Factory-Controlled Interior Door Systems — Built to Spec
Most interior doors are sold as individual components. MR DOOR US delivers complete, factory-assembled interior door systems—engineered, aligned, tested, and packaged as a single unit for predictable installation and consistent results.
Backed by large-scale manufacturing capability, we support both in-stock pre-hung systems and fully custom interior door production for residential, commercial, and multi-unit projects across the United States.
Complete system delivered factory-aligned: door slab, frame, hardware, and casing — ready to install.
Factory-direct control over how your doors are:
Designed, Built, and Delivered.
This is not a slab-and-hardware package. It is a complete interior door system — built once, installed once, done right.
Built as Complete Door Systems — Not Loose Parts
Each system is delivered as one factory-aligned unit:
Most interior doors are sold as individual components — slab, frame, hardware, casing — sourced separately and assembled on site.
- Solid or engineered door slab built to specified size, thickness, and finish
- Pre-hung frame & jamb, factory-squared and aligned
- Concealed or surface hinges — installed and adjusted
- Magnetic mortise lock — installed and tested
- Concealed or Pre-cut casing set — matched, labeled, and packaged Nothing sourced separately. Nothing aligned on-site.hinges — installed and adjusted
This approach reduces job-site variability, labor time, and installation errors — especially across multi-unit or repeat projects.
How You Can Work With
MR DOOR US
Whether you need ready-to-install systems or doors built entirely to spec, MR DOOR US supports projects at every stage — from single homes to large-scale developments.
In-Stock Pre-Hung Door Systems (Factory-Direct)
Factory-assembled interior door systems designed for fast, repeatable installation and predictable results. Each unit is built, aligned, and packaged at the factory—ready to install on arrival.Ideal for renovations, flips, tenant improvements, and time-sensitive projects. Limited in-stock configurations available.Best for: Contractors, remodelers, and homeowners who need speed, consistency, and factory-direct reliability.
Custom Interior Door Manufacturing
Fully custom interior door systems manufactured under factory-controlled production. Built from drawings, reference images, or detailed specifications, with full control over dimensions, materials, finishes, and system configuration.Produced at scale with consistent tolerances and repeatable results across single builds and multi-unit projects.Best for: Architects, developers, builders, and designers requiring custom specifications and controlled lead times.
Contractor & Wholesale Supply
Factory-direct interior door systems for repeatable specifications and volume projects. Our model delivers consistent quality, scalable production, and predictable lead times—without retail markups or pieced-together components.Supports both in-stock systems and large-scale custom manufacturing with nationwide fulfillment.Best for: Contractors, developers, and wholesale partners who require dependable supply and long-term project reliability.
What’s Included in a Complete Door System
All Full Packaged luxury interior doors are delivered as a factory-assembled system, not a collection of parts sourced and fitted on site.
Each component is selected, installed, and aligned at the factory to ensure consistency, performance, and clean installation.
Each system includes:
-
Door slab
Solid or engineered core, built to specified size, thickness, and finish. -
Pre-hung frame & jamb
Factory-squared and aligned to the slab for proper reveal and swing. -
Hinges (Concealed or surface-mounted)
installed, adjusted, and factory-tested. -
Magnetic mortise lock
Pre-installed and precisely aligned for smooth operation and clean aesthetics. -
Pre-cut casing set
Matched to the system and packaged together for a consistent trim finish.
This approach reduces job-site variability, labor time, and installation errors compared to sourcing doors and components separately.
Whether installing a single door or coordinating dozens across a project, the system remains consistent by design.
Why Contractors Choose System-Built Doors
Faster installs, fewer errors, and repeatable results across every opening.
FASTER INSTALLATION
Factory alignment means the door, frame, and hardware arrive ready to install — reducing on-site fitting, drilling, and adjustment.
FEWER ERRORS & CALLBACKS
System-built doors reduce misalignment issues that cause rework — consistent reveals, swing, and hardware fit checked before shipment.
CONSISTENT RESULTS
Repeatable specifications across every opening — built to the same approved details for single homes or multi-unit projects.
BETTER PLANNING
With a complete system delivered as one unit, labor estimates improve and scheduling surprises are reduced on site.
FACTORY QUALITY CONTROL
Each interior door system is assembled and checked before shipment — turning openings into installations, not on-site fabrication tasks.
Request a Quote for Your Interior Door Project
Send your sizes, reference images, or door schedule — we’ll confirm specifications and provide pricing with lead times.
Wholesale, Reseller & Dropshipping Programs
Program Overview
Wholesale & Dropshipping: Partner with MR DOOR US for factory-direct pricing on luxury interior doors and complete interior door systems. We support resellers, contractors, showrooms, and online sellers with consistent specs, repeatable supply, and program-based ordering.
In-Stock + Custom Capability: Offer in-stock systems when speed matters, or submit drawings, reference images, and project specs for custom interior door manufacturing under direct factory control.
- Factory-direct pricing tiers
- Program approval + renewals
- Support for single orders to volume projects
Meet MR DOOR US INC at IBS 2026
NAHB International Builders’ Show — Orlando, FL
February 17–19, 2026
Join MR DOOR US at IBS 2026 to see the Daegu full-package interior door system in person and discuss custom project requirements directly with our team.
Explore the complete factory-built system, understand how it installs, and review in-stock availability, custom manufacturing options, and project supply capabilities.
This is the best opportunity to evaluate fit, finish, and system quality before committing to larger orders.
Dongguan Mingren Industry Co., Ltd is our Factory (See our Projects here)
