Laminate and engineered hardwood are built from wood glued back together, and the glues can give off small amounts of formaldehyde and other VOCs, especially while a floor is new. Two seals tell you a floor has been tested for that: FloorScore and GreenGuard, with GreenGuard Gold the stricter tier. Both are worth looking for on a wood or laminate box. Here's what each one actually tests, the formaldehyde limits the law already sets, and how to pick a low-emission floor for your home.
Why Do Laminate and Engineered Hardwood Off-Gas at All?
Laminate and engineered hardwood off-gas because both are composite wood, held together with resins that can release formaldehyde. VOCs, short for volatile organic compounds, are carbon-based chemicals that evaporate into the air at room temperature, and formaldehyde is the one that matters most in wood products because it comes from the adhesives that bind the layers. A laminate plank is built on a high-density fiberboard core, which is wood fiber pressed together with resin, under a printed image and a clear wear layer. Engineered hardwood is a real-wood veneer glued over a plywood or fiberboard core. Both use glue, so both can emit a little formaldehyde, while solid hardwood uses far less and emits the least.
The good news is that these emissions are highest when a floor is brand new and fall off over the following weeks and months as the floor airs out. That's why a new floor can have a faint smell that fades. Fresh air speeds it up. The goal for a healthy home is to start with a floor certified to emit little in the first place, and then give it air and time once it's down. This matters more in the Inland Empire than people expect, because our hot summers keep homes sealed up and air-conditioned for months, so whatever a floor gives off stays inside.
What Formaldehyde Limits Does the Law Already Require?
Any composite wood sold in the United States already has to meet a federal formaldehyde limit, so a floor bought today starts low before any green seal enters the picture. The rule is the EPA's Toxic Substances Control Act (TSCA) Title VI, and it is set at the same levels as California's own long-standing limits from the California Air Resources Board (CARB), so the federal and state numbers match. The current caps, known as Phase 2, hold formaldehyde to 0.05 parts per million (ppm) for hardwood plywood, 0.09 ppm for particleboard, 0.11 ppm for medium-density fiberboard, and 0.13 ppm for thin MDF. Those levels roughly halved the earlier Phase 1 limits of 0.08 ppm, 0.18 ppm, and 0.21 ppm.
Composite wood type | Phase 1 limit (older) | Phase 2 limit (current) |
|---|---|---|
Hardwood plywood | 0.08 ppm | 0.05 ppm |
Particleboard | 0.18 ppm | 0.09 ppm |
Medium-density fiberboard | 0.21 ppm | 0.11 ppm |
Thin MDF | 0.21 ppm | 0.13 ppm |
What this means for you is simple: a laminate or engineered floor made for the US market is already built to a formaldehyde ceiling, so the question is not whether a floor off-gasses without limit, but how far below that ceiling it goes. That is where the two voluntary certifications come in, because they test the finished floor and prove it clears a stricter, health-based bar.
What Does FloorScore Certification Mean on a Wood Floor?
FloorScore means a finished floor passed an independent lab test for the chemicals it releases into the air. It is run by SCS Global Services with the Resilient Floor Covering Institute, and it was built specifically for hard-surface flooring, its adhesives, and its underlayments. To earn the seal, a floor is tested for 35 individual VOCs, including formaldehyde, against California's Section 01350 emissions method, a health-based lab-chamber test that models a real room. Laminate flooring and engineered hardwood are both eligible product types, which is why the FloorScore mark turns up on wood and wood-look floors. For a shopper, a FloorScore seal on the box is a flooring-specific promise that the product was measured and cleared rather than assumed to be clean.
What Do GreenGuard and GreenGuard Gold Mean?
GreenGuard, a certification from the safety-testing company UL, screens a product for more than 15,000 VOCs to show it has low chemical emissions, and GreenGuard Gold is its stricter tier. Standard GreenGuard covers general indoor use, while GreenGuard Gold sets even lower emission limits, which is what makes it the tier aimed at nurseries, schools, and healthcare settings, where children and sensitive people spend the whole day. GreenGuard Gold caps total VOCs at 220 micrograms per cubic meter, against 500 for standard GreenGuard, and holds formaldehyde to 7.3 parts per billion, well under the standard tier's 50. Unlike FloorScore, GreenGuard is a broad program that also covers furniture, mattresses, and building materials, so you'll see it well beyond the flooring aisle. For a home with young kids, an elderly parent, or anyone with asthma or chemical sensitivity, GreenGuard Gold is the mark worth prioritizing on a wood or laminate floor.
FloorScore vs. GreenGuard Gold: Which Seal Should You Look For?
Both FloorScore and GreenGuard Gold are credible third-party emissions certifications, and the practical difference is scope rather than trustworthiness. FloorScore is purpose-built for hard-surface floors and their adhesives, so it is the flooring industry's own emissions seal. GreenGuard, and especially GreenGuard Gold, is a broad program covering many product categories, with Gold holding the strictest health-based limits calibrated for sensitive environments. For a wood or laminate floor, either seal tells you the product was independently tested and passed. If someone in the home is especially sensitive, GreenGuard Gold is the higher bar, and plenty of quality floors carry both marks at once.
Question | FloorScore | GreenGuard Gold |
|---|---|---|
Who runs it | SCS Global Services with RFCI | UL Solutions |
Built for | Hard-surface flooring and adhesives | Many product types, flooring included |
Test basis | 35 VOCs, California Section 01350 | Low-emission limits, sensitive-use tier |
Best when | You want the flooring-specific seal | Kids, elderly, or allergy-sensitive home |
How to Choose a Low-VOC Wood or Laminate Floor
Choosing a low-emission floor comes down to reading the box and airing out the room, and a few steps cover it. None of it is hard. Look for a FloorScore or GreenGuard Gold seal on the product or its spec sheet, and treat either one as proof the floor was tested rather than assumed clean. Confirm the product meets CARB Phase 2 or TSCA Title VI, which any reputable US floor will. Once the floor is installed, run the HVAC and open windows when you can for the first few weeks, since fresh air is what carries off the early emissions. For a glue-down engineered floor, ask for a low-VOC adhesive, because the glue under the floor emits too. We stock laminate and engineered hardwood from major brands and can point you to the FloorScore and GreenGuard Gold options, and our overview of flooring certifications for California homes covers the seals across every material. You can also browse our laminate and hardwood selections, or read the wider picture in our laminate buyer's guide.
Questions We Get About Low-VOC Wood Floors
Does laminate flooring give off formaldehyde?
Laminate can give off a small amount of formaldehyde because its fiberboard core is bound with resin, but modern laminate sold in the US must meet a formaldehyde limit of 0.11 ppm or lower for its core, and a FloorScore or GreenGuard Gold seal means it was tested well below that. Emissions are highest when the floor is new and fade over the following weeks, so airing out the room speeds things along.
What is the difference between FloorScore and GreenGuard?
FloorScore is a flooring-specific emissions certification, while GreenGuard is a broad one that covers many products. FloorScore, run by SCS Global Services, tests floors for 35 VOCs under California's Section 01350 method. GreenGuard, run by UL, screens products across more than 15,000 VOCs. For a floor, either seal shows the product was independently tested for low emissions.
Is GreenGuard Gold better than FloorScore?
GreenGuard Gold holds the stricter emission limits, but that does not make FloorScore weak. GreenGuard Gold is calibrated for schools and healthcare settings, so it is the higher bar for a home with children or someone sensitive. FloorScore is the flooring industry's own seal and is a solid standard for a typical household. A floor carrying either has been tested and passed, and many carry both.
Does engineered hardwood off-gas?
Engineered hardwood can off-gas a little because its plywood or fiberboard core is glued, though the real-wood veneer on top emits nothing on its own. Any engineered floor sold in the US meets the federal formaldehyde limit for its core, and a FloorScore or GreenGuard Gold seal means it was tested lower still. Solid hardwood uses the least glue of the wood floors, so it off-gasses least.
How long does a new floor off-gas?
Most of a new floor's emissions come off in the first few weeks and taper over the first few months. Certified low-VOC floors start low, so the effect is small to begin with. Running the air conditioning, opening windows when the weather allows, and keeping the house at a comfortable temperature all help clear the early emissions faster.
Healthy Floors, Chosen With You in Upland
A healthy floor is not a mystery once you know which seals to trust and what the numbers behind them mean. We're a family-owned shop with two showrooms in Upland, we install laminate and engineered hardwood across the Inland Empire, and we're glad to walk you through the FloorScore and GreenGuard Gold options so you can choose with confidence. When you're ready, request a free in-home estimate and we'll help you pick a low-emission floor that fits your home and the people in it.
