Transforming the fenestration industry

Our comprehensive range of testing and certification services for windows and doors can bring you to complete peace of mind whether you manufacture windows and doors, are a window installer, or you are looking to source quality products.

If you are a systems house or fabricator, gain proof of performance for your products so that you can tender for new business opportunities, and get your products to market more effectively.

If you are a specifier you can be confident the products you procure are high quality and reliable, by specifying the BSI Kitemark.

If you are a windows installer you can demonstrate quality workmanship and your commitment to customer service by gaining a BSI Kitemark for your installation service.

At BSI we pride ourselves as the partner of choice for Windows and Doors certification, to strengthen this we have launched three exciting new products to help you stand out from the crowd:

• Approved Document Q Verification - this new scheme helps installers to save time, reduce admin and prove compliance through having documentation in their own company name. Eliminating the need to depend on supply chains to cascade the necessary paperwork, minimising disruption and delays. Find out more

• Hardware for Windows and Doors Kitemark - demonstrate that products have undergone third party certification from production assembly through to installation with this new Kitemark, proving your hardware meets industry recognized standards. Find out more
• Entrance Doorset Dual Certification - for doorsets which require both fire and enhanced security characteristics to help minimize risk and enhance compliance for manufacturers. Find out more

Our service includes CE marking on a product, third-party certification with a BSI Kitemark to British and European standards, or your specific test requirements.

We work with system houses and fabricators and we test the following products (including bi-fold doors):

• PVC-U windows, doors and profiles
• Aluminium doors and windows
• Timber doors and windows
• Steel and composite doors and windows
• Locks - download factsheet (PDF) >
• Rooflights

Our testing services include weathertightness, endurance and security testing.

BSI are experts in European and UK market access requirements. And with one of the widest ranges of market access solutions, years of industry experience and expertise, we can work with you to navigate this landscape.

We are ready to respond, to your UKCA requirements and are one of the first Approved Bodies to offer UKCA marking services.

Learn more about UKCA marking and CE marking, or get in touch with our team of experts.

The UKCA (UK Conformity Assessment) mark is the new UK product marking that will be required for certain products being placed on the market in Great Britain (England, Wales and Scotland). It covers most products that previously required the CE mark.

From the 30th June 2025, CE Marking will no longer be accepted for construction products and UKCA will be required.

You can learn more about UKCA here >

Our dedicated laboratory offers you innovative and efficient testing and certification solutions, saving you time and money. We can also help you gain certification to other schemes giving you even greater market access.

Our dedicated team of professionals (our certification managers, client managers, laboratory technicians and business development managers) support the certification process with in-depth regulatory knowledge combined with product development expertise. We have a thorough understanding of the intricacies of the testing process and can help you every step of the way. 

Time for a change? Whether you've missed a transition deadline or looking to change your Certification Body, BSI can help you with a smooth and straight-forward transfer.

As the UK leader when it comes to certification, we provide unparalleled support for our clients. With a wealth of resources, tools and expert advice, we can get you where you need to be.