HMO Fire Doors: Requirements, Specifications, and Compliance in London

**What is an FD30 fire door?**

FD30 denotes a fire door rated to provide 30 minutes' fire resistance — specifically, 30 minutes of resistance to the passage of flame and hot gases through the gap between the door leaf and the frame. The 'FD' prefix indicates 'fire door'; the number indicates the resistance period in minutes.

FD30 doors are tested to BS 476-22 or BS EN 1634-1 standard. Third-party certification by a UKAS-accredited body (typically BM Trada, Exova Warringtonfire, or Chiltern International Fire) provides evidence of compliance.

**What is an FD30S fire door?**

FD30S is an FD30 fire door with the additional specification of **smoke seals** — the 'S' suffix denoting smoke control. The smoke seal is typically an intumescent strip (which expands in heat to seal gaps) combined with a cold smoke brush seal (which blocks cold smoke before the intumescent seal activates in a fire).

For HMOs, FD30S (fire door with smoke seals) is the required specification for all doors onto the escape route — meaning all bedroom doors, kitchen doors, and living room doors where those rooms open onto the escape staircase or corridor. The smoke seal is critical because most fire fatalities occur from smoke inhalation rather than flame — blocking cold smoke buys critical extra time for escape.

**Why smoke seals matter in HMOs**:

In a shared house (HMO) where multiple occupants may be sleeping in separate rooms with their doors closed, the priority in a fire is to: 1. Alert all occupants (via the fire alarm) 2. Allow all occupants to escape before smoke fills the escape route

Without smoke seals on bedroom doors, cold smoke from a kitchen fire (for example) can fill the first-floor landing corridor within minutes — blocking the escape route for upper-floor occupants before they have had time to respond to the alarm and escape. FD30S smoke seals (intumescent + cold smoke brush seal) delay smoke passage for 30 minutes — sufficient in most cases for emergency services to attend and occupants to escape.

**FD60 fire doors**:

• FD60 (60-minute fire resistance) doors are required in some higher-risk situations:
• •More than three storeys above ground level
• •Where the escape route passes through or adjacent to a high-risk room (e.g., a room with significant cooking facilities on a staircase landing)
• •Where the HMO Fire Risk Assessment identifies a specific need for 60-minute protection

For most three-storey London Victorian terrace HMOs, FD30S on all habitable room doors onto the escape route is the standard requirement. FD60 is less common but should be confirmed with the borough's housing team or fire risk assessor.

**Which doors in an HMO must be fire doors?**

The requirement for fire doors in an HMO applies to all doors that open directly onto the 'protected escape route' — the escape corridor and staircase. In a typical London Victorian terrace HMO:

• *Ground floor*:
• •Front door from outside (not typically a fire door — the escape is outward through the front door)
• •Rear door (where it opens onto the escape route — check with fire risk assessor)
• •Kitchen door (where the kitchen opens onto the escape corridor or staircase) — FD30S required in most HMOs
• •Living room door (where it opens onto the escape corridor) — FD30S required in some HMOs depending on layout

• *First floor and above*:
• •All bedroom doors opening onto the landing/escape staircase — FD30S required
• •Bathroom/WC doors onto the landing — not typically fire doors (bathrooms are low-risk rooms), though some councils specify them
• •Any door to a storage cupboard on the escape staircase — should be fire door

• *Third floor (in a three-storey HMO)*:
• •All bedroom doors onto the second-floor landing and staircase — FD30S required

• *Door to basement (where occupied)*:
• •FD30S required at the basement-to-ground-floor stair connection

**Summary — doors typically requiring FD30S in a London terraced HMO**:

| Door location | FD30S required? | |---|---| | All bedroom doors opening onto escape route (staircase/landing) | Yes | | Kitchen door opening onto escape route | Yes | | Living room door opening onto escape route | Often yes — confirm with FRA | | Bathroom/WC doors onto landing | Often not required (low risk) | | Cupboard doors on escape staircase | Yes | | Door to basement stair | Yes | | Front entrance door | Not typically (opens to outside) |

A formal Fire Risk Assessment (FRA) for the specific HMO, carried out by a competent fire risk assessor, will specify precisely which doors are required and to what standard.

**What makes a compliant HMO fire door installation?**

A fire door is a 'system' — it is not just the door leaf. The complete fire door assembly must be compliant, not just the leaf. The key components are:

*1. Fire door leaf*: The door leaf (the panel itself) must be a tested and certified FD30 or FD30S fire door — not a standard solid-core door. Certified fire door leaves are marked (typically on the top edge of the door leaf with a 'plug' — a coloured plug visible only to the installer at hinge side — or with a certification label). Common certified fire door suppliers used in London HMOs include Vicaima, Premdor, XL Joinery (Mendes), and others.

Minimum door leaf thickness: 44mm for FD30 (standard). Standard solid interior doors are typically 35–40mm — these are NOT fire doors even if they appear similar.

*2. Fire door frame*: The frame must also be part of the tested system. A certified fire door leaf fitted into a standard softwood frame may not provide 30 minutes' fire resistance — the frame is part of the tested assembly. New fire door installations in HMOs should use frames that are part of the tested system, or that are confirmed as compatible by the door manufacturer.

For replacement fire doors in existing frames (common in refurbishments): the existing frame must be assessed for compatibility with the new fire door leaf — if the frame is damaged, poorly installed, or not sufficiently robust, it must be replaced.

*3. Intumescent seals and smoke brushes*:

• The intumescent strip seals the gap between the door leaf and the frame in a fire by expanding to fill the gap as the temperature rises. For FD30S:
• •Intumescent strip: must be correctly specified (typically 10mm × 4mm intumescent strip fitted into a groove rebated into the door stop or door edge)
• •Cold smoke brush seal: thin brush seal that maintains contact with the door surface at low temperatures, blocking cold smoke
• •Where the intumescent seal is fitted into the door leaf edge (rather than the door stop), the brush seal must be on the opposite surface (the door stop) — check the manufacturer's specification carefully
• •The gap between door leaf and frame/floor must not exceed the tested specification (typically 3mm at sides and top; 8mm maximum at the bottom to the floor, or a bottom seal must be fitted)

*4. Self-closing device (door closer)*:

• All fire doors in HMOs must be self-closing — they must automatically close and latch after every use. A self-closing device (overhead door closer — typically a surface-mounted or concealed overhead closer) must be fitted to every fire door. The door closer must:
• •Be strong enough to close and latch the door from any angle (including from 5° open)
• •Not be defeated by a door stop wedge (door wedges are a fire safety hazard in HMOs — inspectors will remove them)

Common overhead closers used in London HMO refurbishments: Dorma TS 68, Briton 2003, and equivalent. The force of the closer must balance with the ease of opening — heavy closers on doors used by elderly or disabled occupants may not be appropriate.

*5. Fire door hinges*:

A minimum of three hinges is required on all fire doors (two hinges create insufficient resistance to the door twisting in a fire). The hinges must be suited to a fire door installation — most standard flush hinges are acceptable for FD30, but confirm with the door manufacturer. Ball-bearing hinges are recommended for ease of use and long-term reliability.

*6. Intumescent pad around the lock case*:

Where a lock case is installed in the door edge, an intumescent pad (fire-rated material surrounding the lock case within the door) must be fitted to prevent the metal lock case from conducting heat through the door and creating a failure point. Certified fire doors are typically supplied with intumescent pads pre-fitted around the lock case.

**Common fire door failures identified in London HMO inspections**:

Council housing inspectors and fire risk assessors in London identify the following fire door failures most frequently:

1. *Non-fire-rated door leaves*: Standard solid-core or hollow-core doors installed where FD30S is required — the most common failure, particularly in older HMOs converted before fire door requirements were well understood

2. *Missing or damaged intumescent seals*: Intumescent strips that have been painted over (paint filled the expansion groove, preventing activation), have shrunk or dried out, or were never fitted

3. *Missing cold smoke brushes*: FD30 doors without the 'S' specification (no smoke seals) used where FD30S is required

4. *Self-closer not fitted or not working*: Fire doors without a self-closing device, or with a closer that is too weak to reliably close and latch the door from all angles

5. *Door held open with a wedge*: Fire doors wedged open (typically for ventilation or convenience) — this is a statutory breach in an HMO and inspectors will issue immediate enforcement notices

6. *Gaps exceeding specification*: Gaps at the bottom of the door (more than 8mm), at the sides (more than 3mm), or at the top (more than 3mm) — these gaps allow smoke to penetrate even with intumescent seals fitted

7. *Frame not fire-rated or poorly fitted*: The frame has gaps at the wall, is not securely fixed, or is not compatible with the fire door leaf

8. *Hinges — only two fitted*: Only two hinges on a fire door (minimum three required)

**Cost of fire door installation in a London HMO (2025)**:

| Item | Cost per door (fitted, incl. materials) | |---|---| | FD30S fire door and frame (supply and fit) | £300 – £550 | | FD30S fire door only (into existing frame where compatible) | £200 – £350 | | Door closer supply and fit | £80 – £150 | | Intumescent seal and cold smoke brush retrospective fitting | £60 – £120 | | Full fire door audit and survey | £200 – £400 per property |

For a typical 4-bedroom terraced HMO in London requiring 5–6 new fire door assemblies (3 bedroom doors, 1 kitchen door, 1 living room door, 1 storage cupboard), the fire door component of a refurbishment typically costs £1,800–£4,000 in materials and labour.

**The Fire Risk Assessment (FRA) for HMOs**:

Under the Regulatory Reform (Fire Safety) Order 2005 (the 'Fire Safety Order'), all HMOs (and all common areas of residential buildings) must have a fire risk assessment carried out by a 'responsible person' — typically the landlord or managing agent. For licensed HMOs, the FRA is a condition of the HMO licence.

• The FRA must:
• •Identify fire hazards in the property
• •Identify people at risk (occupants, particularly those who may be unable to self-evacuate)
• •Assess the risk of fire occurring and the risk to occupants if fire does occur
• •Specify fire safety measures required (fire doors, smoke alarms, fire extinguishers, emergency lighting, escape routes)
• •Record the findings
• •Be reviewed at intervals (typically annually, or whenever the risk profile changes — e.g., new occupant with mobility issues, layout change)

The FRA is the document that specifies which doors must be fire doors, to what standard, and any other fire safety measures required. A professional fire risk assessor (FRACS-qualified or equivalent) should carry out the FRA for all licensed HMOs.

**HMO licensing and fire door requirements**:

In London, mandatory HMO licensing applies to all HMOs occupied by 5 or more people from 2 or more households. Additional licensing (adopted by individual boroughs) extends licensing to smaller HMOs (typically 3 or more occupants from 2 or more households) in many London boroughs.

• The HMO licence conditions include fire safety requirements that typically specify:
• •Adequate fire detection (linked smoke alarms at each floor level and heat detector in kitchen)
• •Fire doors meeting FD30S specification on all escape route openings
• •Self-closing devices on all fire doors
• •Means of escape (clear, unobstructed escape routes)
• •Emergency lighting where applicable

Landlords who fail to install compliant fire doors are in breach of their licence conditions and subject to improvement notices, licence refusal, or civil penalties.

**London council inspection process for HMO fire doors**:

London borough housing inspectors (Private Sector Housing Enforcement teams) inspect licensed HMOs at initial licensing and periodically during the licence period. They use the Housing Health and Safety Rating System (HHSRS) to assess fire safety hazards, and the specific fire safety requirements attached to the HMO licence.

*What inspectors physically check on fire doors*: 1. Certification mark — the coloured plug on the top edge of the door leaf (or certification label inside the door) 2. Door leaf thickness — measuring to confirm 44mm minimum 3. Intumescent seals — checking they are present, undamaged, and not painted over 4. Cold smoke brushes — checking they are present and in contact with the door surface 5. Self-closing device — testing that the door closes and latches from every angle (including from barely open) 6. Gap checks — using a 3mm gauge card to check clearance at sides and top; checking the bottom gap 7. Number of hinges — confirming three minimum 8. Frame condition — checking the frame is secure and undamaged 9. Door not held open — checking for wedges, hooks, or other devices holding the door open

• *Enforcement powers*:
• •Improvement Notice (Section 11, Housing Act 2004): requires remediation within a specified timeframe (typically 28 days for fire safety failures, sometimes shorter for serious failures)
• •Civil Penalties: up to £30,000 per breach for failing to licence or for serious fire safety failures
• •Emergency Remedial Action: where the fire safety failure presents an imminent risk, the council can carry out works and charge the cost to the landlord
• •Prosecution: for serious or repeated failures, landlords can be prosecuted under the Housing Act 2004 or the Fire Safety Order

**Practical guidance for London HMO landlords**:

1. Commission a professional FRA before any HMO licence application or renewal — the FRA specifies what is required 2. Use a competent contractor with HMO fire safety experience to install fire doors — specify FD30S (not just FD30) for all escape route doors 3. Keep certification records for all fire doors installed (manufacturer's technical data sheet, delivery note, installer's records) — these are requested by inspectors and may be needed to demonstrate compliance 4. Inspect all fire doors annually as part of the FRA review — check self-closers are working, seals are undamaged, gaps are within specification 5. Never tolerate door wedges in the property — address this with occupants as a tenancy agreement condition and during routine inspections