Fire Door Intumescent Strip Regulations UK: Does a Fire Door Need Them?

Why are intumescent strips important for fire safety on fire doors?

Intumescent strips on fire doors are incredibly important for fire safety because of the role they play in preventing the passage of fire and smoke, sealing gaps around fire doors and frames. This ensures they meet FD30 and FD60 regulations and effectively keep occupants safe in the event of a fire. Having correctly installed intumescent strips fitted on fire doors ensures peace of mind, compliance, and safety.

Are intumescent strips required on fire doors in the UK

Yes, UK building regulations require fire doors to be fitted with intumescent strips to meet fire safety regulations. They are incredibly important to maintain the integrity of fire doors, sealing gaps around the door to prevent the passage of fire and smoke. Most FD30 and FD60 fire doors require intumescent strips to ensure the door meets its fire-resistant rating and is fully compliant.

Intumescent strips vs smoke seals

Smoke seals help to block smoke before a fire develops, whereas intumescent strips expand during a fire. While they are both designed to help protect and keep occupants safe, they differ in their function and the conditions in which they operate. Both are often combined for comprehensive fire and smoke protection.

Intumescent strips:

• Are fitted to the edge of fire doors or frames, where the door leaf meets the frame
• Activate when exposed to heat during a fire
• Expand to seal gaps, helping to block fire and smoke to protect occupants

Smoke seals:

• Are fitted to the edges of fire doors or frames, often alongside intumescent strips
• Are effective at normal temperatures before a fire develops
• Block cold smoke, slowing the spread and preventing smoke inhalation

Examples of when missing strips can lead to fire door failure

Failing to fit intumescent strips on fire doors can lead to doors failing fire tests, as well as legal and insurance implications under UK fire safety regulations. Without intumescent strips blocking fire, it means smoke and flames can pass through the gaps around the door leaf and frame, causing smoke inhalation and damage to the building. A lack of intumescent strips can invalidate the door’s certification, causing legal and insurance repercussions. A fire door needs to have all components correctly installed and put in place to meet UK fire door regulations and be fully certified.

Next steps for fire door compliance

Now that you’re aware of the important role intumescent strips play in fire safety, the next steps are to ensure your fire doors are correctly fitted with compliant hardware. At IronmongeryDirect, we supply fire-rated door hardware designed to meet UK building regulations and recognised fire door standards. To help maintain certification and maximise safety, we offer a range of durable intumescent strips suitable for FD30 and FD60 fire doors.

FAQs

Do fire doors have to have intumescent strips?

Yes, most fire doors must have intumescent strips to ensure they meet UK fire door regulations, remain certified, and maintain compliance. Both people and property are likely to be put at risk if intumescent strips are not fitted to fire doors.

What are the requirements for an FD30 fire door?

FD30 fire doors are designed to resist fire for at least 30 minutes. They must be certified as FD30 and be used with compatible fire-rated frames, hinges, and hardware. These doors are usually 44mm thick, with intumescent seals fitted around the edges and, in most cases, a self-closing device is also required.

Do I need 30 minute or 60 minute fire doors?

Your location will influence what fire door you need. Most residential properties require FD30 fire doors, which are designed to resist fire for at least 30 minutes. FD60 fire doors are rated for 60 minutes, and are more commonly needed in larger buildings, commercial spaces, or high-risk areas. If you’re unsure, consult a fire safety professional to confirm the necessary rating for your property.

Can you paint a fire-rated door?

Yes, you can paint a fire-rated door. Regular paint can usually be used to create the desired aesthetics in your space without compromising compliance. Ensure the fire door does not become any thicker than its certified specification as paint build-up can compromise its fire rating and performance.

What is the difference between FD30 and FD60 fire doors?

FD30 fire doors resist fire for 30 minutes, whereas FD60 fire doors resist fire for 60 minutes. The difference lies in the duration of fire resistance provided. FD30 fire doors are usually 44mm thick and better suited to lower-risk spaces, such as small residential buildings. FD60 fire doors are typically thicker (54mm) and a suitable option for large commercial buildings, where higher levels of fire protection are likely to be needed.