At Cristal Windows, we prioritise our customers. We make the effort to consistently provide excellent customer service, reliable products that last for years, and top quality double glazing installations. Working alongside a variety of market-leading brands we are able to supply you with many bespoke products that meet your home improvement needs.

As a registered & trusted local double glazing installer in Fleet & Hampshire, our products and installations have passed many tests and inspections from strong industry standard schemes such as FENSA. For more information about our accreditations, please read below.

Which? Trusted Trader in Fleet

Which? Trusted Trader

Cristal Windows is accredited by Which? Trusted Trader. This means that you can be sure that you are leaving your home improvements to your professional double glazing installers. Trusted Traders are used by more than 1 million people each year who are looking for the best trade industries in their area. We are vetted and regulated to meet strict standards of trading.

You are in safe hands with Cristal Windows!

Yale uPVC Window Locks Fleet Hampshire


Yale takes great pride in their beginnings. Everything they are today, we owe to the inspirational ingenuity of Linus Yale Senior and Linus Yale Junior. Yale is a part of the ASSA ABLOY Group. At ASSA ABLOY, they believe that freedom enriches people and that fear makes us poorer.

This benefits you because you can know that all doors and windows come fitted with a Yale lock, to ensure that your home is secure, even when you aren’t there.

Ultraframe Logo


We at Cristal Windows believe in offering the best of the best which is why we offer Ultraframe; manufacturer of industry-leading conservatories, orangeries, replacement conservatory roofs and house extensions.

Ultraframe build each conservatory roof based on the postcode of your property, taking into account the wind and snow loads of your particular area. This means that we can offer an unparalleled service to our customers throughout Fleet and Hampshire.

checkatrade logo


Checkatrade is a directory of recommended and reliable tradesmen who have been fully examined and monitored to safeguard a very high standard of trading.

As a member of Checkatrade, you can see that our reviews are fantastic and a true testament to the excellent customer service and double glazing installations we supply.



We pride ourselves in our excellent customer service.

In the likely event that you have an unresolved complaint; TGAS offers a simple, hassle-free way to resolve a disagreement with a trader over the supply and / or installation of conservatories, windows, doors, roofline or other connected glazing or home improvement products. Being part of The Glazing Arbitration Scheme shows just how serious we are about ensuring our customers receive nothing but the best.


The most up-to-date brand of uPVC frames on the market, Liniar was created by bringing together some of the most knowledgeable and forward-thinking designers in the window industry – with more than 500 years of experience between them, the benefits of uPVC by Liniar are endless.

With a focus on research, development and design, the Liniar range continues to push the boundaries when it comes to product innovation. Rest assured that you are getting the most advanced type of window profile on the market.

Pilkington Logo


Pilkington K is a type of glass that has an intelligent low emissivity (low E) coating.

This valuable technology, used in double glazing, helps significantly reduce the amount of energy required to heat a room and is particularly suited to conservatories as they have several glass windows.

We work alongside Pilkington to provide you with the most beautiful and cost-effective glass options. Save money and improve the thermal efficiency of your home.

Fensa Approved Double Glazing Installer - Cristal Windows


FENSA work with thousands of double glazing companies, in England and Wales, vetting and regulating fenestration installers to ensure they comply with strict regulations.

Here at Cristal Windows, we are a FENSA approved double glazing installer, so you are protected when purchasing new double glazing for your home from us.

Glass & Glazing Federation - Cristal Windows


Over half of the installations completed in the UK are carried out by Glass and Glazing Federation members and are widely familiar as being the world’s leading specialist within the glass and glazing industry.

Choose a GGF installer like us for your peace of mind.

rehau fleet hampshire

REHAU Quality Authorised Partner

REHAU has chosen a selected group of businesses, including us, as official partners. These companies assemble and install REHAU’s uPVC window and door systems according to their strict quality guidelines.

This benefits you because you can be certain that you have chosen a local company who is an expert in the production and fitting of home improvement products in your home.

Sapa Logo


Sapa is a major force in the UK aluminium fenestration industry. They offer architects, contractors, developers, fabricators, installers and clients a wide range of innovative aluminium resolutions for Curtain Walling and Façades, Doors, Windows and Specialist Applications.

Sapa are well known for their durable aluminium frames, which we are proud to offer our customers.

Door-Stop Logo


Door-Stop is renowned for their beautiful, durable, and popular composite doors which we can offer our customers. They are known for their speedy delivery times which means you can expect a quick turnaround from us at Cristal Windows.

We offer Door-Stop doors in a variety of styles, colours, and with a choice of hardware. The customisation options are endless and, as a customer of Cristal Windows, we can help you to create the perfect composite door.

Solidoor Logo


At Solidor, they have been designing, engineering and manufacturing composite doors in the UK since 2004 and their original doors still stand the test of time today. We proudly supply Solidor composite doors as we know first impressions matter and their doors can enhance the kerb appeal of your home instantly.

Their fast-paced product expansion programme has culminated in several markets ‘firsts’ with Solidor being the first company to launch new colours in the composite door sector. Working with Solidor means that we can always offer our customers the best brands on the market.

Endurance Logo


Another composite door accreditation we have is Endurance Doors. They have been manufacturing solid and secure composite doors since 2002. Their timber core composite door offers a 48mm solid core (10% thicker than most) and is the only composite door in the industry with a BBA qualified core.

Cristal Windows chooses to work with Endurance because they offer a huge variety of styles, and each door promotes quality and security, which we want to offer you.

Aluk Logo


ALUK is an international designer and engineer of aluminium building systems, providing a complete range of window, door and curtain walling systems across the UK and the world.

At ALUK they believe collaboration is key. It is why they are proud of the partnerships, including us, that they have built with fabricators, installers, architects and contractors throughout the UK and beyond.

smart logo


Over the past forty years, Smart has grown to become the UK’s leading supplier of aluminium glazing organisations and tailored aluminium extrusions, building a reputation both for the quality of their products and for their product innovation, design and technical expertise.

Their aluminium is of the highest of quality, and they offer a reliable service which is why we want to provide you with their products.

Plamnitherm Glass Installers


Choosing the right glass is very important when you are looking for new windows and doors which is why Cristal Windows are part of the Planitherm Installer Network.

We offer different types of glass depending on your requirements. We can offer you the chance to filter out noise reduction with the glass we install, or to even install glass that protects your furniture from fading – perfect for conservatories!

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