How Hard Are Different Wood Flooring Species?

Wood species differ in resistance to dents, and the Janka test gives a useful comparison: red oak is 1,290 lbf, hard maple 1,450 lbf, hickory 1,820 lbf, and Brazilian cherry 2,350 lbf. These figures do not measure scratch resistance or moisture safety. Choose for your household’s impact risks, finish, and installation conditions, not hardness alone.

Sustainability matters when choosing wood: look for clear information about species, origin, and responsible sourcing, rather than assuming a harder floor is automatically a better choice. If you are comparing samples online, Janka numbers can help narrow the options. They are only one part of the decision. A well-suited species, protective finish, and sound installation all matter.

In flooring assessments, I use hardness as a guide to dent risk, not as a single score for overall quality. The sections below explain what the numbers mean, how common species compare, and what to check before installation.

Wood Hardness and Subfloor Readiness

Janka hardness measures the force needed to press a steel ball halfway into a sample of wood. The figures below are representative pounds-force (lbf), tested using the ASTM D143 ball-embedment method. Species, growing conditions, origin, and test samples can cause values to vary.

A higher number means the sample resisted indentation more strongly in this specific test. It does not mean a floor cannot dent. Furniture legs, dropped objects, grit, and concentrated loads can still damage wood. The test also does not measure finish wear, scratching, splitting, or moisture response.

The differences can help you compare similar products. For example, hard maple’s listed value is 160 lbf above white oak’s, while Brazilian cherry’s is much higher than red oak’s. Those gaps do not translate directly into the same percentage of longer service life. Janka hardness is not a lifespan rating.

Before focusing on species, assess the floor below it. The subfloor must be sound, stable, and flat enough for the selected product. A common benchmark is no more than 3/16 inch of variation over 10 feet, unless the flooring manufacturer requires a tighter limit. Correct movement, high spots, or low spots with compatible methods before installation.

Key takeaway: Use Janka values to compare indentation resistance, then check product requirements and subfloor condition.

Choosing a Species for Your Household

Species selection works best when you connect the Janka number to the kind of impact your floor is likely to face. A busy entry, pets, or dropped toys may raise dent concerns. But finish, plank design, and maintenance also shape how the floor looks over time.

A household with heavy foot traffic may prefer a higher-hardness species, but that is not a guarantee against visible wear. Small particles tracked indoors can scratch a finish on any wood species. Felt pads and regular grit removal can reduce avoidable damage.

Consider these trade-offs:

• Red or white oak: Their listed values are relatively close. Choose between products based on appearance, finish, construction, and installation requirements, not only the 70 lbf difference.
• Hard maple: It tests harder than the oak examples, but the number alone cannot predict scratch resistance or how a particular finish will perform.
• Hickory or pecan: The higher listed hardness may suit buyers concerned about indentation. Review sample boards, because species character and product appearance vary.
• Brazilian cherry: Its value is highest in this table. Confirm the exact species and product specifications, and consider whether its look and sourcing meet your needs.

The wood’s construction matters, too. Solid and engineered flooring can use the same species but differ in how they are built and installed. Engineered products have a wood surface layer over other layers; the thickness and specifications of that surface layer matter. Ask the maker about the product’s construction, approved installation methods, and care instructions.

Key takeaway: Match the species and product to your home’s likely impacts, preferred appearance, and care habits.

Installation Method, Moisture Control, and Precision

Hardness cannot make a floor safe to install on a damp or unstable base. Wood changes size as moisture conditions change, and movement can contribute to cupping, gaps, buckling, or adhesive failure. The correct installation method and moisture limits depend on the specific flooring, substrate, and system.

Start by identifying the product’s construction, species, plank width, finish, and approved installation method. Then check the subfloor for soundness, flatness, and moisture. Confirm that framing and subfloor meet applicable code and the flooring maker’s requirements. Fix movement and surface irregularities with compatible materials.

There is no universal moisture limit that applies to every wood floor and adhesive. The maker may specify a limit for wood moisture content, concrete moisture-vapor emission rate (MVER), or in-situ relative humidity (RH). Use the specified test method and limit for your product; do not substitute one measurement for another.

Condition the room and flooring as directed by the manufacturer. Measure wood and subfloor moisture with suitable meters and keep a record of the results. Use only an approved underlayment, vapor retarder, or adhesive system for that substrate and installation method. An unapproved barrier or adhesive can create problems instead of solving them.

Install by the specified nail or staple, glue-down, or floating method. Follow product instructions for perimeter and fixed-object clearances, as well as transitions between flooring and other surfaces. If a product is not approved for the substrate or site conditions, choose a compatible product or correct the conditions first.

Key takeaway: Confirm the product’s installation and moisture requirements before work begins; do not rely on hardness to compensate for a poor base.

Field Scenarios: Applying the Hardness Numbers

These scenarios show how the numbers can guide a choice; they are practical examples, not controlled tests or claims about a specific installed floor. The right product still depends on its own specifications and the conditions at the site.

A busy entry with frequent impacts: A homeowner comparing red oak and hickory might consider hickory’s higher listed Janka value when dents are a concern. That does not settle the choice. The finish, tracked-in grit, entry mats, and cleaning routine also affect visible wear.

A kitchen with a questionable concrete base: A buyer may favor Brazilian cherry because it has the highest value in the comparison. But if moisture readings exceed the product’s limit, the hardness does not make installation appropriate. The next step is to follow the manufacturer’s moisture guidance and correct the site conditions or select an approved alternative.

A renovation with uneven subflooring: A harder species will not bridge a surface that fails the product’s flatness requirements. Check the floor against the manufacturer’s tolerance; a common benchmark is 3/16 inch over 10 feet. Correct high and low areas with materials suited to the substrate and flooring system.

Key takeaway: Use the Janka figure to frame a dent-risk discussion, then let verified product and site conditions decide whether installation is suitable.

Transitions, Clearances, and Structural/Safety Considerations

A floor needs room and support to perform as intended. Installation details vary by product, so follow the maker’s instructions for clearances, transitions, substrate support, and attachment. A sound, flat base and the correct installation system matter for every species in the table.

Wood can expand or contract as moisture conditions change. Preserve the perimeter and fixed-object clearances required by the product instructions, and detail transitions as specified. Do not assume a single clearance applies to all flooring, room sizes, or installation methods.

Check the subfloor and framing for movement and confirm they meet applicable code and product requirements. If the floor feels unstable or the base is damaged, resolve that issue before covering it. A hard species cannot correct a weak or moving structure.

Key takeaway: Follow the product’s clearance and support details; do not improvise a system based on species hardness.

Cleaning, Finish Care, and Long-Term Protection

Hardness describes resistance to one type of indentation. It does not tell you how well a finish resists scratches, how often the floor needs care, or whether the product can be refinished. Use the flooring maker’s care instructions for the installed finish.

Remove grit regularly, since abrasive particles can wear or scratch finishes. Use protective pads under furniture and follow the manufacturer’s guidance for cleaning products and moisture. Avoid assuming that a harder wood needs less care.

If you are comparing long-term options, ask whether the specific product can be refinished and what its surface-layer thickness allows. Do not infer refinishing potential from the species name or Janka value. Solid and engineered products can differ in this respect.

Key takeaway: Protect the finish and confirm care and refinishing guidance for the exact product.

Conclusion: Using Janka Values Wisely

Janka hardness is a useful, limited comparison of how wood samples resist indentation. In this set, red oak is 1,290 lbf, white oak 1,360 lbf, hard maple 1,450 lbf, hickory or pecan 1,820 lbf, and Brazilian cherry 2,350 lbf.

Use those figures to narrow choices if dents are a concern. Then compare finish, construction, appearance, and maintenance needs. Finally, verify that the product suits the substrate, moisture conditions, and installation method. A higher number cannot make an unsuitable site ready for flooring.

Frequently Asked Questions

These short answers clarify how to read Janka ratings and apply them to flooring decisions. They do not replace the requirements for a specific product, which can vary by construction, finish, substrate, and installation method.

What does a Janka rating measure?
It measures the force needed to press a steel ball halfway into a wood sample. It is a comparison of indentation resistance, not a complete durability score.

Which wood in this comparison is hardest?
Brazilian cherry, also called jatoba, has the highest listed value here at 2,350 lbf. Values can vary by sample and origin.

Is hickory harder than oak?
In the representative values shown, hickory or pecan is 1,820 lbf, above red oak at 1,290 lbf and white oak at 1,360 lbf.

Does harder wood resist scratches better?
Not necessarily. Janka testing measures indentation resistance, not finish scratching. Grit, finish type, and care also affect visible wear.

Can a hard wood floor still dent?
Yes. Higher hardness does not prevent dents from concentrated loads, impacts, or other damaging conditions.

Does a high Janka rating mean a floor will last longer?
Not by itself. The rating is not a lifespan measure. Product construction, finish, installation, moisture control, and use also matter.

Are Janka values identical for every board of a species?
No. Species, origin, growing conditions, and test samples can lead to variation. Treat published values as representative comparisons.

Can hard wood be installed over a damp subfloor?
Not unless the product and installation system allow the measured conditions. Follow the manufacturer’s moisture limit and test method; hardness does not prevent moisture damage.

What subfloor flatness should I check?
A common benchmark is 3/16 inch over 10 feet, or the flooring manufacturer’s stricter requirement. Verify the specific product instructions before installation.

How should I choose between oak, maple, hickory, and Brazilian cherry?
Compare Janka values for dent risk, then review the exact product’s appearance, finish, construction, care needs, and installation requirements.

(This article was written by one of our staff writers, Michael Roberts. Visit our Meet the Team page.)