Company check before hiring window and door installers — the pre-contract screen

The short answer: run the Companies House screen before signing any window and door installers contract: company age, directors' history, filings. For window and door installers work specifically, pair it with the register check (FENSA · TrustMark).

REVIEWED BY: Sean McNamara on 2026-09-03

1. Companies House — exact name from the quote; 3+ years of clean filings is the baseline. 2. Director history — dissolved companies with debts = walk away or tiny stage payments. 3. Ask which certifications the job produces (replacement glazing needs FENSA/CERTASS certification — check the installer and order your certificate) — then verify them after the work. 4. Written scope, fixed price, staged payments, retention — the contract note.

Already in a dispute: window and door installers disputes, the money-back route map.

Independent information directory — not legal advice.

Reviewed by Sean McNamara · 2026-09-03 · Independent information directory — not legal advice.