GREENGUARD Gold vs FloorScore: Which VOC Certification Does Your Project Need?

If you supply PVC wall panels, SPC flooring or related interior building products to North American projects, you will encounter two VOC emission certifications: GREENGUARD Gold and FloorScore. Architects specify them in tender documents. Distributors ask for them in product data sheets. Green building rating systems like LEED and WELL award credits for them. Yet many buyers — and some suppliers — confuse the two, assume they are interchangeable, or do not realise that one of them does not even apply to wall panels.

This guide compares GREENGUARD Gold and FloorScore from the perspective of a PVC building product manufacturer. It explains what each certification covers, how the emission limits differ, which one is relevant to wall panels versus flooring, how to verify a claim, and how to decide which documentation your project actually requires.

This article is informational guidance, not legal or certification advice. Certification requirements depend on the specific product, project specification and applicable green building standard. Always confirm current requirements with the certification body and the project team.

1. Why VOC Certification Matters for PVC Building Products

Indoor air quality (IAQ) has become a standard line item in building product specifications, not an optional add-on. People spend roughly 90% of their time indoors, and the materials covering walls and floors are among the largest surface areas in a room. If those materials off-gas volatile organic compounds (VOCs) — such as formaldehyde, toluene, benzene or styrene — elevated concentrations of certain VOCs may be associated with indoor air quality concerns.

For PVC building products, the concern is real but often misunderstood. Rigid PVC wall panels typically use less plasticiser than flexible vinyl flooring, and for many rigid PVC products, VOC emissions may depend more heavily on the overall formulation and manufacturing process than on the PVC resin alone. Additives, stabilisers, pigments, surface films, decorative films, adhesives and printing inks can all contribute to the emissions profile. A product that “smells fine” in a warehouse may behave differently in a sealed, climate-controlled room. That is why independent, chamber-based emissions testing exists.

Two certifications dominate the North American market for building product VOC emissions:

• GREENGUARD Gold — issued by UL Solutions under the UL 2818 standard; covers a broad range of interior products including wall panels, furniture, paint, insulation and finishes.
• FloorScore — issued by SCS Global Services in partnership with the Resilient Floor Covering Institute (RFCI); primarily covers eligible hard-surface flooring products and related categories.

Both are voluntary, third-party certifications. Neither is a legal requirement in the way that CARB Phase 2 or TSCA Title VI are for formaldehyde. But both are widely recognised by LEED, WELL, CHPS and other green building rating systems, which means a missing certification can cost credits — and sometimes cost a project bid.

2. What Both Certifications Share

Despite their differences, GREENGUARD Gold and FloorScore are built on the same technical foundation. Understanding what they share makes the differences easier to grasp.

Common testing baseline

Both certifications reference the California Department of Public Health (CDPH) Standard Method v1.2-2017 — often called California Section 01350 — as the core testing framework. This method specifies dynamic environmental chamber testing: a product sample is placed in a sealed chamber with controlled temperature (23°C), humidity (50%) and air exchange rate, and emissions are collected over a period of days. The chamber models a realistic room environment — a classroom or a private office — so the results predict real-world exposure rather than a single snapshot.

Common target compounds

Both certifications screen for the same core list of VOCs defined in the CDPH method: formaldehyde, acetaldehyde, toluene, benzene, xylene, styrene, and other individual compounds with established health-based reference levels. The difference is how many compounds are screened and how strict the limits are — which is where GREENGUARD Gold pulls ahead.

Common accreditation requirements

Both require that testing be performed by a laboratory accredited under ISO/IEC 17025 for the relevant test methods. Third-party certification bodies must be accredited under ISO/IEC 17065. This means the testing chain is independently audited, not self-declared.

Common green building recognition

Both are recognised by the major North American green building rating systems:

Green Building Program	FloorScore	GREENGUARD Gold
LEED v4 / v4.1 (EQ Credit: Low-Emitting Materials)	Accepted (flooring category)	Accepted (all applicable categories)
WELL Building Standard (v2, Feature 04)	Accepted	Accepted
CHPS (Collaborative for High Performance Schools)	Accepted	Accepted
BREEAM	Accepted (IAQ credit)	Accepted
Green Globes (ANSI/GBI-2019)	Accepted	Accepted

Common ongoing compliance

Neither is a one-time test. Both programs require ongoing certification maintenance, which may include periodic product evaluation, surveillance, manufacturing controls and other renewal requirements. The exact frequency depends on the current program rules and product certification scope. A certificate that has lapsed is not valid documentation.

3. GREENGUARD Gold: Stricter Limits, Broader Scope

GREENGUARD Gold generally applies more stringent emission criteria for many indoor-use applications. It is issued by UL Solutions under the UL 2818 standard (Gold tier), and products are tested in accordance with the UL 2821 test method to demonstrate compliance with the emission limits defined in UL 2818.

Why it is stricter

GREENGUARD Gold sets lower maximum allowable predicted concentrations for key compounds than the CDPH baseline that FloorScore uses. It also screens a broader panel of individual VOCs — over 360 compounds — compared to the 35-plus compounds in the FloorScore programme.

Who it is designed for

GREENGUARD Gold was originally developed for sensitive environments: schools, healthcare facilities, nurseries and spaces used by children or sensitive individuals. The stricter limits reflect the assumption that occupants may be more vulnerable, or that the space may have higher density and lower ventilation. It is now widely specified for residential and commercial projects where indoor air quality is a priority.

What it covers

Unlike FloorScore, which is flooring-specific, GREENGUARD Gold covers a broad range of interior product categories, including:

• Building materials and finishes (wall panels, ceilings, insulation)
• Flooring
• Furniture and furnishings
• Paint, coatings and adhesives
• Textiles and bedding
• Electronic equipment
• Cleaning products

This breadth is critical: a project pursuing LEED v4.1 Low-Emitting Materials credits can use GREENGUARD Gold certification to demonstrate compliance across multiple product categories — not just flooring.

4. FloorScore: Flooring-Specific, Industry-Trusted

FloorScore was developed by the Resilient Floor Covering Institute (RFCI) in partnership with SCS Global Services. It certifies that a hard-surface flooring product meets the VOC emission criteria of California Section 01350 (CDPH Standard Method v1.2).

What it covers

FloorScore applies to:

• Luxury vinyl tile (LVT) and plank (LVP)
• Stone plastic composite (SPC) and WPC flooring
• Vinyl composition tile (VCT) and sheet vinyl
• Rubber flooring
• Laminate flooring
• Linoleum and cork flooring
• Flooring adhesives, underlayments and associated installation materials

Wall panels, ceilings, furniture, paint and insulation are generally outside the standard flooring scope of FloorScore. This is a scope limitation, not a quality limitation — FloorScore is rigorous within its category — but it means the certification is generally not the relevant one for PVC wall panel buyers unless they are also sourcing flooring from the same supplier.

How it is administered

The certification is governed by the SCS-EC-10.2 standard (Indoor Air Quality Performance). The process includes:

• Initial testing: a product sample is tested in a dynamic environmental chamber over a 14-day period (per CDPH Standard Method v1.2), measuring emissions for the listed VOCs.
• Manufacturing facility audit: an SCS auditor visits the factory to review the production process, quality control procedures, raw material records and change-control documentation.
• Ongoing surveillance: annual product re-testing plus periodic factory audits. If the product formulation, production line or key suppliers change, the manufacturer must notify the certification body and re-evaluate.

The initial certificate is valid for one year. After three consecutive years of compliance, the validity period can extend to 18 months with continued annual surveillance.

Why it is trusted

FloorScore is recognised by every major North American green building program, and it is the default IAQ certification cited in US commercial flooring specifications. For a flooring manufacturer, holding FloorScore is often a baseline expectation rather than a differentiator — many public procurement documents list it as a requirement, not a preference.

5. Side-by-Side Comparison

The most common question from buyers is: “Which one is stricter?” GREENGUARD Gold generally applies more stringent emission criteria for many indoor-use applications. However, the two programs have different product scopes, certification protocols and requirements, so they are not simply interchangeable. Here is a practical comparison.

Comparison Area	GREENGUARD Gold	FloorScore
Primary scope	Broad indoor products	Eligible flooring products
PVC wall panels	Potentially applicable	Generally not the standard scope
Flooring	Applicable	Primary focus
TVOC limit	220 µg/m³ (0.22 mg/m³)	500 µg/m³ (0.5 mg/m³ per CDPH)
Formaldehyde limit	9 µg/m³ (7.3 ppb)	Per CDPH Standard Method v1.2
Individual VOCs screened	360+ compounds	35+ compounds per CDPH method
Emission criteria	Broader certification criteria with stricter limits for sensitive environments	Flooring-focused criteria per CDPH method
Designed for	Sensitive environments: schools, healthcare, children	General commercial and residential flooring
Certification body	UL Solutions	SCS Global Services (with RFCI)
Ongoing maintenance	Periodic evaluation, surveillance and factory audits	Periodic evaluation, surveillance and factory audits
Public verification database	spot.ul.com	scscertified.com

GREENGUARD Gold generally applies lower TVOC limits and screens a broader panel of individual VOCs. However, the two programs have different product scopes, certification protocols and requirements. Compliance with one program should not automatically be interpreted as certification under the other — a product certified under GREENGUARD Gold does not automatically hold FloorScore certification, and vice versa.

6. The Wall Panel Question: Why Scope Matters

Here is the point that causes the most confusion in real procurement conversations: FloorScore is generally not the appropriate certification for wall panels.

FloorScore is a certification programme for hard-surface flooring and flooring adhesives. Its scope, as defined by RFCI and SCS Global Services, covers resilient flooring, laminate, rubber, linoleum, cork and associated installation materials. Wall panels are a separate product category — they are wall finishes, not flooring.

GREENGUARD Gold, by contrast, explicitly covers wall panels as a product category within its broader scope. Under UL 2818, wall finishes and interior building materials are among the product types that can be certified. This makes GREENGUARD Gold the relevant VOC certification for PVC wall panel manufacturers and buyers.

Why this matters for LEED v4.1

LEED v4.1 organises the Low-Emitting Materials credit into eight product categories:

1. Paints and coatings
2. Adhesives and sealants
3. Floors
4. Wall panels
5. Ceilings
6. Insulation
7. Furniture
8. Composite wood

Floors and wall panels are separate categories. A flooring certification (FloorScore) does not satisfy the wall panel category. A GREENGUARD Gold certification can satisfy both — if the specific product line has been tested and certified under the standard.

7. Green Building Credits: LEED, WELL, CHPS

Both certifications contribute to green building credits, but the specifics depend on the rating system and product category. Here is how they fit into the three most commonly encountered programmes.

LEED v4 / v4.1 — EQ Credit: Low-Emitting Materials

The LEED Low-Emitting Materials credit requires products to be tested according to CDPH Standard Method v1.2-2017 and comply with the VOC limits in Table 4-1 of the method. Since November 2020, USGBC requires that documentation be less than three years old (measured from the testing date to the date the product is installed on the project).

Key requirements:

• 75–90% of products by cost or surface area must be compliant within each category.
• Each layer of an assembly (e.g., underlayment and finish flooring) must be compliant separately.
• Laboratories must be ISO/IEC 17025 accredited; certification bodies must be ISO/IEC 17065 accredited.
• These certifications may be used as third-party evidence to support compliance with applicable low-emitting materials requirements, subject to the current LEED version, product category and project documentation requirements. Certification alone does not guarantee that a product will earn a specific LEED credit.

For wall panel products specifically, GREENGUARD Gold is generally the more relevant certification path. FloorScore does not contribute to the wall panel category in LEED v4.1.

WELL Building Standard v2 — Feature 04: VOC Reduction

WELL requires newly installed interior products to meet CDPH Standard Method v1.2 emission limits. Both GREENGUARD Gold and FloorScore are accepted as evidence of compliance. WELL also addresses phthalates and halogenated flame retardants separately, so a VOC certification alone does not satisfy all WELL material requirements.

CHPS — Collaborative for High Performance Schools

CHPS requires low-emitting materials in school classrooms and facilities. FloorScore is the default flooring certification cited in CHPS criteria. GREENGUARD Gold is accepted for all applicable product categories, including wall panels used in school interiors. The classroom exposure scenario in the CDPH method is specifically designed for this use case.

8. How to Verify a Certification Claim

A certification logo on a product page or spec sheet is not sufficient proof. Both certifications are publicly verifiable, and the verification process takes less than five minutes.

For GREENGUARD Gold

1. Go to the UL SPOT database at spot.ul.com.
2. Search by manufacturer name or product name.
3. Confirm the exact product line and collection is listed — not just the brand.
4. Check the certificate status (active or expired) and the validity period.
5. Verify that the certification is GREENGUARD Gold, not just standard GREENGUARD.

For FloorScore

1. Go to the SCS Global Services certified products directory at scscertified.com.
2. Search by manufacturer name or product name.
3. Confirm the exact product line and model is listed.
4. Check the certificate validity period and whether it is current.
5. Verify that the certificate covers the product you are purchasing, not a different variant.

Common verification issues

• Brand vs. product line: A manufacturer may hold certification for one product line but market it as if it covers all products. Match the exact SKU or collection.
• Expired certificate: Both require ongoing certification maintenance. A certificate that has lapsed is not valid documentation, regardless of how recently the product was purchased.
• Standard GREENGUARD vs. GREENGUARD Gold: Standard GREENGUARD has higher limits (TVOC 500 µg/m³) and is less strict than Gold. Confirm which tier is certified.
• Self-declared claims: Some suppliers present a laboratory test report as “certification”. A test report from an accredited lab is useful evidence, but it is not the same as a third-party certification with ongoing surveillance.

For the same verification discipline applied to fire test reports — checking laboratory accreditation, matching the product to the report, and confirming standard versions — see our guide on how to verify a PVC wall panel fire test report.

9. Common Mistakes to Avoid

1. Assuming FloorScore covers wall panels

FloorScore is primarily a flooring-focused certification. If you are sourcing PVC wall panels, GREENGUARD Gold documentation or equivalent CDPH Standard Method v1.2 test results are generally more appropriate.

2. Treating standard GREENGUARD as GREENGUARD Gold

Standard GREENGUARD has the same TVOC limit as FloorScore (500 µg/m³). GREENGUARD Gold is significantly stricter (220 µg/m³). If a specification calls for “GREENGUARD Gold”, standard GREENGUARD documentation does not satisfy it.

3. Confusing VOC certification with material safety

Both GREENGUARD Gold and FloorScore are emissions certifications — they measure what comes off the product into the air. They do not certify that the product is free of phthalates, lead, or other substances of concern in its composition. A product can contain a controversial material and still pass emissions testing if that material does not off-gas above the threshold. Material composition information and regulatory compliance (such as California Prop 65) should be evaluated alongside, not replaced by, VOC certifications.

4. Accepting a certificate without checking the database

Both certifications are publicly verifiable in official databases. A logo on a spec sheet is marketing, not proof. If the product is not listed in the UL SPOT or SCS database, treat the claim as unverified.

5. Forgetting the three-year documentation rule

LEED v4.1 requires that low-emitting materials documentation be less than three years old, measured from the testing date to the date the product is installed. A certificate issued five years ago does not qualify, even if the product formulation has not changed. Manufacturers should re-test on a two-to-three-year cycle to keep documentation current.

6. Ignoring installation materials

A certified wall panel installed with a high-VOC adhesive can still compromise indoor air quality. If adhesives, primers or sealants are part of the installation, they should also carry low-VOC documentation. The LEED v4.1 credit requires each layer of an assembly to be compliant separately.

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Related Guides

• How to Verify a PVC Wall Panel Fire Test Report
• California Prop 65 Compliance for PVC Wall Panels and Building Materials
• ASTM E84 Class A PVC Wall Panels: What North American Buyers Need to Know
• PVC Wall Panel Fire Ratings: ASTM E84 Class A vs GB 8624 B1 vs EN 13501-1 B-s1,d0
• WPC Wall Panels: Product Range Overview

10. Frequently Asked Questions

What is the difference between GREENGUARD Gold and FloorScore?

GREENGUARD Gold, issued by UL Solutions under the UL 2818 standard, applies to a broad range of interior products including wall panels, furniture, paint and insulation, and uses stricter emission limits (TVOC 220 micrograms per cubic metre, formaldehyde 9 micrograms per cubic metre). FloorScore, issued by SCS Global Services in partnership with the Resilient Floor Covering Institute, applies only to hard-surface flooring and adhesives, and uses the CDPH Standard Method v1.2 limits (TVOC 500 micrograms per cubic metre, formaldehyde 16.5 micrograms per cubic metre). However, the two programs have different product scopes, certification protocols and requirements, so compliance with one program should not automatically be interpreted as certification under the other.

Can PVC wall panels get FloorScore certification?

FloorScore is designed for hard-surface flooring products and their adhesives, including LVT, SPC, WPC, vinyl sheet, rubber and linoleum flooring. Wall panels are generally outside its standard flooring scope. For PVC wall panels, GREENGUARD Gold certification under UL 2818 is generally the more relevant VOC emissions certification, as it covers wall panels and interior finishes as a product category. However, the specific eligibility of any product should be confirmed with the certification body.

Do GREENGUARD Gold and FloorScore use the same test method?

Both certifications reference the California Department of Public Health (CDPH) Standard Method v1.2-2017, also known as California Section 01350, as the common testing baseline. GREENGUARD Gold additionally uses the UL 2821 test method to evaluate a broader panel of over 360 individual VOCs against stricter limits. FloorScore focuses on the 35-plus specific VOCs listed in the CDPH method. Both use dynamic environmental chamber testing under controlled temperature, humidity and air exchange conditions.

Which certification does LEED v4.1 require for low-emitting materials?

LEED v4.1 does not mandate a single certification brand. The Low-Emitting Materials credit accepts products that have been tested according to CDPH Standard Method v1.2-2017 and comply with the VOC limits in the method. Both GREENGUARD Gold and FloorScore may be used as third-party evidence to support compliance, subject to the current LEED version, product category and project documentation requirements. The credit organises interior products into eight categories, including flooring and wall panels as separate categories, and requires 75 to 90 percent of products by cost or surface area to be compliant. Documentation must be less than three years old.

How do I verify that a product is genuinely GREENGUARD Gold or FloorScore certified?

GREENGUARD Gold certifications can be verified in the UL SPOT database at spot.ul.com by searching the manufacturer name or product name. FloorScore certifications can be verified in the SCS Global Services certified products directory at scscertified.com. For both, match the exact product line and collection, not just the brand, because a manufacturer may certify some product lines and not others. Also check the certificate validity period, as both require ongoing certification maintenance, which may include periodic evaluation, surveillance and factory audits.

Does a low-VOC certification mean a PVC panel is free of all harmful chemicals?

No. Both GREENGUARD Gold and FloorScore are emissions certifications. They confirm that a product releases VOCs into the air at levels below defined limits during the testing period. They do not verify that the product is free of every substance of concern in its composition, nor do they address durability, fire performance, or other regulatory requirements. A product could contain a controversial material and still certify, as long as that material does not off-gas above the threshold. Emissions certification should be considered alongside, not in place of, material composition information and fire safety documentation.

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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. VOC emission documentation for a specific Homax Decor product depends on the product configuration and destination market. Contact us to confirm which documentation applies to your product and project market.

Disclaimer: This article is for informational purposes and does not constitute legal or certification advice. GREENGUARD Gold is a certification mark of UL Solutions. FloorScore is a registered trademark of the Resilient Floor Covering Institute. Certification requirements, emission limits and green building credit criteria are subject to change. Always confirm current requirements with the certification body and the project team before relying on any documentation.