What does FENSA registered mean for homeowners?
Being FENSA registered means your installer is part of an approved scheme for self-certifying qualifying replacement windows and doors against Building Regulations, giving you the correct paperwork to demonstrate compliance.
FENSA registration is therefore worth checking when choosing an installer, as it provides reassurance that your replacement windows or doors are being installed through an established scheme and that the appropriate certification can be provided once the work is complete.
At Amazing Glazing, we’re proud to be a FENSA-approved installer across Kent. Here’s what that means for you as a homeowner.

What does FENSA registered mean in simple terms?
FENSA stands for the Fenestration Self-Assessment Scheme. It is a UK government-authorised competent person scheme that monitors building regulation compliance for replacement windows and doors in England and Wales. You can find more information about the scheme on the official FENSA website.
FENSA-approved installers, such as us here at Amazing Glazing, can self-certify qualifying replacement window installations and door replacements against current regulations, rather than homeowners having to arrange separate building control approval for the work.
Why was FENSA introduced?
FENSA was created in 2002 after replacement windows and doors became subject to Building Regulations requirements.
FENSA’s mission was to make it easier for professional door installers and window installers to demonstrate compliance while giving homeowners a straightforward way to arrange replacement window installation without dealing with the technical requirements themselves.
The scheme provides a recognised route for the industry to demonstrate that qualifying work has been carried out to the required standards and that installers understand their responsibilities under current building regulations.
What is a FENSA certificate?
Once your qualifying installation is complete and registered, you should receive a FENSA certificate. This provides evidence that your replacement windows or doors have been installed in accordance with the relevant building regulations and registered with the local authority.
A FENSA certificate can provide useful evidence of regulation compliance and should be kept somewhere safe with your other property documents. If you lose your certificate, FENSA provides an online service where you can request a replacement through its certificate service.

Do all replacement windows and doors need a FENSA certificate?
Not necessarily. The legal requirement is for qualifying replacement work to comply with Building Regulations and be properly registered with the local authority.
FENSA certification is one way of demonstrating this. Another is building control approval through your local authority.
FENSA covers replacement external windows, external doors, roof windows and roof lights in homes, subject to its specific requirements. It does not cover projects such as new builds, extensions, conservatories, certain porches or repairs where the frame is not being replaced.
If you’re unsure whether your project qualifies, our team can explain what applies to your property before work begins.

How does FENSA relate to Building Regulations?
FENSA compliance is about more than simply receiving a certificate. The scheme monitors whether qualifying replacement windows and doors meet the relevant Building Regulations requirements.
These regulations cover areas including energy efficiency, ventilation and safety. Modern windows and doors must meet minimum energy standards, helping reduce heat loss and improve the overall performance of your home.
Fire safety can also be an important consideration. For example, where an existing window provides a means of escape, replacing it should not compromise the required fire escape provision. The exact requirements depend on the property and the work being carried out.
For older homes, this can be particularly important. Older properties and older walls were not necessarily designed around modern building regulations, so a proper assessment of the existing structure and proposed installation is important.
Why does FENSA registration matter for property sales?
Your FENSA certificate can remain important long after your windows and doors have been installed.
When you sell your home, a buyer, solicitor or surveyor may ask for evidence that replacement windows and door replacements were installed in accordance with Building Regulations. Having the correct paperwork available can make it easier to demonstrate that the work was properly registered.
Missing paperwork does not necessarily mean you cannot sell your property, but it can create additional work. Depending on the circumstances, you may need to contact your local authority about building control approval or investigate other options, potentially creating extra costs, fees or delays.
Keeping your FENSA certification safe from the start can therefore help make property sales more straightforward and avoid unnecessary issues further down the line. FENSA also explains the importance of certification and documentation for homeowners on its homeowner information page.
Why choose a FENSA-registered installer like Amazing Glazing?
We’ve been installing windows and doors for homeowners across Kent for years, and we’re proud to be a FENSA-approved installer.
Our FENSA approval means we can self-certify qualifying replacement window and door installation work through the scheme. We place a strong emphasis on professional installation and making sure the correct paperwork is handled as part of the process.
We install a wide range of windows and doors, including uPVC casement windows, composite doors and uPVC entrance doors. Whether you’re looking for a cosmetic upgrade or replacing older windows and doors to improve energy efficiency, we’ll help you understand the options available.
Our installations are also backed by a HomePro 10-year insurance-backed guarantee, giving you further peace of mind after the work is complete.
Choosing a FENSA-approved installer means you have a recognised route to demonstrating compliance, while working with us gives you confidence that your replacement windows or doors are being fitted correctly.
Ready to choose FENSA-registered windows or doors?
If you’re considering replacement windows, double glazing, bifold doors or a new entrance door, we can talk you through your options and explain what you can expect from the installation process.
At Amazing Glazing, we’re proud of our FENSA approval and our strong emphasis on professional installation across Kent. From your initial consultation and quotation through to installation, we’ll help make the process as straightforward as possible.
