ProtectHOMEOWNER GUIDE
FENSA, CERTASS and window installation paperwork
Ask which compliance route applies to your home and work.
Understand the scope
FENSA is a competent-person scheme for eligible replacement window and door work in England and Wales. It should not be presented as a universal requirement across the UK or for every glazing project.
Check the applicable route
Ask whether the installer will use an appropriate scheme or building control and what certificate you will receive. In Scotland or Northern Ireland, check the relevant local requirements rather than assuming the same route applies.
Separate compliance from guarantees
A compliance document is different from a product warranty or workmanship guarantee. Record all three separately where applicable, including who supplies them and any registration deadlines.
Reviewed 4 October 2026 · ProtectMyQuote editorial guidance
Put the questions into practice
Our report organises questions for your type of job. Our agreement helps you record what is accepted. See the sample documents before deciding.
Make the next step a clearer one.
Ask the right questions. Put the answers in writing.