Door shops exist to take the carpentry out of the door order. A builder calls in the sizes, and the shop measures, sources, pre-hangs, and delivers doors ready to set in the opening. The scale of these operations is substantial: a large-market door shop can span more than 80,000 square feet, and a national network may run more than 30 of them alongside component plants, engineered wood centers, and lumber stores. The shop handles custom and stock interior doors for single-family and commercial construction alike, which gives crews on the job consistent product and consistent lead times. Door shops also buffer the builder against plant lead times: the shop carries stock, so a change order does not restart a factory line. Even a modest change to a door, such as adding glass to a solid wood door through a door lite installation, affects the frame, the swing, and the ordering details, so the shop coordinates those choices with the builder before the order goes to the plant.
How Door Shops Support Residential and Commercial Builders
Door shops concentrate the work that used to happen on the jobsite. Instead of a carpenter cutting, fitting, and hanging every door, the shop pre-hangs units, machines hinge pockets, and applies finish in a controlled environment. The builder receives a door that fits the rough opening, with hardware installed and the swing marked. Prehung units arrive squared and braced, ready for the carpenter to set and shim, which trims an hour or more per opening on a large house. That division of labor keeps the jobsite schedule tight and the finished product consistent from unit to unit.
Door Shop Services
A full-service door shop covers the steps between the door schedule and the opening.
- Stock interior doors in common sizes for same-week delivery
- Custom sizing, cutting, and panel configuration
- Prehung assembly with jambs and casing
- Hinge and hardware preparation to match the specification
- Delivery and staging by job, sorted by room or floor
Coordinating With the Framing Crew
Door orders depend on the frame. The rough opening has to be framed and sized before the prehung unit can be ordered with confidence, and the shop needs final measurements, not plan dimensions. When a plan calls for a new passage, crews weigh adding a door opening to an existing wall with a structural and framing guide before cutting studs, because headers, king studs, and jack studs carry the load above the opening.
Scheduling Delivery Around the Build Sequence
Timing follows the construction sequence. Prehung doors arrive after the rough openings are framed but before drywall closes the walls; finished slabs come later, after painting. The shop coordinates both waves so the trailer lands on site when the crew is ready for it. A typical shop order runs through five steps.
- Send the door schedule with widths, heights, and swing directions
- Confirm rough opening measurements against the schedule
- Choose stock or custom, plus fire rating and finish
- Set delivery windows around the build sequence
- Receive, stage, and verify units before installation
Custom Doors vs Stock Doors
The first decision on any door order is stock or custom. Stock doors come in standard widths and heights, built to production tolerances, and priced for volume. Custom doors are manufactured to the job’s dimensions, panel layout, and finish, which costs more and takes longer but solves non-standard openings and design requirements. Most production builders standardize on two or three stock sizes and one finish, which keeps the shop’s inventory shallow and the price low.
| Factor | Stock door | Custom door |
|---|---|---|
| Lead time | In stock or a few days | Two to six weeks |
| Cost per door | Lower, volume pricing | Two to four times stock |
| Size range | Standard widths and heights | Any dimension |
| Finish options | Limited factory finishes | Wide, job-matched |
| Best fit | Production homes, repeats | Renovations, historic work |
When Remodeling Drives Custom Orders
Renovation work pushes builders toward custom sizing. Older homes rarely match modern rough opening standards, and existing walls constrain the opening size. For remodelers, adding a door opening in an existing wall is a common trigger for a custom order, since the available width and height are set by the structure, not by a catalog.
Fire-Rated and Specialty Doors
Commercial projects add requirements that stock residential doors cannot meet. Fire-rated doors carry labels from 20 to 90 minutes, acoustic doors attenuate sound between rooms, and security doors use reinforced frames and hardware. Each specialty adds lead time and inspection steps, so the shop verifies the rating against the full assembly, including frame and hardware, not just the slab.
Door Sizing, Rough Openings, and Framing
Rough opening dimensions drive everything downstream. For a prehung interior door, the rough opening is typically 2 inches wider and 2.5 inches taller than the door slab: a 32-inch door needs a 34-inch opening, and an 80-inch door needs an 82.5-inch opening. The extra space lets the installer plumb and shim the frame before fixing it in place. Door widths in 2-inch increments, from 24 to 36 inches, and heights of 80 or 96 inches cover the vast majority of openings in new construction.
Common Interior Door Sizes
- 24, 28, 30, 32, and 36 inch widths cover most residential needs
- 80 inch is the standard height; 96 inch tall doors suit high ceilings
- Double doors span 48 to 72 inch openings for closets and suites
Swing Direction and Clearances
Swing direction affects layout, safety, and code. Doors generally swing into the room, clear of the entry path, and accessible routes require a 32-inch clear opening. Clearance around the swing keeps the door from clashing with light switches, thermostats, and adjacent casework.
Framing the Opening
The frame transfers load around the opening. Builders cutting a new passage in a framed wall follow a door opening framing and installation guide that covers header sizing, king studs, jack studs, and load transfer, so the wall above stays supported after the opening is cut.
| Door width | Rough opening width | Door height | Rough opening height |
|---|---|---|---|
| 24 in | 26 in | 80 in | 82.5 in |
| 30 in | 32 in | 80 in | 82.5 in |
| 32 in | 34 in | 80 in | 82.5 in |
| 36 in | 38 in | 80 in | 82.5 in |
Sourcing Doors and Lumber From the Yard
Most door shops sit inside or beside a lumber yard, and the same order that buys the doors buys the framing material around them. Contractors who understand how to buy lumber for construction, from lumber yard practices to material planning, order studs, headers, and trim in the same trip as the prehung units, which cuts delivery costs and keeps material grades consistent.
Engineered Wood Products
Headers over wide openings need more strength than solid framing can provide. Engineered products such as laminated veneer lumber and I-joists carry the load across spans of six feet or more, and distributors stock them in dedicated engineered wood centers so builders can pick the right size without special ordering. Rail-served yards bring in the raw material in volume, which keeps the price stable through the build season. Bulk buying changes the math: a builder ordering doors for a 50-unit apartment building negotiates per-unit pricing, staged deliveries, and defect allowances that a single-door buyer never sees, and the yard’s credit terms become part of the project cash flow.
Installation Details That Affect Performance
A door performs only as well as its installation. The frame must be square, plumb, and level, held by shims at the hinges and latch, with screws driven through the jamb into the framing. Gaps stay consistent around the slab, and the door swings freely without binding on the floor or the casing. Small details decide how the door feels for the next twenty years, and the same care applies to commercial doors, where frame anchors and heavy hardware carry higher loads and the tolerances are tighter.
Sealing the Bottom Edge
The gap under the door is the most common source of drafts, noise, and light bleed. A door sweep seals that gap and adjusts to the floor, and adding a door sweep is a fast retrofit that upgrades an existing door without replacing it.
Common Installation Mistakes
- Oversized gaps around the frame that no casing will hide
- Missing shims at the hinge locations
- Overdriven screws that pull the jamb out of square
- Frames checked for level but not for plumb
Supply Chains Behind Door Manufacturing
Door production sits at the end of a long supply chain. Component plants cut and machine the stiles, rails, and panels; door shops assemble and pre-hang the units; and engineered wood centers supply the headers and jambs. The chain works when the facilities sit close to the markets they serve, which is why distributors build regional networks of stores, shops, and plants instead of one national factory.
Lumber Supply and Mill Consolidation
The raw material side of the chain is consolidating. Lumber mill consolidation reshapes lumber supply for builders as capacity concentrates in fewer, larger mills, which changes lead times, grades, and pricing for everyone downstream, from the component plant to the door shop to the jobsite.
Rail service and regional facilities shorten the final leg of the chain. A distribution campus with rail access can receive lumber and engineered products in volume, hold them through the manufacturing steps, and ship finished door units to jobs across the region, which keeps builder schedules moving through every phase of construction.