How to Choose Interior Doors for Multi-Family & Apartment Projects

If you are fitting doors across 40, 100 or 400 units, the door package becomes a logistics and quality-control problem as much as a design decision. A door that looks perfect in a show unit can create months of warranty work when it is repeated across a whole building.

This guide covers the six factors that most often decide whether a multi-family door package runs smoothly or becomes an expensive headache.

1. Batch consistency beats sample quality

The most common failure in multi-family projects is not a bad door — it is doors that do not match each other. If the finish for phase two is produced months after phase one, a different paint batch can leave corridors visibly mismatched.

Ask your supplier two questions before ordering: will all doors for the project be produced in one batch, and will they retain the approved colour record for later phases? A manufacturer who can answer yes to both is worth more than one who quotes 5% cheaper.

2. Keep the construction simple enough to repeat

Every extra profile, inlay or non-standard size multiplies the chance of a production error across hundreds of leaves. A standardised leaf construction — consistent thickness, one jamb profile, one hardware preparation — keeps the failure rate close to zero.

3. Pre-drilled hardware saves real money on site

On-site fitting time is one of the largest hidden costs in a door package. Pre-drilled lock holes and hinge positions remove the need for the installer to measure and mortise every leaf — which matters when the same operation is repeated 400 times.

If your labour rate is $60–$90 per hour and pre-drilling saves 10–15 minutes per door, the saving across 400 doors is measured in thousands of dollars, not hundreds.

4. Plan production and shipping in phases

Most factories build to order, so the production calendar drives your installation schedule. Two practical rules:

• Confirm the door schedule at least 6–8 weeks before the first install date, not after the drywall is finished.
• If the building will be handed over in phases, ship in phases. Consolidated containers keep freight cost down, but a single delivery of 400 doors creates a storage problem on site.

5. Documentation your inspector will ask for

Imported interior doors increasingly require emissions documentation. In North America, CARB Phase 2 and EPA TSCA Title VI are the two standards most often requested for composite wood products. Ask for the documentation up front — it is far easier to obtain before production than after the container has shipped.

6. Warranty and replacement strategy

Order 2–3% spare leaves in the same batch. It is the cheapest insurance you can buy: a single damaged door from a later production run may not match the installed finish, and re-shipping one leaf overseas rarely makes economic sense.