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Find a FENSA
Approved Installer


Ask if you'll get a FENSA certificate

How can you be sure your window or door installer meets building regulations? Simple, ask if you’ll get a FENSA certificate. It’s all the proof you need.

Why you need a FENSA certificate

  • Confirms compliance with building regulations
  • Shows your installation’s energy efficient
  • Ensures it’s registered with the Local Council
  • Verifies your installer’s guarantee is insured
  • Essential when selling the property



FENSA Certificate

What’s covered?

FENSA covers the replacement of external windows, doors, roof windows and roof lights in your home, against the relevant Building Regulations. Note that the property must be sited on its original footprint, and the use and size of rooms mustn’t be altered.

What’s not covered?

FENSA doesn’t cover replacement windows and doors for conservatories, porches, new builds, extensions, repairs (frame not included), commercial properties.

Did you know?

Not all installers comply with building regulations, and not all of them will register your installation with the local council.

Compliance and registration are required by law.

It’s your responsibility to make sure installations are registered with the local council.

If your installer doesn’t mention that you’re responsible and doesn’t offer a FENSA certificate or other building regulations compliance certificate, you’ll need to pay for an inspection by building control.

You’ll need to allow a few hundred pounds for this and make sure the installer agrees in their quote to rectify any non-compliance issues found by the building inspector.

If there are problems with your installer and you can’t get them back, you may need to hire another to put things right.

When you use a FENSA Approved Installer, they should always promise you a FENSA certificate when the job’s done.

Need Advice?

We’re here to help ensure you always have a good experience with your window and door installers. Have a question? Take a look at our advice column, and if your answer’s not there get in touch with our team.

See Advice

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