FENSA
The Fenestration Self Assessment Scheme (FENSA) is the largest scheme for installers that are trusted by Local Authorities, industry and Government and was founded in 2002. FENSA cover replacement window and door installations in England & Wales. FENSA Scotland was founded in 2021, covering replacement window and door installations in Scotland. FENSA does not cover installations on The Isle of Man.
Benefits of FENSA certification:
- Confirms compliance with building regulations
- Confirms compliance with building regulations
- Ensures it’s registered with the Local Council
- Verifies your installer’s guarantee is insured
- Ensures it’s registered with the Local Council
What’s Covered:
FENSA covers the replacement of external windows, doors, roof windows and roof lights in homes in England, Wales & Scotland 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 covers the replacement of external windows, doors, roof windows and roof lights in homes in England, Wales & Scotland 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.