Most people spend weeks choosing an exterior front door. The hardware, the stain, the arch or square top. And then they hang a hollow-core slab on every interior opening and call it done.
That choice is more noticeable than most homeowners realize. Exterior doors get scrutinized. Interior doors get lived with. They’re the thing you pass through forty times a day, and in a Spanish Colonial or hacienda-style home, a hollow-core door with a brushed-nickel lever handle reads as an afterthought. It breaks the continuity of everything else you’ve put into the space.
DeMejico has built Spanish and Mexican interior doors from solid knotty alder for over 33 years. This guide covers what makes them different, the styles available, and how to choose the right door for each opening in your home.
Why Interior Doors Matter in the Spanish Colonial Home
In a traditional Spanish or Mexican home, every surface carried intention. Carved wood, hand-forged iron, Talavera tile. Interior doors were not afterthoughts. They were part of the architecture. Many featured the same arched tops and panel layouts you’d see on exterior entries, just scaled for interior proportions.
The material was solid throughout. Spanish Colonial craftsmen did not have plywood or hollow-core filler. They used what was available: solid timber, shaped by hand, joined with mortise and tenon construction. The result was a door that held its shape across decades of seasonal movement, temperature change, and daily use.
That’s the standard we still build to. Not because it’s nostalgic, but because it’s correct.
The Material: Solid Knotty Alder
Every interior door we build starts with solid knotty alder. Not engineered wood. Not veneered MDF. Solid alder, cut and dried to the right moisture content before we touch it.
Knotty alder is a good fit for Spanish Colonial work for a specific reason. The knots are part of the look. In a Colonial home, visible knots read as character, not defect. The wood has a warm, reddish-brown undertone that takes stain well and deepens with age. When we apply a dark walnut or medium brown finish, the grain and knot patterns come forward and give each door its own face.
Alder is also dimensionally stable. That matters for interior doors because they live in conditioned space with changing humidity. A solid alder door is less likely to bind in summer or develop gaps in winter than doors made from cheaper material or composite cores.
The panels in our doors are solid pieces, not inset plywood. The moulding is built up from solid stock. What you see is what it’s made from, all the way through.
Arched vs. Square Top: Choosing the Right Silhouette
The most visible choice in a Spanish interior door is the top. Arched or square. Both have their place, but they communicate different things.
Arched tops carry more of the old-world weight. The full arch, sometimes called a Moorish or Romanesque arch, traces back to the Spanish missions and the Mediterranean influence that came with them. An arched interior door signals that you are committed to the style. It works best in spaces with ceiling heights of nine feet or more, where the arch has room to breathe.
Square tops are more versatile. They fit standard-height openings, work with both rustic and Colonial aesthetics, and pair naturally with raised-panel designs. Many of our square-top doors have enough hand-carved or hand-forged detail that they read as distinctly Spanish even without the arch. The Puerta Kamila is a good example. Multi-panel layout, raised edge moulding, vertical plank insets. The silhouette is square, but everything else anchors it to the tradition.
If your home already has arched doorways built into the framing, an arched door is the natural fit. If you’re retrofitting standard openings in an existing home, square top gives you more flexibility while still delivering the look.
Panel Design and Iron Hardware
The panel layout is where most of the visual character lives. Spanish Colonial doors typically feature multiple raised panels with moulding that creates depth and shadow. The geometry is deliberate. Two panels, four panels, vertical planks inside horizontal frames. Each variation has precedent in Spanish architecture going back centuries.
Iron hardware ties the door to the rest of the space. Hand-pounded iron clavos, the round-headed nail studs used in Spanish Colonial construction, appear on many of our interior doors. They’re not decorative add-ons. They were originally structural, used to reinforce plank construction against splitting. On a solid alder panel door, they carry that same authenticity.
Iron straps, hinges, and pulls extend the metalwork across the full face of the door. We hand-forge all of it in the same tradition as the decorative iron throughout the rest of DeMejico’s catalog. The texture of hand-forged iron, with its slight irregularity and surface variation, is different from stamped hardware. You can see the difference in photographs. You can feel it when you use the door.
Specialty Interior Doors: Pantry, Closet, and Wine Room
Not every interior door is a passage door. Closets, pantries, wine cellars, and media rooms all have their own requirements. We build doors for all of these openings, and the approach is the same regardless of function: solid alder, hand-forged iron, panel construction consistent with the rest of the home.
The Closet Puerta Hoja is one of our more intricate pieces. A double door built for a custom closet opening, it features a Spanish arch top and hand-carved floral panels. That level of work on a closet door is not the norm, but in a home where the rest of the millwork carries the same standard, it’s the right call.
The Salamanca Pantry Door follows the Salamanca exterior door design adapted for a kitchen pantry opening. Same full arched frame, solid knotty alder, dark stain that lets the natural knots read through. A pantry door with this kind of presence makes the kitchen feel considered rather than assembled from whatever was available.
The Hacienda French Door offers a different solution for spaces that need light passage between rooms. Two tall glass panels with subtle arched tops allow natural light to move through while maintaining the visual language of the home. The solid alder frame keeps it from looking like a standard interior French door.
Finish Options and Customization
All of our interior doors are available in the stain options we carry across the full DeMejico collection. Dark walnut, medium brown, and lighter natural finishes that let the wood grain lead. The finish choice should be made alongside the other woodwork in the space. An interior door in a room with mesquite furniture in a dark stain should carry the same palette.
Sizing is flexible. Most of our doors are built to standard residential dimensions, but custom sizing is part of what we do. If your opening is non-standard, or if you’re building a new space around a specific door design, we can work to dimensions. This is especially relevant for arched tops, where the arc radius needs to be calculated against the door height and width together.
Custom carving is also available for interiors, as it is for exterior doors. Hand-carved panels add time to the build but produce something that is genuinely one-of-a-kind. No two carved panels come out identical. That’s not a limitation of the process. It’s the result of it.
Installation Considerations
Solid alder doors weigh more than hollow-core slabs. That’s not a problem, but it does require the right hinges and proper framing. We typically recommend heavy-duty hinges rated for the door weight, and we can advise on hinge count and placement during the ordering process.
For arched-top doors, the opening needs to match the arch. If you’re replacing a door in an existing square opening, a square-top door is the practical choice unless you’re willing to modify the framing. For new construction or a full renovation, arched framing can be incorporated from the start.
Pre-hanging is available. A pre-hung door comes with the jamb assembled and the door already hung in it, which simplifies installation. We can build pre-hung units for most of our interior door designs.
You can view our interior door catalog in person at our Valencia showroom. We carry a selection of doors in stock for clients who need something quickly, and our full catalog is available for custom order. The difference between seeing a door on a screen and seeing it in a 30,000 square foot showroom is significant. The scale, the weight, the texture of the iron hardware. These things read differently in person.
