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Architectural Element

What is Slab Door?

A slab door is a flat, single-piece door without raised or recessed panels, molding, or glass inserts. Its smooth, uninterrupted surface creates a clean, modern look and serves as the standard door type in contemporary, minimalist, and mid-century modern design.

Understanding Slab Door

Slab doors (also called flat-panel doors or flush doors) feature a completely smooth, flat surface on both sides. They are constructed in two main ways: solid-core slab doors have a particle board, MDF, or solid wood interior that provides weight, soundproofing, and durability; hollow-core slab doors have a cardboard honeycomb interior between thin veneers, making them lightweight and affordable but less sound-resistant. Solid wood slab doors — crafted from walnut, oak, maple, or other hardwoods — showcase beautiful natural grain patterns across the uninterrupted surface, making them a premium choice for modern homes. Slab doors became prominent in mid-century modern architecture of the 1950s and 1960s, where clean lines and minimalism were paramount, and they have remained a staple of modern design ever since.

Slab Door in Interior Design

Slab doors are the go-to choice for modern, contemporary, minimalist, and mid-century interiors where clean lines define the aesthetic. Their smooth surface draws less visual attention than panel doors, allowing architectural details, artwork, and furniture to take center stage. In modern homes, slab doors are often paired with concealed hinges and minimal hardware — sometimes just a round or linear pull rather than a traditional lever handle. Floor-to-ceiling slab doors (8-10 feet) create a dramatic, hotel-like feel. Painted slab doors in bold colors can serve as accent features. Wood-veneer slab doors in walnut or white oak add warmth to otherwise minimal spaces. Slab doors also work well as barn-style sliding doors when mounted on exposed track hardware.

Key Characteristics

Completely flat, smooth surface without panels
Available in hollow-core and solid-core construction
Natural wood versions showcase grain patterns
Pairs with minimal hardware and concealed hinges
Standard in modern and mid-century design
Available as hinged, sliding, or pocket doors

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Frequently Asked Questions