For contractors, doors are not just a finishing detail — they’re a coordination point between framing, drywall, flooring, hardware, schedules, and budgets. Ordering the wrong door size, swing, or material can delay an entire project, cost money in reorders, and damage client trust.
This guide is a professional-grade door buying checklist designed specifically for contractors, builders, and project managers. It walks through everything you need to confirm before placing an order — from technical specifications and lead times to pricing strategies and cost-saving tips.
If you manage multiple installs or large projects, bookmarking this checklist can save you hours — and thousands of dollars — over time.
1. Confirm Project Scope Before Selecting Doors
Before looking at styles or materials, clearly define the scope of the project.
Ask yourself:
Is this new construction, renovation, or like-for-like replacement?
Are doors being installed all at once or in phases?
Are interior and exterior doors being sourced together or separately?
Why this matters:
New builds usually allow more flexibility with rough openings, while renovations often require precise matching to existing frames. Knowing the scope upfront prevents ordering doors that require unexpected framing changes.
2. Accurate Measurements: The Foundation of Every Order
Even experienced contractors make measurement assumptions — and that’s where problems start.
What You Must Measure
Door slab size (height × width × thickness)
Frame (jamb-to-jamb) size
Rough opening dimensions
Finished floor height (especially with tile, hardwood, or carpet transitions)
Ceiling height (important for tall or custom doors)
Measure each opening individually — never assume uniform sizing across a property, especially in older buildings.
Pro tip: Always record measurements in writing and label them by room or opening number. This avoids confusion during ordering and installation.
3. Determine Door Type: Slab vs. Prehung
Choosing between a slab door and a prehung unit affects cost, labor time, and installation complexity.
Slab Doors Are Best When:
Existing frames are square and in good condition
You want faster installs
Budget is a priority
Prehung Doors Are Better When:
Frames are damaged, warped, or outdated
You’re changing swing direction
You want factory-aligned hinges and weatherstripping
For large projects, mixing both types is common — just make sure each opening is clearly documented.
4. Confirm Door Swing & Handing (Critical!)
One of the most common — and costly — mistakes contractors make is incorrect swing selection.
You must confirm:
Left-hand or right-hand swing
In-swing or out-swing
Clearance for walls, cabinets, or fixtures
Always determine swing from the outside (pull side) of the door.
Mistakes here lead to:
Doors hitting walls or appliances
Failed inspections
Client dissatisfaction
Double-check swing direction on site before ordering — especially for bathrooms and exterior doors.
5. Choose the Right Material for Each Application
Material choice impacts durability, maintenance, cost, and energy efficiency.
Common Door Materials
Hollow-core: Lightweight, budget-friendly, low sound insulation
Solid-core: Better durability and sound control
Wood: Premium look, requires maintenance
Fiberglass: Excellent for exterior use, low maintenance
Steel: Strong, secure, energy efficient
Match material to usage:
Bedrooms and offices benefit from solid-core doors
Exterior doors require insulation and weather resistance
High-traffic areas need durability over aesthetics
6. Hardware Prep & Compatibility
Doors are not complete without the correct prep for hardware.
Confirm:
Bore hole size and location
Hinge type and finish
Lockset and deadbolt requirements
ADA or code-compliant hardware (if applicable)
If doors are pre-drilled incorrectly, rework adds time and cost. Always match door prep to the exact hardware being used.
7. Lead Times: Planning Around Reality
Lead times can vary significantly based on:
Door type and material
Custom sizing
Finish or paint requirements
Supply chain availability
Typical Lead Times
Stock interior doors: 3–7 days
Stock exterior doors: 1–2 weeks
Custom or specialty doors: 4–10+ weeks
Plan orders early and communicate lead times clearly with clients to avoid schedule conflicts.
8. Cost Optimization for Contractors
Smart ordering saves money without sacrificing quality.
Cost-Saving Strategies
Order in bulk to secure better pricing
Standardize sizes where possible
Choose stock finishes instead of custom
Coordinate door and hardware orders together
Also consider total cost, not just purchase price:
Installation time
Rework risk
Warranty coverage
A slightly higher upfront cost often results in lower long-term expenses.
9. Compliance, Codes & Inspections
Doors must meet local building codes and safety standards.
Common compliance requirements:
Fire-rated doors between garage and home
Self-closing mechanisms where required
Egress clearance for bedrooms
ADA clearance in commercial spaces
Verify local codes before ordering — replacing non-compliant doors after inspection is expensive and avoidable.
For contractors, doors are not just a product — they’re a coordination point that affects schedule, budget, and client satisfaction. Using a structured checklist ensures every order is accurate, efficient, and profitable.
Whether you're managing a single remodel or multiple builds, taking the time to plan door orders properly pays off in fewer delays, smoother installs, and happier clients.
Need help sourcing the right doors for your next project?
Romo Door Supply works with contractors to provide expert guidance, reliable lead times, and quality doors that fit your specs — the first time.