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Guarantees you can depend on

We have rigorous quality control procedures in place throughout our manufacturing lines – and we use the highest quality components and raw materials at all times. That gives us the confidence to offer amongst the longest and most comprehensive guarantees in the industry.

Reassurance with CERTASS
Britannia Windows is registered with CERTASS, a government approved body who will check that the works we complete meet all the necessary standards and building regulations. When we complete CERTASS notifiable work, we will arrange for your CERTASS certificate of compliance to be sent to you for your reassurance. For any further information on CERTASS please visit
Insurance Backed Guarantee – for complete peace of mind
You can be sure your home and your investment is in safe hands when you choose Britannia Windows. All our Windows & Doors come with CERTASS Certification & are Insurance Backed for complete peace of mind.

With over 30 years’ experience in installing home improvement products, we can guide you through every stage of the process from initial ideas through design, survey, building and final installation to make your dream home a reality.

We can guarantee quality products and quality service every time you buy from us, and we are members of numerous organisations and schemes which aim to protect the homeowner when purchasing home improvement products.
Exceptional quality, guaranteed
Britannia Windows has been audited through BSI, achieving Quality standard ISO 9001.

We offer a wide range of products including uPVC and aluminium windows and doors, glass conservatories and solid tiled conservatories, glass extensions, and uPVC roofline. Our windows and doors carry a written guarantee of up to 10 years*, ensuring exceptional product quality even years after installation.

*Conditions apply, please ask for details.