Last Updated on 19 March 2025 by Tia Ellahi
Fire Doors: How are they different from normal doors?
Fire doors are specially designed with fire-resistant materials, intumescent seals, and self-closing mechanisms to slow the spread of fire and smoke, unlike normal doors which offer no fire protection.
When it comes to fire safety, fire doors are one of the most critical components of any home or building. They help prevent the spread of flames and smoke, giving occupants more time to escape. But with different types, ratings, and legal requirements, choosing the right fire door can be confusing.
In this guide, we’ll cover everything you need to know—from internal fire doors to external fire doors, fire doors with glass, and the importance of fire door certification.
What You’ll Learn in This Guide..
- What is a Fire Door & How Does It Work?
- Fire Door Ratings: FD30 vs. FD30S Explained
- Where Fire Doors Are Required in the UK
- Fire Door Certification & Legal Requirements
- Types of Fire Doors: Internal, External & Glazed
- Common Myths About Fire Doors
- FAQs
What is a Fire Door & How Does It Work?
A fire door is specifically designed to slow down the spread of fire and smoke, giving people more time to evacuate. Unlike standard doors, fireproof doors are built from fire-resistant materials such as solid timber or composite, and they include:
- Intumescent seals – These expand in extreme heat, sealing gaps around the door to block fire and smoke.
- Fire-rated hinges and closers – Ensuring the door functions correctly.
- Heavy-duty cores – Made from specialist materials to withstand heat for a specified period.
There are different types of fire doors internal and external fire doors, and each comes with a fire door certification that guarantees its fire resistance.
Fire Door Ratings: FD30 vs. FD30S Explained
Fire doors are classified based on how long they can resist fire and smoke. The two most common ratings are:
- FD30 Fire Door – Resists fire for 30 minutes.
- FD30S Fire Door – Also provides 30 minutes of fire resistance but includes smoke seals to stop smoke from spreading.
Larger buildings or commercial properties might require FD60 fire doors (60 minutes) or higher ratings. Most internal fire doors in UK homes are FD30 rated, while external fire doors or apartment entry doors might need FD30S.
Where Are Fire Doors Required in the UK?
Not every door in a home has to be a fireproof door, but building regulations require them in specific areas:
- Between an integral garage and the house
- Between a loft conversion and the main house
- In houses with three or more storeys, including stairwells
- In flats and apartment buildings, where entrance doors must be FD30S fire doors
If you’re unsure whether you need fire doors internal or external fire doors, check Approved Document B of UK building regulations.
Fire Door Certification & Legal Requirements
All fire doors for sale in the UK must meet strict safety standards. Fire door certification ensures the door has been tested to withstand fire for a specific period. The main standards to look for are:
📌 BS 476-22 – The British Standard for fire door testing
📌 BS EN 1634 – The European fire resistance test for fire doors
Certified fire doors will have a fire door label or plug that confirms compliance. For landlords and property owners, failing to meet fire door requirements can result in legal action.
Types of Fire Doors: Internal, External & Glazed
Fire doors come in various styles to suit different needs and aesthetics. Whether you need a fireproof door for safety or want a modern design with glazing, there are multiple options:
1. Internal Fire Doors
Internal fire doors are used inside homes and buildings to contain fire within certain areas. They come in different styles and materials, including solid timber, composite, and steel.
2. External Fire Doors
External fire doors provide fire resistance at exit points. These are commonly used in commercial buildings, but some homes also require them—especially in garage-to-house access points.
3. Fire Doors with Glass example
Want to balance safety with aesthetics? Fire doors with glass feature fire-resistant glazing, allowing more light while maintaining fire protection.
4. Glazed Fire Doors Example
Similar to fire doors with glass, glazed fire doors use high-performance fire-rated glass, ensuring both visibility and safety.
5. Internal Fire Doors with Glass example
For modern interiors, internal fire doors with glass offer fire resistance without compromising on design. These are perfect for maintaining an open-plan feel while meeting fire safety regulations.
If you’re looking for fire doors for sale, always check that they meet official fire door certification requirements.
Common Myths About Fire Doors
- “A fire door is just a regular door, but thicker.”
No! Fireproof doors are built with specialist cores, seals, and hardware to withstand heat. - “You don’t need fire doors in residential homes.”
If you have a loft conversion, integral garage, or a three-storey home, you likely need internal fire doors. - “Fire doors don’t need regular maintenance.”
They do! Check for gaps, damaged seals, or faulty self-closing mechanisms.
Understand Everything There is to Know About Fire Doors with GFD Homes
Fire doors aren’t just a legal requirement—they’re a crucial safeguard for your home and loved ones. Whether you need composite internal fire doors, fire doors with glass, or FD30S fire doors, making an informed choice ensures your property meets safety standards and provides essential protection in an emergency.
By understanding fire door certification, fire door requirements, and where these doors are necessary, you can confidently upgrade your home with compliant, high-quality fire doors.
At GFD Homes, we offer a range of certified fire doors for sale, designed to enhance safety without compromising on style. If you’re ready to upgrade, get a quote today or call our team on 01642 309576 for expert advice.
FAQs about Fire Doors
Can You Paint Fire Doors?
Yes, but you must use fire-resistant paint and avoid painting over seals or intumescent strips.
Do I Need Fire Doors in My House (UK)?
If your home has three or more storeys, a loft conversion, or an internal garage, you’ll likely need fire doors for internal use.
Do Fire Doors Need to Be Self-Closing?
Yes! Fire doors must automatically close to prevent fire and smoke from spreading.
Who is Responsible for Fire Doors in Flats?
Landlords and building owners must ensure all internal fire doors in communal areas meet legal standards.
Unlock even more knowledge with these reads..
- Everything You Need to Know About Part Q Building Regs
- Listed Building Consent: A comprehensive guide
- Composite Front Doors: Because your home deserves a red carpet moment
- Trade Fire Doors: looking for trade prices? Visit our trade site, The Trade Village.
