OrePac Knotty Alder 82 Raised Interior Wood Door

The OrePac Knotty Alder 82 delivers solid core sound dampening and engineered stability that hollow core doors can’t match. This 1-3/8 inch thick door features engineered stiles and rails with a solid finger-jointed wood core beneath 1/8 inch knotty alder veneer. For Montana contractors dealing with extreme humidity swings between bone-dry winters and summer construction season, the engineered construction matters more than the rustic aesthetics.

Why Solid Core Construction Earns Its Premium

Solid core construction provides better sound dampening and a weightier feel compared to hollow core doors. That weight isn’t just about perceived quality — it’s functional mass that blocks sound transmission between rooms. In Montana homes where the furnace runs constantly from October through April, that extra sound dampening between bedrooms and mechanical rooms pays dividends.

The solid finger-jointed wood core provides consistent density throughout the door. No hollow spots. No cardboard honeycomb that crushes when you bore for hardware. The engineered stiles and rails minimize warping and seasonal movement — critical when Montana’s indoor humidity drops below 20% in January then climbs above 50% during summer.

Specification	Value
Door Thickness	1-3/8 inches
Core Type	Solid finger-jointed wood
Veneer Thickness	1/8 inch (3.2 mm)
Panel Design	2-panel square top, raised panel style
Sticking Profile	Ovolo (rounded)
Surface Finish	Factory sanded, unfinished

Installation Requirements That Prevent Callbacks

Acclimation demands 48-72 hours on-site before finishing. Use 3 hinges for 80” doors and 4 hinges for 96” doors. All 6 surfaces must be sealed immediately with compatible primer/stain and topcoat. Limited trimming is allowed — up to 1/2” on bottom and 1/8” on sides.

That acclimation period isn’t optional in Montana’s climate extremes. Skip it and watch the door twist after the first heating season. The six-surface sealing requirement catches DIYers who only finish the visible faces. Moisture infiltrates through unsealed edges, causing the veneer to lift and the core to swell.

Wood conditioner before staining ensures even absorption on knotty alder. Without it, the knots and surrounding wood absorb stain at different rates, creating a blotchy finish that screams amateur hour.

Hardware and Jamb Compatibility

The door accepts standard interior locksets with 2-3/8” or 2-3/4” backset and fits standard interior door jambs in knotty alder, pine, or primed MDF. Common trim pairings include rustic Craftsman or Ovolo casing profiles.

No special hardware requirements. No proprietary jamb systems. It drops into standard rough openings with standard components — exactly what contractors want for straightforward installations.

Available Sizes

Standard widths include 18”, 24”, 28”, 30”, 32”, and 36”. Heights come in 80” (6/8) and 96” (8/0). The 96-inch option serves Montana’s newer construction where 9-foot ceilings have become standard.

The Warranty Reality

The 5-year limited warranty covers manufacturing defects in materials and workmanship for interior applications. Requirements include proper finishing and sealing on all six sides immediately after delivery, site acclimation before hanging, and it’s non-transferable to subsequent homeowners. Natural variations in color/texture, improper storage or installation damage, and normal wear aren’t covered.

Standard warranty language. The immediate sealing requirement means contractors can’t let these doors sit in the garage for two weeks while they frame. Plan accordingly.

Frequently Asked Questions

What makes this door different from the 82V model? The 82V includes a V-groove detail on the raised panels for a more pronounced rustic/plank look. Same solid core construction, just additional visual texture.

Can I get this door pre-hung? Pre-hanging service is available as an optional add-on, including jambs, hinges, and bore for handle. Saves field time but adds cost.

How much can I safely trim this door? Limited trimming is allowed — up to 1/2” on bottom and 1/8” on sides to maintain structural integrity. Exceed those limits and you’ll void the warranty and potentially expose the core.

Does it meet fire rating requirements? Fire-rated versions are available as special order, typically with 20-minute fire rating. Standard doors carry no fire rating.

What’s the VOC situation? The door is CARB Phase 2 compliant for low formaldehyde emissions. Meets current indoor air quality standards.