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Only the very best in uPVC casement windows.
We wouldn’t have it any other way.

So much more than just replacement windows…

Casement windows are what most people think of when picturing the typical window. But there’s nothing typical about our casement windows. Double-glazed, and with steel-reinforced uPVC frames as required, each unit we manufacture represents an unparalleled union of security, resilience, energy efficiency, flawless design and masterful craftsmanship.

flush casement windows overlooking a garden


Our uPVC casement windows are fabricated using Kommerling’s 70mm Ovolo profile. We have been using the Kommerling profile the whole time we have been in business and truly believe it is the best on the market.
terraced houses displaying uPVC casement windows


What could be more important than the safety of your family? Our windows boast glazing that is incredibly tough, locks of unflinching quality, and frames purpose built to withstand the most ardent punishment – reinforced, where necessary, with galvanised steel for true strength.

stone-walled house with timber-effect uPVC windows


High-performance five-chamber profiles, Argon-filled double glazing, warm-edge-spacer-bar technology and low-e coatings combine to create a window of unbeatable thermal efficiency.

No more heat lost through your windows: our insulating glass units create a tight seal that keeps the cold out and the warmth where it belongs – on the inside of your home.

close-up of uPVC window frames in a red-brick house


Choose from a combination of little top openers, full side openers, bottom openers and many more configurations. And when it comes to colour, texture and finish, there’s no reason to settle for just plain white.

Mimic the timeless, rustic aesthetic of your old timber windows – or opt for dynamic, sleek sightlines for a more contemporary impact.

detached, brick house with uPVC casement windows


We’ve been installing the highest-quality uPVC windows throughout Greater Manchester and Cheshire for the best part of 30 years. With that comes a wealth of experience and product knowledge, which we are only too happy to impart.

We’ll never, ever use high-pressure sales tactics – just honest advice and a commitment to getting it right for you – first and every time.

Exceptional customer service from beginning to end – no exceptions.

We employ our own surveyors and installers. In fact, some of them have been with us for more than a decade and are very much part of the Alexander Windows family. They take pride in the work they accomplish – as do we! There’s no middleman – no contractors to deal with – just excellent service from time-served tradespeople whose only incentive is to do the very best they can for you and your home.

Lots of companies will replace your windows for you, but we’ll do it with care and skill – treating your home no differently than we would our own.

  • Benefit from the unique Alexander Windows Lifetime Guarantee

  • Our environmental record is among the best in the industry

  • We have gained the coveted support of Trading Standards – a testament to the quality of our service

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Any Questions?

What does The Alexander Windows Unique Lifetime Warranty cover?

We guarantee to replace or repair any frame covered by this warranty which proves defective due to yellowing, corrosion, faulty workmanship or faulty materials, for as long as our original customer remains in residence at the installation address.

This warranty covers double-glazed units, locking mechanisms and hinges, but does not cover accidental damage or natural weathering and tarnishing. Some other products are covered by specific guarantees, each of which is amongst the best available in the relevant sector.

What are casement windows?

A casement window is a window that is attached to the frame by one or more hinges, with an opening mechanism which cranks the window open outwards. Casement windows can come top hung, bottom hung, side hung or fixed.

What makes casement windows better for my home?

Versatile in design (being suited to almost any property) they are also easy and safe to use, offering unobstructed views of the outside whilst allowing for excellent ventilation when opened. When closed, they create an airtight seal to keep your home well-insulated and energy efficient.

They are also extremely secure, especially when double-glazed and constructed from the high-quality KÖMMERLING uPVC frames employed by Alexander Windows.

What’s special about KÖMMERLING frames?

KÖMMERLING are industry leaders for a reason. Their frames are beautifully designed and expertly fabricated in compliance with BS7412, BS7413, PAS023, PAS024 and BS7950 specifications, offering an aesthetic that’s simply superior to any other uPVC window out there. KÖMMERLING frames can come steel-reinforced where needed, adding greater strength and security. Add to that multi-point locking and rigorous testing under extreme conditions, and you have a window that guarantees to keep your home safer, more secure, and better protected from damp, draughts and cold weather.

KÖMMERLING’s 5-chamber internal profile boosts thermal performance, whilst the company itself remains committed to sustainability and ethical practices, employing lead-free processes and recycled materials in the manufacture of its uPVC products.

Looking for advice?

Call us on 0800 954 2500

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