Findfitter Team

The Findfitter editorial team is a small UK-based group focused on giving British homeowners straight, no-pressure information about double glazing, doors and home-improvement quotes. Every guide on this site is researched against current FENSA / Certass / GGF standards and public price benchmarks — and every recommendation is independent. We do not take payments to feature individual installers in editorial content. Have feedback or a correction? Email hello@findfitter.co.uk.

FENSA vs Certass vs Trustmark Explained

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📅 Updated April 2026 · ⏱ Full guide in progress · ✍️ Findfitter Team Three UK schemes certify replacement window installers: FENSA, Certass, and Trustmark. They sound interchangeable — they’re not. Here’s the short version while our full guide is being finalised. What they have in common All three are Competent Persons Schemes authorised by … Read more

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