Clashed vs Un-Clashed Fire Doors

Clashed Edge Fire Doors

Definition:

• “Clashed edge” means an additional hardwood lipping (usually 6–10mm thick) is applied to the edges of the door, often with a rebated or stepped joint.
• These edges are usually glued and sometimes mechanically fixed.

Features:

• Common on veneered doors and doors requiring extra durability.
• Can improve the fire resistance if properly fitted with intumescent strips.
• Allows for trimming/tailoring the door size on site.
• Gives a more finished, traditional appearance.

Pros:

• More durable edges (resist damage in high-traffic areas).
• Better acoustic and smoke sealing when combined with rebated edges.
• Easier to repair or refinish damaged edges.

Cons:

• Slightly more expensive due to extra materials and labour.
• Can expand/contract slightly with humidity if not well sealed.

Railed Fire Doors (No Clashing)

Definition:

• Constructed with stiles and rails (like a frame), usually without an applied clashed edge.
• The door edge is either veneered or painted flush to the core.

Features:

• May use solid or engineered timber components for rails and stiles.
• Often found on flush doors or paint-grade doors.

Pros:

• Cleaner, more minimalist appearance.
• Usually cheaper and lighter.
• Suitable for mass production and standard-sized installations.

Cons:

• Edges are more prone to chipping/damage.
• Less flexible for trimming or modifying on site.
• Less robust for long-term use in high-traffic areas.

✅ Which is More Convenient?

It depends on use case:

🔧 Summary

• Clashed edge: More robust, durable, and customizable. Better for performance and longevity.
• Railed (no clashing): Simpler, cheaper, and lighter. Better for standard use or modern designs.

If you’re a door supplier or installer, clashed edges offer more versatility and long-term quality, especially for demanding environments.