By the DC Fire & Security engineering team — installing and maintaining fire and security systems since 2010. Updated June 2026.
Every component on a fire door is a compliance decision: closers to EN 1154 (power size 3+), hinges to EN 1935 grade 11–13 with pads where specified, locks/latches fire-tested with intumescent kits, letterplates/viewers in rated assemblies, and 'Fire door keep shut' signage to spec. Hardware budgets run £150–£400 per door fully dressed — van-stock substitutions are how certified doors quietly die.
How certified doors decay in service: maintenance swaps a failed closer for the van's lightest unit (size 2, unrated — the door now drifts ajar), a broken hinge gets a single mismatched replacement (the odd-hinge line the hinges guide flags), a lock upgrade drills for a bathroom indicator (unrated, unpadded), and a decade later the inspection reads 'non-compliant hardware throughout' on a doorset that left its factory perfect. The chain-of-components discipline answers it: like-for-like (or certified-equivalent) replacement policy written into maintenance contracts, hardware schedules per door retained from installation (the documentation habit paying forward), and stores/contractor instructions naming standards (EN numbers on the purchase order — boring, decisive). Fire doors are systems; hardware is where systems meet screwdrivers.
Budget shapes: dressing a door fully (closer + hinges + latch + seals + signage) runs £150–£400 in components by specification tier — heavy-traffic and free-swing choices at the top; flat-entrance security-and-fire furniture suites (the replacement guide's integrated sets) price within doorset packages. Procurement sanity: buy hardware with doors wherever possible (doorset-integrated = tested-together — the recurring doorset dividend), match replacement purchases to door schedules (the records, again), prefer manufacturer-matched closers on spec doorsets (warranty and evidence both), and resist the merchant aisle's gravitational pull on letterplates/viewers (rated versions exist for everything penetrating a fire door — stock them, specify them, end the £12 substitutions). Our remedial visits carry the compliant menu van-side: the substitution failure mode dies where the van stocks right.
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