FENSA (the Fenestration Self-Assessment Scheme) was established in 2002, in response to the new building regulations in England and Wales. It aimed to allow companies to self-certify compliance with these regulations for window and door replacements.

FENSA (the Fenestration Self-Assessment Scheme) was established in 2002, in response to the new building regulations in England and Wales. It aimed to allow companies to self-certify compliance with these regulations for window and door replacements.