EN 13501-1 B-s1,d0 Explained: EU Fire Rating for PVC Wall Panels
EN 13501-1 is the harmonized European classification standard for the reaction-to-fire performance of construction products. For PVC wall panels covered by a harmonised European standard or European Technical Assessment under the Construction Products Regulation (CPR, EU 305/2011), fire performance must be classified according to this standard. The classification B-s1,d0 is a commonly specified Euroclass rating for commercial interior wall panel applications, though the required classification depends on the country, building type, location, and intended use.
This guide explains the EN 13501-1 classification system in depth, with a specific focus on what B-s1,d0 means for PVC wall panel procurement. We cover the test methodology, EU building code requirements by country, how to read and verify classification reports, and common specification mistakes that lead to failed inspections.
1. What Is EN 13501-1 and Why It Matters
EN 13501-1 is part of the EN 13501 series of standards that classify the fire performance of construction products in Europe. The series covers several aspects:
- EN 13501-1: Reaction to fire classification (how a material responds when exposed to fire)
- EN 13501-2: Fire resistance classification (how long a structural element holds integrity under fire)
- EN 13501-3: Fire resistance for service ducts
- EN 13501-5: Roofs exposed to external fire
For PVC wall panels used as interior finishes, EN 13501-1 is the relevant standard. It classifies products based on their reaction-to-fire performance — meaning how the material ignites, spreads flame, produces smoke, and forms flaming droplets when exposed to fire.
Under CPR (Regulation EU 305/2011), construction products covered by a harmonised European standard or European Technical Assessment placed on the EU market must carry CE marking and be accompanied by a Declaration of Performance (DoP). For products where reaction-to-fire is a declared characteristic, the applicable fire performance is classified according to EN 13501-1. A supplier who provides a non-EU fire test (like GB 8624 or ASTM E84) as a substitute for EN 13501-1 classification is not compliant with EU requirements for that characteristic.
EN 13501-1 was developed to replace the patchwork of national fire classification systems that previously existed across EU member states (DIN 4102 in Germany, NF P 92 in France, BS 476 in the UK, etc.). The goal was a single, harmonized system where a product tested in one EU country carries the same classification in all member states. The current version is EN 13501-1:2018, which was published in December 2018 and replaced the 2007 version.
2. The Euroclass System: A1 Through F
EN 13501-1 classifies construction products into seven main classes based on their contribution to fire. The system ranks from A1 (highest performance, no contribution to fire) to F (no performance determined):
| Class | Description | Typical Products | Test Methods |
|---|---|---|---|
| A1 | No contribution to fire growth, fully non-combustible | Stone, ceramic, glass, metal | EN ISO 1182 (non-combustibility) + EN ISO 1716 (calorific value) |
| A2 | No significant contribution to fire growth | Mineral wool boards, gypsum boards, cement-based panels | EN ISO 1182 or EN ISO 1716 + EN 13823 (SBI) |
| B | Limited contribution to fire growth | PVC wall panels (commonly targeted class), flame-retardant treated wood, some plasterboard composites | EN 13823 (SBI) + EN ISO 11925-2 (small flame) |
| C | Minor contribution to fire growth | Treated wood, medium-density composites | EN 13823 (SBI) + EN ISO 11925-2 |
| D | Acceptable contribution to fire growth | Untreated wood, some plastics | EN 13823 (SBI) + EN ISO 11925-2 |
| E | Acceptable reaction to fire (limited flame resistance) | Some basic plastics | EN ISO 11925-2 |
| F | No performance determined | Unclassified or untested materials | — |
For interior wall finish applications in commercial buildings, Class B and Class C are the most commonly specified. Class B is the higher-performing of the two and is typically required for escape routes, corridors, stairwells, and high-occupancy areas. Class C may be acceptable for rooms with lower occupancy or where sprinkler protection reduces the risk.
Standard PVC wall panels achieve Class B, not A1 or A2. Class A2 requires materials that are essentially non-combustible — measured by the non-combustibility test (EN ISO 1182) and calorific value test (EN ISO 1716). PVC, as a polymer, inherently has a calorific value above the A2 threshold. If your project specifically requires A2, you would need a mineral-based panel or a specially formulated composite. However, for many commercial interior wall applications, B-s1,d0 is a commonly specified rating and may be sufficient — always confirm with your project requirements.
3. Decoding B-s1,d0: What Each Component Means
The classification B-s1,d0 is actually three separate classifications combined into one designation. Each component addresses a different aspect of fire performance that is relevant to interior wall panel applications:
The Main Class: B
The letter B indicates the product’s main reaction-to-fire class. In the Euroclass system, Class B means the product has a limited contribution to fire. Key parameters considered in the SBI classification include:
- FIGRA (Fire Growth Rate Index) — the rate at which heat release accelerates; Class B threshold is ≤ 120 W/s
- THR600s (Total Heat Release over 600 seconds) — total energy released; Class B threshold is ≤ 7.5 MJ
- When tested under EN ISO 11925-2, flame spread must not exceed 150mm within 60 seconds of exposure
The classification is determined through the complete test procedure and classification rules of EN 13501-1, not by individual threshold values alone. Class B sits between A2 (no significant fire contribution) and C (minor fire contribution). For context, untreated wood typically achieves Class D, and flame-retardant-treated wood may achieve Class B or C.
The Smoke Class: s1
The s1 designation addresses smoke production during fire. This is a critical parameter for interior wall panels because smoke is the primary cause of fatalities in building fires, and visibility in escape routes during evacuation can be the difference between life and death.
EN 13501-1 defines three smoke classes:
| Smoke Class | SMOGRA Threshold | TSP600s Threshold | Meaning |
|---|---|---|---|
| s1 | ≤ 30 m²/s² | ≤ 50 m² | Absence or very limited smoke production |
| s2 | ≤ 180 m²/s² | ≤ 200 m² | Limited smoke production |
| s3 | No limit | No limit | No performance determined (high smoke) |
For B-s1,d0, the s1 designation requires both SMOGRA ≤ 30 and TSP600s ≤ 50. These are the most stringent smoke thresholds in the Euroclass system. For PVC wall panels used in escape routes, hotel corridors, hospital wards, and other evacuation-critical spaces, s1 may be required depending on national and project-specific requirements — always confirm with local building codes.
PVC can produce less visible smoke than some polymers (like polystyrene) but still generates smoke when it burns, including hydrogen chloride gas. The s1 classification confirms that the specific panel formulation has been tested and meets the low-smoke thresholds. Factors such as filler content, flame retardant additives, and surface film selection all influence smoke production. A panel with a generic formulation may achieve Class B but only reach s2 or s3. The actual fire and smoke performance must be verified on the finished product through applicable testing — formulation assumptions are not a substitute for test results.
The Droplets Class: d0
The d0 designation addresses flaming droplets and particles — material that melts, drips, and carries flame as it falls. This parameter is critical for wall and ceiling panels because flaming droplets can ignite materials below and spread fire vertically through a space.
EN 13501-1 defines three droplet classes:
| Droplet Class | Criteria | Meaning |
|---|---|---|
| d0 | No flaming droplets/particles within 600 seconds | No flaming material falls from the product during testing |
| d1 | No flaming droplets/particles persisting longer than 10 seconds | Droplets form but self-extinguish quickly |
| d2 | No performance determined | Droplets persist or no testing performed |
For wall and ceiling applications, d0 is commonly specified. PVC wall panels that achieve d0 demonstrate that even under fire exposure, the material does not produce flaming droplets that could spread fire downward. This is particularly important for ceiling installations and wall panels installed above combustible materials.
4. The SBI Test (EN 13823): How Classification Is Determined
The Single Burning Item (SBI) test, specified in EN 13823, is the core test method for Euroclass B through D. It simulates the scenario of a single burning item — like a burning wastebasket — in the corner of a room where two walls meet. The test evaluates how a wall or ceiling product contributes to fire growth in this realistic room-corner fire scenario.
Test Setup
The SBI test apparatus consists of a small room enclosure with two perpendicular wings forming a corner. The test specimen is mounted on these wings:
- Long wing: 1000mm × 1500mm
- Short wing: 495mm × 1500mm
- A sandbox burner (17kW propane flame) is placed in the corner between the two wings
- The burner is ignited and the test runs for 20 minutes
During the test, instruments measure heat release rate (HRR), smoke production rate (SPR), and observe whether flaming droplets fall from the specimen.
Key Measured Parameters
The SBI test produces four critical parameters that determine the Euroclass:
| Parameter | Full Name | What It Measures | Class B Threshold |
|---|---|---|---|
| FIGRA | Fire Growth Rate Index | Rate at which heat release increases — how quickly the fire escalates | ≤ 120 W/s |
| THR600s | Total Heat Release over 600s | Total energy released during the first 10 minutes | ≤ 7.5 MJ |
| SMOGRA | Smoke Growth Rate Index | Rate at which smoke production increases | ≤ 30 m²/s² (for s1) |
| TSP600s | Total Smoke Production over 600s | Total smoke volume produced during first 10 minutes | ≤ 50 m² (for s1) |
PVC’s chlorine content (approximately 57% by mass) can contribute to flame resistance, but fire performance depends on the complete panel formulation, thickness, surface finish, and manufacturing process. The actual Euroclass rating must be confirmed through testing and classification of the finished product. Without proper formulation optimization, PVC can generate significant smoke, potentially pushing SMOGRA above the s1 threshold. Always request the specific EN 13501-1 classification report for the exact product being supplied.
5. EN ISO 11925-2: The Small Flame Ignition Test
In addition to the SBI test, Class B through E require passing the EN ISO 11925-2 small flame ignition test. This test evaluates whether the product ignites when exposed to a small flame — simulating a localized ignition source like a candle, match, or lighter.
How the Test Works
- A small test specimen (typically 250mm × 90mm) is mounted vertically
- A flame from a standardized burner is applied to the surface for 30 seconds
- The test is performed twice: once with the flame applied to the surface, and once with the flame applied to the edge
- The flame spread is observed for 60 seconds after the flame is removed
Pass Criteria for Class B
For Class B, the product must meet all of the following:
- Flame spread does not exceed 150mm from the point of flame application within 60 seconds
- No flaming droplets are produced
- The specimen does not ignite (or if it does, it self-extinguishes within the time limit)
This test is relatively straightforward but catches products that might perform well in the SBI test but are vulnerable to small ignition sources. For PVC wall panels, the high chlorine content and self-extinguishing behavior typically make this test easy to pass — but edge ignition can be a vulnerability if the panel has a thin surface film that burns readily.
6. How PVC Wall Panels Achieve B-s1,d0
Achieving B-s1,d0 is not automatic — it depends on the panel’s formulation, construction, and manufacturing quality. Understanding these factors helps buyers ask the right questions when evaluating suppliers.
Six Key Factors
| Factor | How It Affects Fire Performance | What to Ask Your Supplier |
|---|---|---|
| Panel thickness | Thicker panels resist flame penetration better. SBI testing is done on the full finished panel at its specified thickness. | “What thickness was the SBI test sample?” — it must match your procurement spec |
| Flame retardant additives | Flame retardant additives can enhance flame retardancy. The type and loading affect both fire class and smoke production. | “What flame retardant system is used and at what loading?” |
| Calcium carbonate filler | Filler content dilutes the combustible polymer fraction, reducing heat release and improving fire performance. | “What is the filler ratio in the formulation?” |
| Plasticizer type and content | Plasticizers can reduce fire performance. The type and loading affect both fire class and smoke production. | “What plasticizer system is used?” |
| Surface film | The UV-printed or laminated surface film is part of the tested assembly. Different film formulations affect flame spread and smoke differently. | “Was the test conducted on the finished panel with surface film, or the raw substrate?” |
| Density | Higher density panels typically perform better in fire tests due to more material per unit volume and better heat dissipation. | “What is the panel density (g/cm³)?” |
Some suppliers imply that all PVC wall panels inherently achieve B-s1,d0. This is not accurate. While PVC’s chemistry provides a good foundation, the actual rating depends on the formulation, thickness, and manufacturing process. Panels with high plasticizer content, low filler ratios, or certain surface films may achieve only Class C or D. Always request the specific EN 13501-1 test report and verify that the tested sample matches your procurement specification.
7. Why Smoke (s1) and Droplets (d0) Matter for Wall Panels
The main Euroclass letter (B) gets the most attention, but the smoke and droplets sub-classifications can be equally important — especially for interior wall panel applications. Here is why:
Smoke (s1): Evacuation Visibility
In a building fire, smoke kills more people than flames. Reduced visibility in corridors and stairwells directly affects evacuation time. The s1 classification ensures that the wall panel material produces very low smoke during fire exposure, maintaining visibility in escape routes.
EU building codes typically require s1 for wall and ceiling finishes in:
- Escape corridors and stairwells
- Hotel guestroom corridors
- Hospital wards and patient areas
- School classrooms and assembly halls
- Underground and enclosed spaces
For these applications, a panel achieving B-s2,d0 (which has higher smoke production) would not meet code requirements, even though it has the same main class (B) for fire contribution.
Droplets (d0): Fire Spread Prevention
Flaming droplets are material that melts, drips, and continues to burn as it falls. In a wall panel context, flaming droplets can:
- Ignite combustible materials (furniture, flooring) below the panel
- Spread fire vertically from wall to floor or ceiling to wall
- Create secondary ignition sources away from the original fire
The d0 classification confirms that no flaming droplets are produced within 600 seconds of fire exposure. For ceiling-mounted panels and wall panels above combustible materials, d0 is typically mandatory.
Consider a hotel corridor fire scenario. If wall panels achieve B-s1,d0, the corridor maintains low smoke for evacuation and no flaming material falls to ignite carpeting or furniture. If the same panels were only B-s2,d1, the corridor could fill with smoke much faster, and flaming droplets could spread fire along the corridor floor. The difference between s1/s2 and d0/d1 can literally be the difference between safe evacuation and a catastrophic outcome — which is why EU building codes are specific about these sub-classifications.
8. EU Building Code Requirements by Country
While EN 13501-1 provides a harmonized classification system, each EU member state sets its own building code requirements specifying which Euroclass is required for which application. Below is a reference guide to the relevant regulations in major EU markets:
| Market | Reference Regulation | Important Note |
|---|---|---|
| Germany | Musterbauordnung (MBO) / state building codes referencing EN 13501-1 | Requirements depend on building type, application (wall vs. ceiling), and escape route classification |
| France | French fire safety regulations for public buildings | National requirements may apply in addition to Euroclass; verify specific application |
| Spain | CTE DB-SI (Código Técnico de la Edificación) | Check the specific application, occupancy, and installation conditions |
| Italy | DM 3 agosto 2015 (fire safety code) | Requirements vary by building category and use |
| Netherlands | Bouwbesluit 2012 | Verify specific application and building function |
| Poland | Technical conditions regulation | Confirm requirements for specific building type and fire zone |
The requirements above are general guidelines based on commonly referenced building codes. Actual requirements vary by building type (residential vs. commercial vs. public assembly), occupancy load, sprinkler status, ceiling height, and specific room application. Some countries have additional national requirements (like France’s M-class system alongside Euroclass). Always verify the specific requirement with your project’s fire consultant, building control officer, or local fire authority.
UK Note: Post-Brexit Status
Following Brexit, the UK still uses EN 13501-1 as the basis for fire classification under the Building Regulations 2010 (Approved Document B). The classification system remains harmonized with the EU standard. However, the UK has introduced stricter requirements following the Grenfell Tower inquiry — particularly for high-rise residential buildings, where A2-s1,d0 is now required for external walls. For interior wall finishes in standard commercial buildings, B-s1,d0 remains the typical requirement.
9. Fire Rating Requirements in Commercial Projects
Fire rating requirements for PVC wall panels vary by project type and occupancy classification. The table below summarizes typical requirements across common commercial applications:
| Project Type | Room Walls | Corridor Walls | Corridor Ceilings |
|---|---|---|---|
| Hotels | C-s2,d0 minimum | B-s1,d0 | B-s1,d0 or A2-s1,d0 |
| Hospitals | B-s1,d0 | B-s1,d0 | A2-s1,d0 (some areas) |
| Offices | C-s2,d0 | B-s1,d0 | B-s1,d0 |
| Retail | C-s2,d0 | B-s1,d0 | B-s1,d0 |
| Schools | B-s1,d0 | B-s1,d0 | B-s1,d0 or A2-s1,d0 |
| Residential (multi-family) | C-s2,d0 | B-s1,d0 | B-s1,d0 |
For B2B buyers, the practical implication is that B-s1,d0 is a commonly specified rating for PVC wall panels in many commercial corridor and common-area applications, but always confirm the exact requirement with your project’s fire consultant or local building authority. Specifying a lower classification without verifying code compliance may result in failed inspections, costly replacement, and project delays.
10. How to Read an EN 13501-1 Classification Report
An EN 13501-1 classification report (also called a classification report) is different from a test report. The classification report references the underlying test data and declares the Euroclass. Here is what to look for:
Essential Fields on a Valid Classification Report
| Field | What to Verify | Red Flag |
|---|---|---|
| Notified Body name and number | Must be issued by an EU Notified Body authorized for construction product assessment | No EU Notified Body reference; report from a non-EU accredited lab only |
| Classification | Must show full notation: B-s1,d0 (not just “Class B”) | Only shows “B” without smoke and droplets sub-classes |
| Standard reference | Must cite EN 13501-1:2018 (or at minimum 2007+A1:2009) | Cites only GB 8624 or ASTM E84 |
| Product identification | Product name, code, thickness, and surface finish must match your purchase spec | Generic description without product code or thickness |
| Test reference | Must reference EN 13823 (SBI) and EN ISO 11925-2 test reports | Only references one test method |
| Application | Should specify “wall” or “ceiling” or both | No end-use application stated |
| Report date and signature | Signed by authorized person at the Notified Body | No signature, no Notified Body stamp |
The Difference Between a Test Report and a Classification Report
- Test report: Contains raw test data — FIGRA, THR600s, SMOGRA, TSP600s values, photos, test conditions. Issued by a testing laboratory.
- Classification report: References the test reports and declares the Euroclass (e.g., B-s1,d0). Issued by a Notified Body or recognized certification organization.
For CE marking and Declaration of Performance purposes, the classification report provides important evidence for the declared reaction-to-fire performance. However, CE marking and the DoP depend on the applicable CPR route and assessment system, which may also require factory production control, notified body involvement, and compliance with the relevant harmonised European standard. The underlying test reports provide the detailed data that allows you to verify the margins — for example, whether the product passed B with comfortable margin or barely met the threshold.
Every EU Notified Body has a four-digit identification number that appears on the classification report and on the CE marking. You can verify the Notified Body at the European Commission’s NANDO database (ec.europa.eu/growth/tools-databases/nando/). Search the number, confirm the body is specifically notified for the relevant construction-product assessment task and scope, and cross-check the report number by contacting the Notified Body directly.
11. EN 13501-1 vs ASTM E84 vs GB 8624
If you source PVC wall panels from China and sell into the EU market, you will likely encounter all three standards. Understanding how they relate helps you avoid the trap of accepting one standard’s report when the project requires another.
| Parameter | EN 13501-1 (EU) | ASTM E84 (US/Canada) | GB 8624 (China) |
|---|---|---|---|
| Test method | SBI (EN 13823) + small flame (EN ISO 11925-2) | Steiner Tunnel (25-foot tunnel) | SBI (GB/T 20284) + small flame (GB/T 8626) |
| Classification | A1–F, with s1–s3 and d0–d2 | Class A / B / C | A1 / A2 / B1 / B2 / B3 |
| PVC panel target | B-s1,d0 | Class A (FSI ≤ 25) | B1 |
| Smoke measurement | SMOGRA + TSP600s (explicit sub-class) | SDI (Smoke Developed Index) | Smoke parameters within SBI |
| EU legal status | Harmonized standard, mandatory under CPR | Not accepted as substitute | Not accepted as substitute |
EN 13501-1, ASTM E84, and GB 8624 use fundamentally different test methods and classification systems. Passing one does not automatically qualify for another. The EU Construction Products Regulation requires classification according to EN 13501-1 by an EU Notified Body or a laboratory recognized under the European accreditation framework. A report issued under GB 8624 or ASTM E84 — regardless of which country the laboratory is located in — will not satisfy EU CPR requirements for reaction-to-fire classification. For products entering the EU market, EN 13501-1 testing is required.
Practical Sourcing Strategy
For buyers sourcing PVC wall panels from China for EU projects, the most efficient approach is to find a supplier who has already invested in EN 13501-1 testing through an EU Notified Body. Many larger Chinese manufacturers have recognized that EU market access requires this investment and have obtained classification reports from TÜV, SGS, or Bureau Veritas with EU Notified Body status.
Alternatively, you can commission testing yourself through an EU Notified Body that has testing partners in China. This reduces shipping costs while ensuring the classification is issued by an authorized body.
12. Common Mistakes When Specifying B-s1,d0
Based on our experience with B2B buyers sourcing PVC wall panels for EU commercial projects, these are the most common specification mistakes — and how to avoid them:
Mistake 1: Accepting a Non-EU Report as a Substitute
A supplier provides a GB 8624 B1 or ASTM E84 Class A report and says “it is equivalent to B-s1,d0.” It is not equivalent under EU law. The EU requires EN 13501-1 testing by a Notified Body. Accepting a non-EU report means you cannot legally place the product on the EU market for construction use, and your project will fail building control inspection.
Mistake 2: Ignoring the Smoke and Droplets Sub-Classes
A supplier provides a report showing “Class B” without specifying the smoke (s) and droplets (d) sub-classes. A “Class B” without sub-classes may mean s3 and d2 — the worst smoke and droplets performance. Always require the full notation: B-s1,d0. If the report only says “Class B,” ask for the complete classification including sub-classes.
Mistake 3: Not Verifying the Tested Thickness
The SBI test is conducted on a specific sample thickness. If your supplier’s report tests a 5mm panel and you are purchasing 3mm panels, the classification may not apply to your product. Check the classification report carefully to confirm that your product thickness and configuration fall within the tested or classified range. Classification reports may specify a range of thicknesses or a product family — verify that your specification is covered.
Mistake 4: Not Checking the Surface Finish
The SBI test is conducted on the finished product — including the surface film. If the supplier tested the raw PVC substrate without the printed marble film, the results may not reflect the actual product you receive. Confirm that the test was conducted on the finished panel with the surface film applied.
Mistake 5: Missing the Declaration of Performance
Even with a valid EN 13501-1 classification report, the product cannot be legally CE-marked and placed on the EU market without a Declaration of Performance (DoP). The DoP is a document where the manufacturer declares the product’s performance according to the harmonized standard. Always request both the classification report and the DoP.
Mistake 6: Assuming All Notified Bodies Are Equal
While all EU Notified Bodies are technically authorized, you should verify that the specific body is notified for the relevant construction-product assessment task and scope. Not every Notified Body is authorized for every standard or product area. Verify the Notified Body number on the NANDO database and confirm they are specifically authorized for the relevant assessment scope, not just for other construction product standards.
13. Procurement Checklist for EU Buyers
Use this checklist when evaluating PVC wall panel suppliers for EN 13501-1 compliance:
- Confirm your project’s fire rating requirement — Check the building code of the specific EU member state for the exact Euroclass required (main class + smoke + droplets) for your application (room wall, corridor wall, ceiling)
- Request the EN 13501-1 classification report — Not a test report, not a GB 8624 report, not an ASTM E84 report. The classification report must cite EN 13501-1 and declare a full classification (e.g., B-s1,d0)
- Verify the Notified Body — Check the four-digit Notified Body number on the European Commission NANDO database. Confirm the body is authorized for EN 13501-1.
- Check the tested thickness matches your spec — Verify that the classification report covers your product thickness and configuration; check the classified range, not just the tested sample
- Confirm the surface finish was tested — The test must cover the finished panel with surface film, not raw substrate
- Request the Declaration of Performance (DoP) — Mandatory for CE marking under CPR. Without it, the product cannot be legally placed on the EU market.
- Check the standard version — Current version is EN 13501-1:2018. Older reports citing the 2007 version may still be valid but check if your project requires the latest version.
- Verify product identification — Product name, code, and formulation on the report must match what you are purchasing
- Ask about formulation consistency — Confirm that the tested formulation is the same as the current production formulation. If the formulation has changed, a new test may be needed.
- Request CE marking documentation — CE marking must appear on the product or its packaging, accompanied by the DoP
Need EN 13501-1 B-s1,d0 PVC Wall Panels?
Contact Homax Decor to request EN 13501-1 classification reports, technical specifications, and Declarations of Performance for your EU commercial project. Test documentation is available for qualified buyers upon request.
Related Guides
- PVC Marble Wall Panel Fire Rating Guide: EN 13501, ASTM E84, GB 8624 Explained
- ASTM E84 Class A PVC Wall Panels: What North American Buyers Need to Know
- CE Certification for PVC Wall Panels: A Complete CPR Compliance Guide
14. Frequently Asked Questions
What does B-s1,d0 mean in EN 13501-1?
B-s1,d0 is a specific Euroclass fire rating. B means the product has limited contribution to fire. s1 means very low smoke production (SMOGRA below 30 and TSP600s below 50m²). d0 means no flaming droplets or particles were produced within 600 seconds of testing. This combination is a commonly specified fire rating for interior wall finishes in EU commercial building projects, though the required classification depends on the country, building type, and application.
How is EN 13501-1 different from ASTM E84?
EN 13501-1 uses the SBI (Single Burning Item, EN 13823) test and EN ISO 11925-2 small flame ignition test. ASTM E84 uses the Steiner Tunnel test measuring flame spread index and smoke developed index. The test methods, parameters, and classification systems are different. A panel that passes EN 13501-1 B-s1,d0 does not automatically qualify for ASTM E84 Class A. For projects in both markets, request testing under both standards.
Can a PVC wall panel achieve Class A (A2) under EN 13501-1?
Standard PVC wall panels typically achieve Class B, not A1 or A2. Class A2 requires non-combustible or nearly non-combustible materials, which is very difficult for polymer-based products. If your project requires A2, consider mineral-based panels or specially formulated fire-rated composites. However, for many commercial interior wall applications, B-s1,d0 is a commonly specified rating and may be sufficient — always confirm with your project requirements.
Is a GB 8624 B1 report accepted in the EU instead of EN 13501-1?
No. Under the EU Construction Products Regulation (CPR), products placed on the EU market must carry CE marking with performance declared under EN 13501-1. A GB 8624 B1 report does not satisfy EU requirements because it uses a different test method and classification system. You need testing conducted according to EN 13501-1 by an EU Notified Body or a laboratory recognized under the European accreditation framework. The two standards are not interchangeable — separate EN 13501-1 testing is mandatory for EU market access.
What is the SMOGRA threshold for Class s1?
For Class s1 under EN 13501-1, the SMOGRA (Smoke Growth Rate Index) must be below 30 m²/s² and the TSP600s (Total Smoke Production over 600 seconds) must be below 50 square meters. These thresholds ensure very low smoke production, which is critical for evacuation routes, enclosed corridors, and spaces where smoke visibility affects escape time.
Do I need a Declaration of Performance (DoP) for EN 13501-1?
Yes. Under the EU Construction Products Regulation (CPR, Regulation 305/2011), construction products covered by a harmonised European standard or European Technical Assessment must have a Declaration of Performance and carry CE marking. EN 13501-1 is the classification standard used to declare reaction-to-fire performance. Your supplier must provide a DoP declaring the fire classification and a CE-marked product. Without these, the product cannot be legally placed on the EU market for construction use.
About Homax Decor: CENCHER INDUSTRY SHANGHAI CO., LTD. (brand: Homax Decor) is a manufacturer of PVC marble wall panels, WPC wall panels, and SPC flooring. Selected Homax Decor products have been tested according to relevant international fire safety standards. Test documentation, including EN 13501-1 classification reports and Declarations of Performance, is available for qualified buyers upon request.
Disclaimer: This article is for informational purposes and does not constitute legal or regulatory advice. Building code requirements vary by EU member state, building type, and application. Always consult your local building control authority, fire consultant, or architect for project-specific requirements. EN 13501-1 classification reports and Declarations of Performance must be verified with the issuing Notified Body.
