18″ Knotted Pine 2 Panel Single Interior Slab Door

Add natural warmth and rustic charm to your home with the 18″ Knotted Pine 2 Panel Interior Slab Door from Builders Surplus. This solid pine interior door showcases the distinctive knotty grain pattern, delivering authentic character that no manufactured door can replicate.

The classic two-panel design suits a wide range of interior styles — from farmhouse and rustic cabin to craftsman and traditional aesthetics. At 18 inches wide, it’s perfectly sized for narrow closets, laundry alcoves, and utility spaces where a standard-width door won’t fit.

Sold as an unfinished slab door, this pine door allows you to customize the finish — paint it to match your trim, apply a clear coat to show off the natural grain, or use a rich stain for deeper warmth. Accepts standard door hardware and fits most existing frames.

Key Features:

• Material: Solid knotted pine wood
• Style: 2-panel design
• Configuration: Slab only (frame, hinges & hardware not included)
• Finish: Unfinished — paint or stain ready
• Use: Interior (closets, bedrooms, utility rooms)
• Width: 18 inches

Available in-store at Builders Surplus in Louisville and Florence, KY. Browse our full selection of knotted pine interior doors in slab and prehung configurations.