Understanding FENSA Certificate requirements

2 April 2020

Aluminium fixed pane window

What is FENSA?

FENSA is the ‘Fenestration Self-Assessment Scheme’ and was set up by the Glass and Glazing Federation (GGF). It is a government authorised scheme that monitors building regulation compliance for replacement windows, doors and roof lights in England and Wales.

FENSA certification is a means to self-certify compliance under Building Regulations without the need for a separate assessment from Building Control.

When is FENSA certification required?

FENSA certification is required to confirm that your replacement windows, doors and roof lights are in compliance with building regulations. It is required when you are replacing external windows, doors, roof windows and roof lights within the original footprint of the property when the use and size of rooms isn’t altered.

If your glazing falls into any of the below categories, FENSA certification isn’t required:

  • New build
  • Extensions
  • Porches
  • Conservatories
  • Commercial properties
  • Repairs (frame not included)

Are EXACT projects FENSA certified?

All of the projects that we work on are either new builds or extensions, which are covered by Building Control regulations, not FENSA as outlined above. Approval for your whole new build or extension project including the glazing (fenestration) is required. Your architect or builder will be able to assist you with this.

During a new build or extension, your building control surveyor will visit the site several times to check work is being carried out to the correct standard. Upon completion a certificate will be issued to you.

As an experienced architectural glazing company, we only work with likeminded companies to ensure the quality and finish of the project. All of the products in our carefully curated glazing range are compliant with Building Regulations and are installed by experienced fitters, using only high-quality fixings and sealants.

Do you need a FENSA certificate for your project?

If your project is a new build, extension, porch, conservatory, commercial property or repair, a FENSA certificate is not required. As the homeowner, you are ultimately responsible for ensuring that the glazing and installation complies with the required standards and regulations.  

Still not sure if you need FENSA certification?

If you have any doubts about your project, speak to your architect or builder – or one of our Project Managers who will be able to provide you with clarification.

At Exact, our end-to-end project management approach sets us apart from the crowd, we’re passionate about the glazing and service we provide to all our clients. Working with us for your project means one reliable, dedicated and professional team from enquiry, to installation and aftercare. Simplifying your planning and reducing your workload!

Find out how we work

To chat to one of our Project Managers about your project, get in touch today 01428 748255, or send us the details of your project and request a call back.




Get in touch today to discuss your next project with one of the Exact team and find out why working with us could be the solution for you.



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