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Your opening, frame and swing all matter. Gather the measurements, then confirm the exact model before you order.
Masonite
Masonite Traditional 36-in x 84-in Natural 4-Panel Unfinished Knotty Alder Wood Single Barn Door
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SKU 857770
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What to measure before ordering
- Identify what you are replacing.
A slab is the door panel. A prehung unit includes a frame. Record whether you need a slab or a complete unit, and check exactly what the selected product includes.
- Measure the opening and the frame.
Record the width and height in several places, plus the wall or jamb depth. Keep rough-opening measurements separate from the existing door's dimensions. Include the units with every measurement.
- Confirm the swing and the exact model.
Note which side the hinges sit on, the side you are viewing from, and whether the door swings toward or away from you. Confirm handing terminology and required clearances against the manufacturer's documentation for the selected SKU.
These notes are a planning aid. Product names, photos and shared descriptions do not confirm fit. Check the selected SKU, manufacturer specifications and installer measurements before ordering.
Ask the Super Arbor teamProduct details
Catalog information may describe more than one option. Confirm the specifications for your selected SKU; the store's current shipping, returns and order terms apply.
36x84 Unfinished Knotty Alder 4-Panel Barn Door
Bring warm, natural character to your space with this Masonite Traditional barn door. Crafted from solid-core knotty alder, the unfinished slab is ready to stain and sized for 36-in x 84-in openings, delivering authentic wood texture and a classic 4-panel look. Ideal for closets, pantries, offices, and more; hardware sold separately.
Key Features:
- Solid Wood Authenticity: Solid-core knotty alder construction provides durability and rich, natural character
- Ready to Finish: Unfinished, natural surface accepts stain for a custom look
- Classic 4-Panel Design: Traditional style adds symmetry and warmth to interiors
- Sized for 36-in Openings: Actual 36-in W x 84-in H x 1-3/8-in thick slab; single-door configuration
- Trim Allowance Guidance: Up to 2 in height (bottom only) and 1/2 in width total; trimming beyond voids warranty
Specifications Table:
| Specification | Details |
|---|---|
| Series Name | Traditional |
| Color/Finish Family | Brown |
| Manufacturer Color/Finish | Natural |
| Door Finish | Unfinished |
| Actual Height (Inches) | 84 |
| Actual Width (Inches) | 36 |
| Common Size (W x H) | 36-in x 84-in |
| Door Thickness (Inches) | 1.375 |
| Configuration | Single |
| Bypass | Yes |
| Core Type | Solid core |
| Door Surface | Smooth |
| Glass Tint | None |
| Handing | Universal |
| Hardware Included | No |
| Material | Wood |
| Panel Type | 4-panel |
| Soft Close | No |
| Warranty | 1-year limited |
| Wood Species | Knotty alder |
| Assembly Required | No |
| Finish or Rough Opening Height (Inches) | 80.0 |
| Finish or Rough Opening Width (Inches) | 32.0 |
| Trimming Allowance | Height: up to 2 in (bottom only); Width: up to 1/2 in total (1/4 in per side) |
| CA Residents: Prop 65 Warning(s) | Yes |
| UNSPSC | 30171500 |
Frequently Asked Questions (FAQ):
Q: Is hardware included?
A: No. This listing is for the door slab only; track and hardware are sold separately.
Q: Can the door be trimmed to fit?
A: Limited trimming is allowed: up to 2 inches from the bottom only for height, and up to 1/2 inch total from the sides. Trimming beyond this voids the warranty.
Q: What openings will this door cover?
A: A 36-in-wide door typically covers a 30.5–32.5-in opening depending on casing; see measuring guide.
Q: What is the material and finish?
A: Solid-core wood, knotty alder species, delivered unfinished in a natural tone and ready to stain.
Q: Is the door handed?
A: Universal handing; can be installed for left- or right-sliding applications.
Rustic Warmth, Tailored to Your Palette
This barn door ushers in organic elegance with the soulful knots of alder and the quiet geometry of its four-panel layout. I love how the unfinished surface invites your personal touch—stain it honeyed for farmhouse charm or deepen it for a moody, modern moment. Float it across a bathroom or pantry to carve space with sculptural simplicity. It’s a timeless layer of texture that instantly elevates everyday living.
Customize your space with the natural beauty of solid alder—add this Masonite barn door to your cart and finish it your way.