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Fire Rated FD30 Front Doors

Fire Rated FD30 Front Door — Flats, New Builds, HMOs and High-Value Homes

FD30, FD30S and FD60 explained

A fire rated front door for your home, flat or development that also meets serious security standards

Every SteelR door carries FD30S fire and smoke rating as standard. Not as an upgrade, not on selected designs. On every door. FD60 is available as an upgrade where the application requires it. This page explains what the ratings mean, where they are legally required, and how fire rating combines with PAS 24, SR3 and Secured by Design on a single door assembly.

There is a broader sibling page on fire rated steel doors aimed at developers, architects and housing associations specifying at scale. This page is focused on the front door of an individual home, flat or HMO.

The rating itself

FD30 is 30 minutes of fire integrity, tested to BS 476-22 or BS EN 1634-1

FD30 rating is awarded against a standardised fire resistance test, typically to the UK standard BS 476-22 or the European equivalent BS EN 1634-1. The door is installed into a test furnace rig and exposed to a defined fire curve rising to above 800°C over the test duration. For FD30, the door must maintain its structural integrity and prevent flame passage through the leaf, frame and door-to-frame seal for a minimum of 30 minutes.
FD30S adds smoke performance to the rating. The S suffix means the door has also been tested against cold smoke passage through intumescent seals and smoke brushes fitted to the leaf and frame. Cold smoke is a major cause of fatality in dwelling fires, often before the fire itself reaches occupants. FD30S is the current best-practice rating for flat entrance doors and is the standard on every SteelR door.
  • FD30: 30 minutes integrity against flame and hot gas
  • FD30S: 30 minutes integrity plus cold smoke seal performance
  • FD60: 60 minutes integrity against flame and hot gas
  • FD60S: 60 minutes integrity plus cold smoke seal performance
Fire rated FD30S black steel flat entrance door with double letterbox

Where it is legally required

Approved Document B, Fire Safety Act 2021, Building Safety Act 2022

Approved Document B of the Building Regulations mandates FD30 as a minimum on entrance doors to individual flats within multi-occupied residential buildings. The Fire Safety Act 2021 extended the scope of the Fire Safety Order 2005 to explicitly cover flat entrance doors in common parts. The Building Safety Act 2022 introduced a higher-risk building regime and a gateway process for residential buildings over 18 metres, with stricter enforcement on fire door specification and maintenance.
For houses in multiple occupation, FD30 is typically required on entrance doors and internal protected escape routes. For individual private dwellings, FD30 is not legally required on the front door but is often specified by insurers on higher-value properties and is a sensible upgrade where the property has high-value contents or complex evacuation geometry.

Fire plus security plus thermal

One door, four certifications, plus thermal engineering

The practical advantage of a bespoke steel door is that fire, security and thermal performance are engineered into the same assembly rather than chosen between. Every SteelR door is FD30S rated, PAS 24 certified, SR3 rated to BS EN 1627 Class 3 and Secured by Design approved as the standard specification. The thermal break is built into the base profile so U-values meet or exceed Part L.
Upgrades are available against every dimension. FD60 replaces FD30S where the application requires 60-minute integrity. SR4 under LPS 1175 Issue 8 replaces SR3 where a commercial-grade security certification is specified. Both can be applied to the same door assembly. The full specification stack is set out on the security specification page.

Installation

A fire door is only rated in situ if installed to specification

Fire door certification is awarded against a complete assembly installed against a defined fixing specification. Incorrect installation invalidates the rating in practice because the tested assembly is no longer what is in place. Issues commonly seen on third-party installations include incorrect gap clearances (compressing intumescent seals beyond their rated range), missing cold smoke brushes, frame packing that breaks the tested fixing line, and incorrect hinge specification that prevents the leaf closing fully under fire conditions.
Every SteelR installation is carried out by our own in-house fitters to the specification the door was certified to. The FD30S certificate supplied at handover applies to the door in situ, not just the door as it left the factory. For flat and HMO applications where fire door inspection regimes apply under the Fire Safety (England) Regulations 2022, the installation and certification records are provided as part of the handover pack for the building's responsible person to file.

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Related reading

Fire rated steel doors for developers and architects

Broader coverage for new builds, flats, HMOs and housing association specifications.

SR3 residential steel doors

The security rating that sits alongside FD30S on every SteelR door.

Secured by Design steel front doors

The UK police-preferred specification, which sits on top of PAS 24.

Common Questions

Frequently asked questions

What does FD30 actually mean on a front door?

FD30 means the door is rated to resist the passage of fire for 30 minutes under a standardised fire resistance test, typically to BS 476-22 or BS EN 1634-1. Integrity is maintained for 30 minutes, giving occupants time to evacuate and fire services time to arrive. FD30S adds the S for smoke, which means the door also resists the passage of cold smoke under separate testing. FD60 is the 60-minute equivalent, required in higher-risk applications.

Where is an FD30 front door legally required?

FD30 is required on entrance doors to individual flats within multi-occupied residential buildings under Approved Document B of the Building Regulations. Since the Building Safety Act 2022 and the Fire Safety Act 2021, enforcement is materially stricter, particularly in buildings over 11 metres. HMOs, houses in multiple occupation, typically require FD30 or higher on entrance and bedroom doors. Standalone dwellings do not legally require FD30 on the front door, but the rating is often specified by insurers or architects for high-value properties.

What is the difference between FD30 and FD30S?

FD30 is a 30-minute fire integrity rating. FD30S adds the S suffix for smoke seal performance, meaning the door is also tested against cold smoke passage through intumescent and smoke seals fitted to the frame and leaf. FD30S is the current standard for flat entrance doors in multi-occupied buildings because cold smoke is a major cause of fatality in dwelling fires, often ahead of the fire itself reaching occupants. Every SteelR door is FD30S rated as standard.

Do I need FD60 rather than FD30?

FD60 is required in specific applications: doors onto protected escape routes in larger buildings, doors in stairwell enclosures, doors in higher-risk buildings as defined under the Building Safety Act, and doors where the building's fire strategy specifies 60-minute rather than 30-minute compartmentation. A fire risk assessment or the building's approved fire strategy document will specify the requirement. SteelR offers FD60 as an upgrade on every door where the application requires it.

Can one door be fire rated, security rated and thermally engineered all at once?

Yes, and every SteelR door is all three as standard. FD30S fire and smoke rating, PAS 24 security certification and SR3 rating to BS EN 1627 Class 3 are all applied to the same door as standard. Secured by Design approval is also included. Thermal break engineering is built into the base profile. SR4 under LPS 1175 Issue 8 and FD60 are both available as upgrades. The point of a bespoke steel door is that you do not have to choose between fire, security and thermal performance; the door is engineered to deliver all three simultaneously.

PAS 24 CertifiedSR3 & SR4 RatedLPS 1175 TestedSecured by DesignFD30S Fire RatedISO 9001 CertifiedUK Manufactured

Fire, security, thermal. One door.

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