protection against twist and ageing so your windows will look and operate like new for longer.

Extreme Weather Seal

Dual density and high elasticity for twice the standard coverage. Long lasting airtight protection from the elements and added noise reduction.

Ultimate Glass

High performance next generation glass for superb energy efficiency. Ultra-clear outer pane and a super soft coat inner pane. Improved clarity for the perfect view.

Extreme Handles

Our Extreme Handles come in a range of colours to suit your home. Built to last with robust materials and quality finishes.

Huge long-term energy savings will be made…

Household fuel costs have reached scary levels in recent times and are hitting people’s finances hard. If you’re paying well over the odds for energy, the best solution is to replace your old existing windows and have modern UPVC windows fitted in their place.

Heat loss will be practically halted, and any draughts that you used to feel indoors will disappear. The result? A warmer home that costs far less to heat, saving you a fortune.

White UPVC Windows
Oak Envisage Flush Windows
White UPVC Windows

Extreme UPVC windows bespoke to you

Straight after selecting a UPVC window style, it’s time to customise the window design. You can do so with one of a wealth of coloured finishes, and your favoured form of glazing and hardware.

An eclectic choice of finishes, colours, and combinations…

Whilst there’s nothing wrong with traditional white, far from it, Classic UPVC windows can be finished in whatever colour you want. The paint application process that we undertake is sophisticated enough to produce even the most unconventional colours. There’s a growing demand for newer offerings such as Grey and Irish Oak too, which have an aesthetic appeal equal to that of Whitegrain and Chartwell Green.

Glass that expertly merges style and privacy…

When it comes to replacing your windows, the glass really does matter. The glass you choose for your Extreme UPVC windows can make a big difference – so make sure you give some thought to how much visibility you want to achieve. Be it ultimate privacy or a clear, uninterrupted view of the beautiful outdoors, we have the perfect glass for you. Our Clearview team will be on hand to advice you at every step.

Handles crafted with care…

When you see our many traditional and contemporary-styled handles in the flesh, it will hopefully be immediately apparent just how much effort our craftspeople have gone to with their styling.

Engaging the secure locking system within your chosen handle will keep your windows securely fastened.

White Leaded UPVC Windows

Why you should choose Extreme UPVC windows from Clearview

If you’re looking to replace your old UPVC windows, it’s important to get the right UPVC windows for your home. Whether it’s to lower your fuel bills or you’re looking to improve the aesthetics of your home, Clearview is here to help you find your perfect windows.

We offer so many different UPVC window options it’s easy to feel overwhelmed. Our design team is on hand to demystify our window range and create the perfect replacement glazing for your home. Visit our showroom or book your free design appointment to get started. Plus, when you choose Clearview UPVC windows you get complete peace of mind thanks to our 20 year guarantee.