Fire Rated Door Types: Wood, MDF & Hollow Metal for Every Application

Direct answer: Fire rated doors come in three primary types: wood-core, MDF-core, and hollow metal. Each suits different applications and fire rating requirements (20-min, 45-min, 90-min, 3-hour).

Fire Rated Door Types: A Contractor Specification Guide

Selecting the wrong fire door type is a code compliance failure. This guide covers every type available at wholesale pricing from WholesaleDoorHub.

Type 1: Wood-Core Fire Rated Doors

Wood-core fire doors use a mineral-filled or intumescent core within a wood face. They look identical to standard interior doors and are the most common choice for residential and light commercial projects.

Wholesale pricing: $185-$480 per unit depending on rating and size.

Type 2: MDF-Core Fire Rated Doors

MDF-core fire doors offer a consistent, paintable surface with excellent dimensional stability. Preferred for multifamily residential projects where appearance matters.

• Smooth face accepts paint without grain telegraphing
• Available in Shaker, flush, and 6-panel profiles
• UL-listed assemblies for 20-min and 45-min ratings
• Wholesale pricing: $165-$395 per unit

Type 3: Hollow Metal Fire Rated Doors

Hollow metal (HM) doors are the standard for commercial, industrial, and high-rise applications.

Wholesale pricing: $220-$680 per unit (door only, frame separate).

Comparing Fire Door Types Side by Side

Which Fire Door Type to Specify

For attached garages (IRC R302.5): 20-min solid-core wood or MDF door. Most common residential fire door application.

For multifamily corridor doors (IBC 1020.2): 20-min rated assembly with self-closing hardware. Wood-core or MDF-core both acceptable.

For stairwell enclosures (IBC 1023.8): 45-min rated assembly. Verify with local AHJ.

For commercial exit enclosures (IBC 1022.2): 90-min rated assembly. Hollow metal is the standard specification.

Contractor Takeaway

Match the fire door type to the occupancy and rating requirement before ordering. WholesaleDoorHub stocks 20-min and 45-min wood-core and MDF-core fire doors for immediate shipment. Submit a quote request with your project specs and we will confirm UL listing numbers within 48 hours. No minimum order on in-stock items.

Frequently Asked Questions

Q: Do fire rated doors need special frames?

A: Yes. A fire door assembly includes both the door and the frame. The frame must be rated to match the door. WholesaleDoorHub supplies complete assemblies.

Q: Can I paint a fire rated door?

A: Yes, with water-based latex paint. Do not use oil-based paint or apply more than two coats, as excessive paint can compromise the intumescent seal.

Q: Are hollow metal doors required for commercial projects?

A: Not always. Many commercial projects use wood-core or MDF-core fire doors in offices and corridors. Hollow metal is required for high-rise and industrial applications.

Q: What is the difference between a fire door and a smoke door?

A: A fire door resists flame and heat. A smoke door resists smoke passage. Many fire doors also serve as smoke doors, but not all smoke doors are fire rated.