What Types of WPC Doors Are There and How to Identify Them

WPC (Wood Plastic Composite) doors are becoming more and more common in residential and commercial applications due to their excellent durability, waterproof properties, termite resistance, and eco-friendliness. However, not all WPC doors are made the same. In fact, WPC doors come in various types based on their structure and materials.

In this article, we will introduce the four main categories of WPC doors:

1. WPC Full Door (WPC Hollow Doors)
2. WPC Assembly Door
3. WPC Filling Door (PVC door)
4. WPC Panel Door (WPC Fence Gates)

We will also explain their differences, material composition, uses, and how to identify them properly, while preserving all details from both the original and newly provided content.

Overview of Categories

WPC doors are mainly divided into:

1. WPC Full Door (WPC Hollow Doors)
2. WPC Assembly Door
3. WPC Filling Door (PVC door)
4. WPC Panel Door (WPC Fence Gates)

Among them, WPC hollow doors, WPC assembly doors, and WPC infill doors are typically used as interior doors, corridor doors, or outdoor doors (with sun protection treatment). In contrast, WPC Panel Doors (WPC Fence Gates) are mainly used for courtyard or garden applications.

In terms of material composition, the first three door types (hollow, assembly, infill) use PVC-based WPC materials with more than 70% PVC, making them highly waterproof and strong.
In comparison, WPC Panel Doors are made from WPC fence boards with more than 70% wood powder and assembled with metal frames. These are structurally and functionally different and more suitable for outdoor use, but some buyers still refer to them as “WPC doors.”

1. WPC Hollow Doors

Structure:

• 100% WPC material
• Extruded in hollow-core format through a WPC extrusion machine
• Internal cavities improve strength, sound insulation, and heat insulation

Surface Treatment:

• Spray paint finish: More upscale look
• PVC film coating: Wider selection of surface designs

Appearance Customization:

• Allows for shallow carving patterns, decorative strips, and modern or classic finishes

Advantages:

• High structural stability
• Fully waterproof and termite-proof
• Excellent for both interior and protected exterior use

Cost Consideration:

• More expensive than WPC infill doors due to the high amount of WPC material used

Warning:

Some hollow WPC doors on the market are extremely thin and weak, with wall thicknesses so low they can be pierced with a finger.
These are not real WPC hollow doors by industry standards. Their performance is worse than even MDF doors. If a quotation is very low, double-check the wall thickness and materials used.

2. WPC Assembly Doors

Structure:

• Constructed by assembling multiple WPC parts (rails, stiles, panels)
• Not extruded as a single piece

Surface Treatment:

• Typically finished with PVC film coating

Advantages:

• Can overcome extrusion mold size limits
• Customizable in height, width, and style
• Suitable for simple classic shaker door designs

Disadvantages:

• Higher cost due to more complicated assembly process
• Style options are usually limited to rectangular patterns

Use Case:

• Ideal for classic interior doors or when custom sizing is required

3. WPC Infill Doors (Best Seller)

Structure:

• 2 pieces of 2mm WPC door skins
• Frame: composite wood or WPC
• Filler core inside

Filler Options:

• PU foam (most recommended): Excellent flame retardancy, strength, and sound insulation
• XPS foam: Good alternative to PU
• Fireproof honeycomb paper
• Particle board / solid wood composite board (less common)

Market Position:

• Best-selling type due to great performance + reasonable price
• Structure similar to MDF and fireproof doors, but stronger and more water-resistant

Common Confusion:

Some customers mistakenly refer to WPC infill doors as:

• PVC door
• UPVC door
• New PVC door
• New WPC door

⚠️ Clarification: These are incorrect terms. PVC/UPVC doors are early-generation plastic steel doors that are lightweight, thin, and used mainly in toilets. In contrast, WPC infill doors are far more durable and versatile.

4. WPC Panel Doors (WPC Fence Gates)

Although technically made from WPC materials, WPC Panel Doors — or WPC Fence Gates — are not typical WPC interior doors and should not be confused with them.

Structure:

• Made by cutting and joining WPC fence boards
• Encased in aluminum alloy frames
• Locks, handles, and hinges are installed on the metal frame

Material Composition:

• Over 70% wood powder content
• Less waterproof than other WPC door types
• Higher water absorption rate

Use Case:

• Outdoor applications: courtyard gates, garden entrances, backyard doors

Cost:

• Lower material cost due to the high wood content

Note:

Although different in function and performance, some buyers refer to these as “WPC doors”, so they are included in this article.

5. What About WPC Foam Board Doors?

There is another type of WPC door you might see online, especially in India. These are made from low-density WPC foam boards, which are:

• Cut, carved, and painted
• Not very strong
• Not suitable for international use due to low structural strength

These doors are not listed as a core type in this article, but we mention them to clarify confusion, as you may see them sold under the name “WPC door.”

How to Identify Different Types of WPC Doors

Here are some tips to distinguish between real WPC doors and low-quality alternatives:

• Check Wall Thickness: Hollow WPC doors should feel strong and substantial
• Tap Test: A genuine WPC door should not sound overly hollow or flimsy
• Examine the Edges: Real WPC has a uniform composite material without gaps
• Ask About Fillers: Know what’s inside — PU and XPS foam are ideal
• Look for Frame Material: WPC or composite wood is stronger than plain plastic
• Inspect Surface Finish: High-quality WPC doors have smooth spray paint or thick PVC laminates

Summary Table

Type	Use Case	Material Base	Price Level	Strength	Notes
WPC Hollow Door	Interior / Exterior	100% WPC (70%+ PVC)	High	Very High	Watch for ultra-thin low-quality versions
WPC Assembly Door	Custom Interior	100% WPC (70%+ PVC)	Medium-High	High	Custom sizes, classic shaker-style doors
WPC Infill Door	Interior Use	WPC skin + foam core	Medium	Medium-High	Best seller; strong, cost-effective, recommended PU core
WPC Panel Door	Outdoor / Courtyard	70%+ wood, aluminum frame	High	Medium	Outdoor-only; higher water absorption; not house-door grade

Final Conclusion

Understanding the types and construction of WPC doors is essential for choosing the right one. Whether you’re sourcing for residential, commercial, or outdoor projects, make sure to verify the materials, fillers, frame structure, and surface finish.

• For maximum strength and durability, choose WPC Hollow Doors.
• For custom sizing and classic styles, go with WPC Assembly Doors.
• For value and practicality, WPC Infill Doors are your best bet.
• For gardens and courtyards, WPC Panel Doors (Fence Gates) are an appropriate solution.

If you come across unfamiliar door types or suspiciously low prices, always ask detailed questions or request samples to verify quality.