So, Are FENSA certificates necessary for all window installations?
When homeowners replace or upgrade their windows, one of the most common questions is whether FENSA certificates are necessary for all window installations. Many people hear about FENSA during the planning stages but are unsure what it actually means or when it is needed. At Skyway Windows LTD, we work with properties across Surrey and understand the importance of meeting the correct standards. In this blog, we explain what FENSA is, why the certificate matters, and whether every installation needs one.
What a FENSA Certificate Is
A FENSA certificate is an official document that confirms your new windows or doors meet current building regulations. FENSA is a government authorised scheme that monitors installers to ensure their work meets the required standards for safety, insulation, and performance. The certificate also confirms that the installation has been carried out by a registered company that follows these rules.
Homeowners often find this certificate useful when selling their property because it shows that the window replacement was completed correctly and meets legal requirements.
Why FENSA Matters
FENSA helps homeowners feel confident that their windows comply with building regulations. Without proper certification, you may need to contact local building control or arrange further checks to confirm that the installation meets the required standards.
Key reasons why FENSA matters
- It confirms the work meets building regulations.
- It provides proof of correct installation for future buyers.
- It avoids the need for separate approval from local authorities.
- It supports long term performance and safety of the windows.
These points are important for anyone replacing windows, especially those planning to sell or renovate their home.
Do All Window Installations Need a FENSA Certificate?
Not every window installation requires a FENSA certificate. It depends on the type of work being carried out.
Installations that need a FENSA certificate
- Replacing existing windows with new ones
- Changing old glazing to new glazing within the same opening
- Installing new frames in an existing opening
These are the most common situations for homeowners, and most standard window replacements fall into this category.
Installations that do not need a FENSA certificate
- Adding windows as part of a new extension
- Installing windows in a new build property
- Fitting windows into an opening that has just been created
In these cases, the work is covered by full building control approval through your local authority or private inspector, so a separate FENSA certificate is not required.
How to Confirm an Installer is Registered
Many homeowners check whether a company is registered through the FENSA installer checker. This tool helps confirm that the installer is approved to self certify the work. Using a registered installer means you will receive your certificate automatically once the job is complete.
Other Requirements You May Need to Know
While FENSA is well known for window replacement, it is not the only organisation involved in home improvements. Energy ratings are explained clearly through the BFRC, and wider building requirements are detailed by LABC. These resources help homeowners understand performance standards and regulations for different types of projects.
Window Styles That Often Require Certification
Most replacement windows fall under FENSA requirements, whether they are modern uPVC designs or traditional frames. Many updated homes choose casement windows, while others prefer the simple design of flush windows. Homes with larger openings often have bay windows, and older properties sometimes rely on sash windows. Character homes in Surrey may also use timber windows. All of these styles require certification when fitted as replacements.
What Happens If You Do Not Have a FENSA Certificate?
If you replace your windows without using a registered installer and do not get building control approval, you may need to apply for a retrospective certificate later. This can be costly and time consuming. When selling your home, missing certification can cause delays or concerns for buyers.
In simple terms, having a certificate helps avoid problems in the future and proves that the work was carried out correctly.
Maintenance and Long Term Value
Once the windows are fitted and certified, regular maintenance helps keep everything in good condition. Cleaning the frames, checking the seals, and ensuring hinges and handles move smoothly all support long term performance. Whether you choose uPVC, aluminium, or timber frames, correct installation combined with proper care helps the windows last many years.
Conclusion
FENSA certificates are necessary for most replacement window installations, but not for every type of project. They provide reassurance that the work meets building regulations and help avoid issues with future property sales. Whether your home uses modern casement windows or traditional sash designs, correct certification supports safety, insulation, and long term performance. If you would like guidance or need to arrange new windows for your home, you can contact us here, and our team at Skyway Windows LTD will be happy to help.
