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Make room for the right door.
Your opening, frame and swing all matter. Gather the measurements, then confirm the exact model before you order.
Masonite
Masonite Traditional 42-in x 84-in Natural Unfinished Knotty Alder Wood 3-Lite Clear Glass Single Barn Door (Slab Only)
$1,093.58 USD
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SKU 857723
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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.
Knotty Alder 42x84 Unfinished 3-Lite Glass Barn Door Slab
Bring warm, natural character to interiors with this Masonite Traditional barn door slab crafted from knotty alder. The 3-lite clear glass design brightens rooms while the solid-core construction adds authentic wood heft and durability; arrives unfinished and ready to stain.
Key Features:
- Ready to Finish: Natural unfinished knotty alder arrives ready for your custom stain.
- Bright 3-Lite Design: Clear full-lite glass panels let light pass between rooms.
- Solid-Core Build: Heavier, authentic wood feel for durability and sound reduction.
- Slab Only: Track, handle, and hardware sold separately for flexible installation.
- Trim Guidelines: Up to 2 in bottom, 1/2 in total width (1/4 in each side) within warranty.
Specifications Table:
| Specification | Details |
|---|---|
| Series Name | Traditional |
| Common Size (W x H) | 42-in x 84-in |
| Actual Width (Inches) | 42.0 |
| Actual Height (Inches) | 84.0 |
| Door Thickness (Inches) | 1.375 |
| Material | Wood |
| Wood Species | Knotty alder |
| Color/Finish Family | Brown |
| Manufacturer Color/Finish | Natural |
| Door Finish | Unfinished |
| Configuration | Single |
| Bypass | Yes |
| Core Type | Solid core |
| Door Surface | Smooth |
| Glass Style | Clear glass |
| Glass Shape | Full lite (3-lite design) |
| Glass Tint | None |
| Handing | Universal |
| Hardware Included | No |
| Soft Close | No |
| Assembly Required | No |
| Warranty | 1-year limited |
| CA Residents: Prop 65 Warning(s) | Yes |
| UNSPSC | 30171500 |
| Finish or Rough Opening Width (Inches) | 38.0 |
| Finish or Rough Opening Height (Inches) | 80.0 |
| Trimming Allowance | Height: up to 2 in (bottom rail only); Width: up to 1/2 in total (1/4 in each side) |
Frequently Asked Questions (FAQ):
Q: Does this include the track and handle?
A: No. This is a slab-only door; all barn door hardware is sold separately.
Q: Can I trim the door to fit?
A: Yes, within limits: up to 2 in from the bottom and 1/2 in total from the width (1/4 in each side). Trimming beyond this voids the warranty.
Q: What is the glass type and privacy level?
A: Clear glass with a low privacy rating (1 of 10), allowing maximum light transmission.
Q: Is the door prefinished?
A: No. It is natural unfinished knotty alder and is ready to stain.
Q: What openings will this cover?
A: A 42-in wide barn door typically covers a 36.5-in opening without casing, per Masonite measuring guide.
Sun-washed Simplicity with Tailored Warmth
This knotty alder barn door washes a room in natural light, its three clear lites creating rhythm and effortless flow. The organic knots and grain offer soulful texture against sleek, rectilinear lines. Stain it a honeyed caramel and pair with matte black hardware for a refined, modern-farmhouse statement. It’s an elevated essential that turns transitions into moments of quiet luxury.
Elevate your space with light and texture—add this Masonite 3-lite knotty alder barn door to your cart today.