OrePac Knotty Alder 82 Raised Interior Door

The OrePac Knotty Alder 82 is a solid core interior door featuring engineered stiles and rails with genuine knotty alder veneer over a solid finger-jointed wood core. At 1-3/8 inches thick with 1/8 inch veneer, it delivers better sound dampening than hollow core doors while the engineered construction minimizes the warping issues that plague solid wood. Available with a 5-year limited warranty when properly finished, this door targets contractors who need reliable interior door specs for bedrooms, bathrooms, and home offices.

The sound dampening matters. Solid core construction provides that weightier feel and acoustic performance hollow doors can’t match. For Montana homes where bedrooms share walls with living spaces or home offices need quiet, that solid core makes a measurable difference. The door ships unfinished, ready for site-specific staining or painting.

Construction and Specifications

The 2-panel square top design features raised panels with ovolo (rounded) sticking profiles. Standard dimensions run from 18 to 36 inches wide in 80-inch (6/8) and 96-inch (8/0) heights. That range covers most residential applications without custom ordering.

Specification	Value
Material	Knotty Alder
Core Construction	Solid finger-jointed wood
Door Thickness	1-3/8 inches
Veneer Thickness	1/8 inch (3.2 mm)
Panel Design	2-panel square top, raised
Sticking Profile	Ovolo (rounded)
Warranty	5-Year Limited (Interior)

The engineered stiles and rails address seasonal movement concerns. Montana’s humidity swings from bone dry in winter to moderate in summer — exactly the conditions that make solid wood doors stick, warp, or crack. The engineered construction stabilizes those natural wood tendencies while maintaining the authentic knotty alder appearance.

Installation Requirements

The 48-72 hour acclimation period isn’t optional — doors must adjust to site humidity before finishing. Montana’s low winter humidity makes this critical. Skip it and watch that warranty coverage disappear.

All six surfaces require immediate sealing with compatible primer/stain and topcoat. Not just the faces — the edges, top, and bottom too. Wood conditioner before staining ensures even absorption on knotty alder’s variable grain.

Trimming allowances stay conservative: up to 1/2 inch on the bottom, maximum 1/8 inch on sides. Exceed those limits and the structural integrity suffers. Use 3 hinges for 80-inch doors, 4 hinges for 96-inch doors. That extra hinge on tall doors prevents sagging.

Hardware Compatibility

Standard interior locksets with 2-3/8 or 2-3/4 inch backset fit without modification. The door works with standard interior door jambs in knotty alder, pine, or primed MDF. Rustic Craftsman or Ovolo casing profiles complement the raised panel aesthetic.

Real-World Performance

Customer reviews average approximately 4.5 out of 5 stars. Users praise the heavy, solid feel and high-quality wood texture, noting how well the natural knots take stain.

The complaints center on quality control variability — some doors arrive with “too many” knots while others have “too few.” Light sanding before finishing removes minor mill marks or handling scuffs. The unfinished wood demands immediate sealing to prevent warping.

Certifications and Compliance

CARB Phase 2 compliance ensures low formaldehyde emissions. Fire-rated versions available as special order, typically meeting 20-minute ratings. Ground truth documentation confirms 20-minute fire rating availability.

The Bottom Line

The OrePac Knotty Alder 82 delivers what contractors need: solid core sound dampening, engineered stability, and genuine wood aesthetics at interior door pricing. The warranty demands proper finishing and acclimation — follow those requirements or lose coverage.

For Montana applications, that acclimation period and immediate six-surface sealing become even more critical. Winter humidity drops below 20% indoors. Summer construction means doors arrive from humid warehouses into dry jobsites. Give them time to adjust.

Alternative species include Douglas Fir, Knotty Pine, or Primed MDF for different price points. The 782 offers a flat-panel shaker version for modern aesthetics. The 82V adds V-groove detailing while the 82A features arch-top panels.

This door works for contractors who understand that proper installation determines long-term performance. Rush the acclimation, skip the edge sealing, or exceed trimming limits — expect callbacks. Follow the specs and it performs as promised.

Frequently Asked Questions

How much can I trim off an OrePac Knotty Alder 82 door?

You can trim up to 1/2 inch from the bottom and maximum 1/8 inch from the sides to maintain structural integrity. Exceeding these limits voids warranty coverage and risks exposing the core material.

What’s the actual thickness of the veneer on these doors?

The veneer measures 1/8 inch (3.2 mm) thick. This provides enough material for light sanding during finishing while maintaining the authentic wood appearance.

Do these doors require any special finishing process?

Yes — use wood conditioner before staining knotty alder to ensure even absorption across the variable grain patterns. All six surfaces must be sealed immediately with compatible primer/stain and topcoat.

What hardware works with the OrePac 82?

Standard interior locksets with either 2-3/8 inch or 2-3/4 inch backset fit without modification. Install 3 hinges on 80-inch doors and 4 hinges on 96-inch doors.

How long should I let the door acclimate before installation?

Allow 48-72 hours for the door to acclimate to site humidity conditions prior to finishing. This prevents warping and maintains warranty coverage, especially important in Montana’s dry climate.