Key Takeaways: Door Installations at a Glance
For B2B buyers, a door installation is not a single product purchase but a system decision. The door leaf, frame, hardware, and installation method must work together to meet performance requirements—thermal efficiency, fire ratings, security, acoustic insulation, and weather resistance. The most common types are hinged doors (casement and single/double swing), sliding doors, folding doors, and pivot doors. Material choice—solid wood, aluminum, steel, or composite—drives both performance and cost more than any other factor.
Standard residential doors typically range from 30 to 36 inches in width and 80 to 84 inches in height, but commercial projects and custom homes frequently require non-standard sizes. A 90-inch door (7 feet 6 inches) is a common custom height for tall entryways, luxury villas, and commercial storefronts, and it directly affects framing, hardware selection, and cost.
The decision framework for any project comes down to four variables: application, performance requirements, budget, and local building codes. This guide breaks down each door type, compares materials and costs, and explains what to verify before sourcing from a manufacturer.
Different Types of Doors: A Detailed Breakdown
Hinged Doors (Casement and Swinging)
Hinged doors are the most widely used type in both residential and commercial construction. They swing on vertical hinges and can be single-leaf or double-leaf. Casement doors are a subtype where the door panel is hinged at the side and swings outward or inward. In commercial settings, hinged doors are preferred for entrance points that require controlled access, fire-rated separation, or high weather resistance.
Advantages: Simple operation, excellent sealing when closed, easy to integrate with access control systems, and available in virtually any material.
Limitations: Requires clear floor space for the swing arc; not ideal for high-traffic areas with limited space.
Sliding Doors
Sliding doors move horizontally on tracks, either recessed into a wall pocket or mounted on exterior tracks. They are common for patios, balconies, and interior partitions where space efficiency matters.
Advantages: Saves floor space, allows large glass panels for natural light, and suits wide openings.
Limitations: Sealing is generally less effective than hinged doors, which impacts thermal and acoustic performance. Track maintenance is an ongoing consideration.
Folding Doors (Bi-fold and Multi-fold)
Folding doors consist of multiple panels connected by hinges that fold against each other when opened. They are used for large openings such as restaurant fronts, conference rooms, and residential spaces that open to outdoor areas.
Advantages: Opens a large area completely, versatile for mixed-use spaces.
Limitations: More moving parts means higher maintenance; sealing between panels can be a weak point for weather resistance.
Pivot Doors
Pivot doors rotate on a central pivot point rather than side hinges. They are increasingly common in high-end commercial and residential projects for their aesthetic and ability to handle oversized, heavy door leaves.
Advantages: Handles very large and heavy doors smoothly; creates a distinctive entrance statement.
Limitations: Higher cost, requires precise framing and floor preparation, and hardware is more specialized.
Material Comparison: Solid Wood, Aluminum, and Others
Solid wood doors remain a benchmark for premium residential and hospitality projects. They offer natural aesthetics, good acoustic insulation, and can be refinished over time. However, solid wood is dimensionally sensitive to humidity and temperature changes, which can cause warping or sticking. For exterior applications, solid wood requires a protective finish and regular maintenance.
Aluminum doors dominate commercial and modern residential applications. Aluminum frames provide structural strength with a slim profile, which maximizes glass area. Thermal-break aluminum—where a polyamide strip separates the interior and exterior aluminum sections—significantly improves insulation performance. Aluminum is corrosion-resistant, low-maintenance, and fully recyclable. Its main drawback is higher thermal conductivity without the thermal-break feature, and the material cost is higher than steel or uPVC.
Steel doors are common in commercial and industrial settings where security and fire resistance are priorities. They are strong, durable, and can achieve high fire ratings. The trade-off is poor thermal insulation unless insulated cores are specified, and dents in steel are difficult to repair.
uPVC (vinyl) doors are cost-effective and energy-efficient, making them popular in residential and light commercial projects. They require minimal maintenance and offer good insulation. However, uPVC is less rigid than aluminum or steel, limiting maximum door sizes, and color options are more restricted.
Door Installations Compared: Materials, Sizes, and Costs
| Door Type | Typical Material | Common Applications | Standard Size Range | Relative Cost |
|---|---|---|---|---|
| Hinged (single) | Solid wood, aluminum, steel | Entrances, offices, hotel rooms | 30–36″ W × 80–84″ H | Low to High |
| Hinged (double) | Solid wood, aluminum, steel | Main entrances, conference rooms | 60–72″ W × 80–84″ H | Medium to High |
| Sliding | Aluminum, uPVC | Patios, balconies, partitions | 60–120″ W × 80–84″ H | Medium |
| Folding | Aluminum, wood | Restaurants, large openings | 96–192″ W × 80–96″ H | Medium to High |
| Pivot | Aluminum, wood | High-end entrances, showrooms | 36–60″ W × 84–120″ H | High |
| Custom (e.g., 90-inch door) | Any | Tall entryways, commercial storefronts | Up to 48″ W × 90–120″ H | High |
Cost is driven by material, size, glazing, hardware quality, and finishing. A standard interior hollow-core door costs a fraction of a solid wood or thermal-break aluminum door with triple glazing. For accurate budgeting, request pricing based on the complete assembly—frame, leaf, hardware, and installation—rather than the door slab alone.
How to Choose the Right Door Installation for Your Project
Define the Application and Performance Requirements
Start with the opening’s function. An exterior entrance has different demands than an interior partition. For exterior doors, prioritize weather resistance, thermal performance, and security. For interior doors, acoustic properties, fire ratings, and aesthetics may matter more.
Thermal performance is measured by the U-value (lower is better) or R-value (higher is better). In cold climates, a thermal-break aluminum frame with double or triple glazing is often required to meet energy codes. In hot climates, solar heat gain coefficient (SHGC) becomes the critical metric.
Fire ratings are mandatory in many commercial applications. A fire-rated door must be certified to local standards (e.g., UL in North America, BS in the UK, EN in Europe) and installed with approved hardware. Fire-rated doors are not interchangeable with standard doors—the frame, seals, and glazing must all be rated.
Evaluate the Opening and Framing Conditions
Before selecting a door, measure the rough opening precisely. The rough opening is the framed gap in the wall where the door unit will be installed. Standard practice is to order a door unit that is slightly smaller than the rough opening to allow for shimming and leveling. For a 36-inch door, the rough opening is typically 38 inches wide and 82.5 inches high for an 80-inch door.
Non-standard openings require custom-sized doors. A 90-inch door is a common custom height for projects with taller ceilings or design requirements. Custom sizes affect the manufacturing process—the frame must be cut to exact dimensions, and hardware (hinges, locks, closers) must be rated for the door’s weight and size. A taller door increases leverage on hinges, so heavier-duty hinges and potentially a pivot system are needed.
Understand Local Building Codes
Building codes vary significantly by jurisdiction. Key requirements typically include:
- Egress: Doors must provide a clear opening width (usually 32 inches minimum) and must be operable without special knowledge or tools.
- Fire safety: Commercial buildings often require fire-rated doors in specific locations, with self-closing devices and positive-latching hardware.
- Accessibility: ADA (Americans with Disabilities Act) in the US, or equivalent standards elsewhere, mandate door widths, hardware heights, and operating forces.
- Energy codes: Minimum thermal performance for exterior doors is now common in most regions.
Verify these requirements with local authorities before ordering. A door that meets the manufacturer’s specifications may still fail inspection if the installation does not comply with local amendments.
Additional Considerations: Sizes, Codes, and Customization
Standard vs. Custom Sizes: The 90-Inch Door
Standard interior doors are typically 80 inches (6 feet 8 inches) high, while exterior doors may be 80 or 84 inches. The 90-inch door (7 feet 6 inches) sits above these standards and is used for grand entrances, commercial storefronts, and spaces with elevated ceilings.
A 90-inch door is not merely a taller version of a standard door. The additional height affects:
- Framing: The rough opening must be framed accurately to support the added weight and prevent racking.
- Hardware: Standard hinges may not support the door’s weight. Continuous hinges or pivot hardware are often specified.
- Glazing: Taller panels require thicker glass or tempered glass to maintain structural integrity.
- Cost: Custom sizes increase material waste, manufacturing time, and shipping costs. Expect a premium over standard sizes.
When specifying a 90-inch door, confirm the actual dimensions with the manufacturer. Some manufacturers produce doors in metric sizes that are close to but not exactly 90 inches, which can cause installation issues if not caught early.
Pre-hung vs. Slab Doors
For B2B buyers, the choice between pre-hung and slab doors is an installation decision.
Pre-hung doors come with the door leaf already attached to the frame, with hinges and strike plate installed. The installer places the entire unit into the rough opening and secures it. This is faster, ensures proper alignment, and is recommended for exterior doors and any door where weather sealing or fire rating matters.
Slab doors are just the door leaf. The frame, hinges, and hardware are installed separately. This approach offers more flexibility in matching existing frames but requires more installation skill and time. For large projects, slab doors can be more economical if the framing is already in place and consistent.
Procurement Tips for B2B Buyers
When sourcing doors for a project, focus on these factors:
- Consistency: For multi-unit projects, verify that all doors from a production batch meet the same specifications. Dimensional tolerances, finish consistency, and hardware compatibility should be confirmed before bulk ordering.
- Documentation: Request technical datasheets, test reports, and installation instructions. For fire-rated doors, ask for the certification documentation.
- Lead time: Custom sizes and finishes extend production lead times. A standard door may ship in weeks, while a 90-inch custom door with special glazing may take significantly longer. Plan procurement around the construction schedule.
- Sample verification: Before committing to a bulk order, request a sample or visit the factory to inspect actual production quality. Photographs and datasheets do not reveal surface finish, hardware feel, or assembly precision.
How to Evaluate Door Manufacturers for Bulk Supply
Quality Control and Pre-Shipment Inspection
The difference between a reliable manufacturer and a problematic one often shows in quality control. For exterior doors, performance testing is critical. Reputable manufacturers test for air-tightness, water-tightness, and wind resistance according to recognized standards (e.g., EN 12207, EN 12208, EN 12211, or ASTM equivalents). These tests simulate real-world conditions and verify that the door assembly—frame, seals, glazing, and hardware—performs as designed.
Ask manufacturers for their inspection process. A robust pre-shipment inspection includes checking dimensions against the order, verifying glass specifications, testing hardware operation, and examining surface finish. For large orders, third-party inspection is a common practice to ensure impartiality.
Manufacturing Capability and Customization
Evaluate whether the manufacturer can handle the specific requirements of your project. Key questions include:
- Can they produce custom sizes like 90-inch doors without compromising structural integrity?
- Do they offer a range of glass options (double glazing, tempered, laminated, low-E coatings)?
- Can hardware accessories be customized to match local standards and preferences?
- What is their experience with export packaging for international shipments?
A manufacturer that only produces standard sizes may not be suitable for projects with non-standard openings. Conversely, a manufacturer that handles full customization can adapt to specific project requirements but may have longer lead times.
Logistics and Documentation
For international procurement, logistics capability matters as much as product quality. A manufacturer experienced in foreign trade should provide complete documentation: packing lists, proforma invoices, and customs documents. They should be able to handle both full container load (FCL) and less-than-container load (LCL) shipments, depending on order volume.
Shipping doors requires proper packaging to prevent damage in transit. Quality manufacturers use protective wrapping, edge guards, and reinforced crates for glass panels. Confirm the packaging standard before placing an order.
Here Is How We Meet These Standards
As a factory-direct manufacturer, our approach to door installations is built around the specific needs of B2B buyers. We produce solid wood doors, thermal-break aluminum doors and windows, system windows, casement doors, sliding doors, and custom villa doors and windows. Because we are the manufacturer, there is no middleman markup, which directly impacts your project cost.
Our full customization capability covers size, color, glass, and hardware accessories. Need a 90-inch door for a tall entrance? We can produce it with the correct framing and hardware specifications. Need a specific profile structure to match local building codes? Our adjustable profile systems and fittings are designed to accommodate regional requirements.
Before shipment, every order undergoes strict pre-shipment inspection covering air-tightness, water-tightness, and wind resistance. This is not a cursory check—it verifies that the door assembly will perform to specification once installed.
For international buyers, we provide complete export documentation, including packing lists, proforma invoices, and customs paperwork. We handle both FCL and LCL shipments, with direct delivery from our factory in China.
If you are evaluating manufacturers for a project with specific door installation requirements, we can provide technical specifications and discuss how our production capability aligns with your needs.
Frequently Asked Questions About Door Installations
What is the most common door size for commercial projects?
Standard commercial doors are typically 36 inches wide and 80 or 84 inches high. However, accessibility codes and fire egress requirements may mandate specific clear opening widths, so verify local regulations before ordering.
How much does a custom 90-inch door cost compared to a standard door?
Custom sizes increase cost due to additional material, manufacturing time, and specialized hardware. The exact premium depends on material, glazing, and finish. For budgeting, expect a meaningful increase over standard sizes and request a detailed quote from the manufacturer.
What is the difference between a pre-hung and a slab door installation?
A pre-hung door arrives with the frame attached, simplifying installation and ensuring proper alignment. A slab door is just the leaf, requiring separate frame and hardware installation. Pre-hung is recommended for exterior and fire-rated doors; slab doors are more flexible for matching existing frames.
How do I know if a door meets fire safety requirements?
Fire-rated doors must be certified to local standards. Check for the certification label on the door edge and request the manufacturer’s test documentation. The frame, hardware, and glazing must all be part of the rated assembly—you cannot mix a rated door with non-rated components.
What should I check before placing a bulk door order?
Verify dimensional consistency across the batch, request technical datasheets and test reports, confirm lead times for custom sizes, and inspect a sample or visit the factory. For exterior doors, confirm that air-tightness, water-tightness, and wind resistance testing has been performed.
How does a 90-inch door affect installation compared to a standard 80-inch door?
The taller door requires a larger rough opening, heavier-duty hinges or pivot hardware, and more precise framing to prevent racking. The additional weight and leverage mean standard hardware may not be adequate. Confirm hardware specifications with the manufacturer before ordering.
