Does my flat front door need to be a fire door?

Yes for any flat in a multi-occupancy building (covered by Fire Safety Order 2005 / Regulatory Reform Order). Single-house front doors not regulated as fire doors. Flat doors must be FD30S minimum, FD60S in HRBs + 18m+ buildings + sole-stair lobbies.

Can I install a fire door myself?

Installation must be by competent installer — FIRAS-certified or equivalent. Self-install invalidates certification. Substitution of any component (hinge, lock, seal) for non-tested item invalidates certification. Penalty: fire door non-compliant, insurance void, criminal liability under FSO 2005.

How long do fire seals last?

Intumescent seals: 10-year design life if undisturbed. Smoke brush seals: 5–8 years (replace when worn/missing). Annual visual check by Accountable Person mandatory in HRBs + all communal areas. Self-closer: 5-year service interval recommended.

Fire Door Replacement Cost London 2026 | Builderr

How Much Does Fire Door Replacement Cost in a London Flat?

London flat fire door FD30S costs £450–£1,850 supplied + installed. Budget engineered fire door £450–£750. Mid-range factory-finished FD30S £750–£1,250. Heritage panelled FD30S in conservation area £1,250–£1,850. FD60S for HRB +£250. Mandatory third-party certification (BWF/BM Trada/Certifire) + self-closer + intumescent + smoke seals + cold smoke threshold. Flat entrance doors regulated separately under FSO + RRO.

FD30S vs FD60S specification

FD30S: 30-minute fire resistance + smoke seal. Standard for flat entrance doors + protected stair doors in 2–4 storey blocks. FD60S: 60-minute fire resistance. Required for flat entrance doors in HRBs (since BSA 2022 implementation) + buildings 18m+ + buildings with protected lobbies. Construction: 44mm thick solid timber core or engineered fire-rated core (e.g. Tubeboard, Halspan), facing veneer or paint-grade, lipped edges, mortice lock + cylinder hardware fire-rated. Self-closer mandatory (Briton 2003 / Dorma TS83 / Geze TS5000 — overhead arm or concealed). Intumescent seal (Mann McGowan, Lorient) in groove all 4 edges; smoke seal (brush + sweep) at threshold + perimeter. Cold smoke threshold: drop-down seal or rebated threshold.

Third-party certification + golden thread evidence

Mandatory third-party certification: every fire door installed must have certification label (BM Trada Q-Mark, BWF-CERTIFIRE, Warringtonfire) fixed to door edge — visible permanently. Certification covers: door leaf + frame + intumescent seal + ironmongery as tested assembly. Substitution of components (e.g. swapping out tested cylinder for cheaper one) invalidates certification. Installer must be FIRAS or equivalent certified. Certificate retained in flat + building golden thread. Increasingly enforced by building control + insurance assessors post-Grenfell — uncertified fire doors increasingly grounds for insurance cover refusal.

Heritage + listed building solutions

Conservation areas + Grade II listed buildings frequently want original/period panelled entrance doors retained. Solutions: (1) retain + upgrade — fire-resistant intumescent paint (Envirograf, Nullifire) to inside face + intumescent seals retrofit into edges + new fire-rated cylinder + close-fitting self-closer; achieves FD30S-equivalent at £950–£1,650 + LBC. (2) bespoke replica fire door — new FD30S/FD60S door faced with period-style panels + mouldings; £1,650–£2,850. Builderr's Barbican Estate (Grade II) case study retained original ash-veneer flat doors with intumescent retrofit upgrade — accepted by Building Control + Accountable Person.