Architectural antiques
Antique and Salvaged Doors
A salvaged door carries its history in plain sight once you know where to look. The panel count, the way the stiles and rails are joined, the wood, and the marks left by the hardware all point at an age and an origin, and together they tell you whether a door is worth the trouble of hanging.
Reading the panels and joinery
Start with the panels. Early doors tend toward taller, narrower panels and six-panel or four-panel arrangements, while later mass-produced doors settle into simpler patterns. None of this is a strict calendar, so read it as a tendency rather than a date stamp.
Then look at the joints. A traditional panel door is built as a frame of stiles and rails with the panels floating in grooves so the wood can move with humidity. Genuine mortise-and-tenon joints, sometimes pinned with a wooden peg, point to older or better construction. Doweled joints and glued-up stock point to later factory work. Look at the panel edges too: a hand-raised panel has slightly irregular bevels, a machine-cut one is uniform.
Wood and tool marks
The wood narrows the field. Much old interior joinery is pine, but doors in better houses turn up in oak, walnut, and longleaf heart pine that is denser and heavier than modern softwood. Weight in the hand is a real signal. Tool marks help date the lumber: straight, even saw kerfs and later circular-saw arcs sit at different points in the timeline, and hand-planing leaves shallow scallops a machine does not.
Because so much depends on close looking, this page sits under the wider architectural antiques and salvage guide, which explains where San Antonio salvage comes from and how it is priced. Use the two together.
Condition, paint, and lead
Sight down the door edge-on to check for warp and twist, and open and close it in its frame if you can. Look at the bottom rail, which rots and swells first, and at the mortises cut for locks and hinges, which tell you what hardware the door has worn over its life. Layered paint is normal on an old door and is not a defect by itself.
It is, however, a health question. Assume paint applied before 1978 may contain lead. Do not dry-sand or heat-strip it in an occupied space. Paint removal on old doors is a job to hand to someone following the current lead-safe rules, and the United States Environmental Protection Agency publishes the standard for that work. When in doubt, leave the finish alone until you have advice.
Fitting an old door to a new opening
Old doors are rarely a modern standard size and old openings are rarely plumb, so measure both before you buy. A door can be trimmed a small amount at the stiles and bottom, but there is a limit before you cut into a panel or lose the joint, and a door that is too small cannot be enlarged. Check thickness as well, because interior and exterior doors differ and the lock hardware is cut for a specific thickness.
If the door still carries hardware, the mortises and screw holes tell you the backset and lock type you will need to match. That is a subject in its own right, covered in the guide to antique door hardware.
Ranges and periods here are general guidance for planning, not an appraisal. Condition and provenance change value substantially. For a specific door, consult a qualified appraiser or an experienced salvage dealer.
Common questions
Are salvaged doors worth the cost of refitting?
It depends on the door and the opening. A sound old door with good wood and detail can be worth the fitting labor, while a warped or heavily damaged door often is not. Measure the opening first and price the hanging and any hardware before deciding.
How can I tell roughly how old a door is?
Read the panel arrangement, the joinery, the wood, and the tool marks together rather than any one of them alone. They point to a period, not an exact year. For a piece that matters, ask a qualified appraiser or an experienced salvage dealer.