Left-hand and right-hand sound wonderfully simple until two people stand on opposite sides of the opening. A small plan-view drawing prevents that conversation from becoming a custom door that opens into the vanity. Use the drawing to describe the result, then confirm the supplier's exact naming convention.
Draw the room rather than your hand
Sketch the wall opening from above. Label the rooms on each side, put a dot at the hinge side, and draw the door leaf with an arc showing its travel. Mark which side you are standing on when describing it. Include the toilet, vanity, light switch and nearby cupboard doors.
Photograph the existing opening from both sides if the new swing should match it. A photograph of a closed door alone may hide the hinges and tell the supplier very little. If the swing is changing, make that change obvious on the drawing rather than expecting someone to infer it from the old door.
Use the supplier's definition
JELD-WEN's interior door guide explains its handing convention by viewing the door from the side into which it pulls, with the hinge barrels visible. Under that convention, hinges on the left identify a left-hand door. Confirm that the supplier uses the same convention for the product being ordered.
Do not apply a remembered exterior-door or hardware shorthand without checking. Ask the supplier to mark the hinge side and swing on the order drawing. A written label plus an agreed drawing gives you something clearer to check at delivery than a rushed phone conversation.
| Order detail | Record it this way |
|---|---|
| Hinge position | Mark it on a labelled plan |
| Swing | Draw the open leaf and arc |
| Viewing side | Name the room you are standing in |
| Supplier terminology | Confirm its handing label beside the drawing |
| Hardware preparation | List hinges, latch and lock function |
Know whether you are buying a slab or an assembly
A prehung door includes a frame and is ordered as an assembly. A replacement slab has to match the existing frame and hardware preparation. Hinge positions, edge preparation and latch location can make a slab unsuitable even if its nominal width and height look right.
If you intend to keep the frame, use the replacement-slab guide before placing the order. Measure the actual opening and door as requested by the supplier. Do not assume nominal dimensions describe every finished component or the rough opening needed for a new frame.
Check the swing with real obstructions
Tape the proposed door edge and swing on the floor, or use a cardboard outline where practical. Check the handle as well as the door leaf; the projecting lever can hit a wall, towel bar or cabinet before the leaf reaches the expected position. Include the space needed to stand and operate nearby fixtures.
For a bathroom, a change in swing can affect access and usability. Check the whole room rather than solving only the hinge question. If you are also selecting hardware, privacy-lock emergency access should be part of that decision. Handing does not tell you whether the lock has the function you need.
Inspect before cutting or painting
At delivery, compare the door with the approved drawing while it is still unmodified. Confirm the hinge side, swing, frame depth, dimensions, hardware preparation and any specified glass or panel orientation. Report a mismatch before trimming, mortising or painting makes a return harder.
A useful order note might say: viewed from inside the bathroom, door pulls toward the viewer and hinges are on the left; supplier confirms its left-hand designation. Add the drawing and product identification. That description is intentionally repetitive. Repetition is cheaper than reordering a door.