WPC Door Fire Rating: B1(C) Fire Performance Test Results from Zonle Doors
Fire safety is an important consideration when selecting interior doors for residential, commercial, and public buildings. Compared with traditional wooden doors, WPC doors (Wood Plastic Composite doors) offer better moisture resistance, dimensional stability, and enhanced fire performance.
To verify the fire safety performance of our WPC door panels, the product has been tested according to GB/T 20284-2006 Building Materials or Products Single Burning Item Test. The test results demonstrate that the WPC door achieves B1(C) fire performance classification, meeting the requirements for flame spread control and heat release performance. (Nationalpublic service platformfor standards information)
What Is B1(C) Fire Rating for WPC Doors?
In China’s building material fire classification system, B1 grade represents flame-retardant building materials with limited combustibility.
For WPC doors, achieving a B1(C) rating means the material has demonstrated:
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Limited flame growth during fire exposure
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Controlled heat release
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No burning droplets that could spread fire
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Reduced risk of rapid flame propagation
The classification is evaluated through standardized fire tests, including parameters such as:
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FIGRA (Fire Growth Rate Index)
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THR600s (Total Heat Release within 600 seconds)
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Flame spread behavior
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Burning droplets performance
GB/T 20284-2006 is the standard method for evaluating the reaction-to-fire performance of building products through a Single Burning Item (SBI) test. (bzpt.com)
WPC Door Fire Test Results
According to the fire performance test report, the tested WPC door sample achieved B1(C) fire performance classification under GB/T 20284-2006. The results demonstrate controlled flame spread, limited heat release, and reliable fire safety performance.
| Test Item | Requirement | Test Result | Result |
|---|---|---|---|
| Fire Growth Rate Index (FIGRA₀.₄MJ) | ≤250 W/s | 216 W/s | Pass |
| Flame Lateral Spread | Not reach sample edge | Meets requirement | Pass |
| Total Heat Release (THR₆₀₀s) | ≤15 MJ | 10.5 MJ | Pass |
| Flame Height within 60s (Fs) | ≤150 mm | <150 mm | Pass |
| Burning Droplets | No burning droplets | Meets requirement | Pass |
The test sample thickness was approximately 45mm, representing the actual WPC door structure used in production.
Original WPC Door B1(C) Fire Rating Test Report
The original test report is provided for reference. Please contact Zonle Doors for detailed certification documents.
WPC Door Fire Test Sample Before and After Testing
Why Fire Performance Matters for WPC Doors
For architects, contractors, and door distributors, fire performance is a key factor when selecting interior door materials.
A WPC door with improved fire resistance provides advantages in:
1. Safer Building Applications
WPC doors can be used in projects where fire safety requirements are important, including:
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Residential buildings
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Hotels
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Apartments
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Offices
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Schools
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Commercial interiors
2. Better Alternative to Traditional Wood Doors
Traditional wooden doors are naturally combustible. WPC doors combine polymer materials with wood fiber components and can achieve improved fire performance through optimized material formulations.
Compared with ordinary wood doors, WPC doors offer:
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Better moisture resistance
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Higher dimensional stability
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Resistance to termites
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Easier maintenance
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Improved fire behavior
WPC Door Structure and Fire Performance
The fire performance of a WPC door depends on multiple factors:
Door Core Material
The internal structure affects heat release and flame propagation. A stable WPC core helps improve overall fire performance.
Material Formula
Fire-retardant additives and optimized WPC formulations can reduce flame spread and heat release.
Door Thickness
A thicker door structure generally provides better thermal resistance compared with thinner panels.
Manufacturing Quality
Consistent extrusion, density control, and production technology are essential for maintaining stable fire performance.
Applications of B1(C) Fire Rated WPC Doors
With reliable fire performance and excellent durability, WPC doors are suitable for:
Residential Projects
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Apartments
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Villas
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Housing developments
Hospitality Projects
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Hotels
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Resorts
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Guest rooms
Commercial Buildings
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Office buildings
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Shopping centers
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Public facilities
Export Projects
For international buyers, fire performance testing provides additional confidence when sourcing WPC doors from China manufacturers.
Why Choose Zonle WPC Doors?
As an experienced WPC door manufacturer, Zonle Doors focuses on providing reliable OEM and customized door solutions for global markets.
Our WPC doors feature:
- Factory-direct manufacturing
- Custom sizes and designs
- Stable quality control
- Moisture-resistant structure
- Fire performance testing support
- OEM & ODM service for distributors and contractors
With professional production capabilities, we help international partners develop durable and cost-effective WPC door solutions.
WPC Door Frequently Asked Questions
Are WPC doors fire resistant?
Yes. WPC doors can achieve improved fire performance through optimized material formulas and manufacturing processes. Specific fire ratings depend on product structure and testing standards.
What fire rating does a WPC door have?
The tested WPC door sample achieved B1(C) fire performance classification, according to the provided fire test report.
Are WPC doors safer than wooden doors?
WPC doors generally provide better moisture resistance and improved fire behavior compared with ordinary wooden doors.
Can WPC doors be used for commercial projects?
Yes. WPC doors are widely used in residential, hospitality, and commercial interior applications.