OrePac Fir Interior Wood Doors Review: 12 Width Options Meet Montana's Building Demands

OrePac’s Douglas Fir interior doors come in 12 standard widths from 1’0” to 3’0” in 2-inch increments, with heights of 6’8”, 7’0”, and 8’0”. That comprehensive size range means contractors can stock what they need without custom-ordering every odd opening.

These doors feature vertical grain Douglas Fir construction with solid wood cores — not the hollow-core junk that sounds like cardboard when you knock on it. Douglas Fir outperforms both hemlock and pine for interior doors. It’s harder than pine with fewer knots and better warp resistance. That matters when Montana’s dry winters and humid springs put wood through its paces.

Construction Details That Actually Matter

The stile and rail construction uses 4-7/16” stiles with a beefier 9-1/8” bottom rail. That wider bottom rail prevents sagging over time — especially important on the taller 7’0” and 8’0” doors where weight becomes a factor.

Specification	Value
Wood Species	Clear Douglas Fir
Construction	Stile and Rail with Solid Wood Core
Thickness	1-3/8” (Standard Interior)
Stile Width	4-7/16”
Top Rail	4-7/16”
Bottom Rail	9-1/8”

OrePac offers six different panel configurations across their line:

• Model 82: 2-panel flat (Shaker style)
• Model 33: 3-panel flat (Craftsman style)
• Model 55: 5-panel flat (classic Shaker, with 6 panels on 8’0” doors)
• Model 82A: 2-panel raised
• Model 44: 4-panel raised
• Model 66: 6-panel raised (traditional colonial)

Installation Requirements and Reality Checks

These doors ship unfinished and must be sealed on all 6 sides immediately after fitting. Not next week. Not when you get around to it. Immediately. Skip this step and the warranty’s void. Montana’s humidity swings will warp an unsealed door faster than you can say “callback.”

Standard 6’8” doors need three hinges minimum. The 8’0” doors require four. Don’t try to save twelve bucks by using three hinges on a tall door — that’s how you get sagging and binding after the first winter.

The doors work with standard locksets and come compatible with both 4-9/16” jambs (for 2x4 walls) and 6-9/16” jambs (for 2x6 walls). They’ll handle single-swing, double-swing, or sliding pocket configurations.

Who Should Buy These Doors

The solid core construction delivers genuine sound reduction — crucial for bedrooms, offices, and bathrooms where privacy matters. These aren’t budget doors. They’re for contractors who understand that Douglas Fir’s superior grain and durability justify the upfront cost.

Customers report these doors “take stain well” and feel “solid”. Some quality control issues pop up — splinters and gaps — plus longer lead times on custom sizes. That’s the trade-off with real wood versus molded composites.

The doors meet CARB Phase 2 compliance for formaldehyde emissions, with FSC/SFI certified variants available for clients who care about that sort of thing.

For Montana’s extreme temperature swings between -20°F winters and 85°F summers, Douglas Fir’s vertical grain stability beats pine hands down. The wood won’t cup and twist like lesser species when your client cranks the heat in January then opens every window in July.

Frequently Asked Questions

Q: What sizes do OrePac Douglas Fir interior doors come in?

OrePac Fir interior doors come in 12 standard widths from 1’0” to 3’0” in 2-inch increments, with heights of 6’8”, 7’0”, and 8’0”. Custom sizes are available but expect longer lead times than stock dimensions.

Q: Do these doors require any special finishing?

OrePac Douglas Fir doors arrive unfinished and must be sealed on all 6 sides (including top and bottom edges) immediately after fitting. Skip this step and OrePac’s 5-year limited interior warranty becomes void — the unsealed wood will warp from humidity changes.

Q: What’s the difference between the flat and raised panel models?

OrePac offers three flat panel models (82, 33, and 55) in Shaker and Craftsman styles, and three raised panel models (82A, 44, and 66) for traditional looks. All models use the same solid wood core construction with 1-3/8” thickness and 4-7/16” stiles.

Q: How many hinges do these doors need?

Standard 6’8” OrePac doors require three hinges minimum, while their 8’0” doors need four hinges to prevent sagging. The doors use standard hinges and work with both 4-9/16” jambs for 2x4 walls and 6-9/16” jambs for 2x6 walls.

Q: Why choose Douglas Fir over pine or hemlock interior doors?

Douglas Fir is harder than pine with fewer knots and better warp resistance — crucial for Montana’s extreme humidity swings. OrePac’s vertical grain Douglas Fir construction provides more stability than hemlock and delivers genuine sound reduction thanks to the solid wood core.

Q: What panel configurations does OrePac offer?

OrePac manufactures six configurations: Model 82 (2-panel flat Shaker), Model 33 (3-panel flat Craftsman), Model 55 (5-panel flat classic Shaker, 6 panels on 8’0” doors), Model 82A (2-panel raised), Model 44 (4-panel raised), and Model 66 (6-panel raised colonial).