How to Choose Plank Flooring Materials
Choose plank flooring by matching its core material to the room’s moisture exposure, your subfloor, and the way you plan to install it. Compare product-specific limits for flatness, moisture, underlayment, and movement clearance before buying. A suitable floor is not just a surface: it is a tested system of planks, preparation, and installation parts.
Replacing flooring can be costly and disruptive, so it pays to make the material decision before ordering. I compare what a product is made of, where it can be installed, and what the manufacturer requires beneath it. Those details matter more than a label such as “waterproof” or a plank’s appearance in a sample.
Start with the room and the existing floor structure. Then compare solid or engineered wood, laminate, and resilient planks against your needs. Even a well-chosen material can fail if it is installed over a damp, uneven, or unsuitable substrate.
Choose a plank material for the room and the way you live
Plank flooring materials differ in their response to moisture, wear, repair, and changes in temperature. Use the room’s conditions to narrow your options first. Then compare product-level warranties and installation rules, since performance can vary among products made from the same broad material.
What are the main plank flooring materials?
Solid wood is milled from one piece of wood and can often be refinished, but moisture and humidity changes can make it expand or shrink. Engineered wood has a real-wood surface over layered construction. Laminate has a printed image under a protective wear layer. Resilient planks, including many vinyl products, have synthetic layers.
| Material | Often worth considering for | Key limits to check |
|---|---|---|
| Solid hardwood | Dry living areas where a real-wood surface and future refinishing matter | Moisture limits, humidity guidance, installation method, and whether the subfloor is suitable |
| Engineered wood | Rooms where you want a real-wood surface with a layered construction | Product moisture limits, allowed installation methods, and refinishing guidance |
| Laminate | Buyers seeking a wood-look surface with a protective wear layer | Water exposure limits, edge and seam care, and whether the warranty covers the intended room |
| Resilient plank | Areas where easy cleaning and moisture resistance are priorities | Whether the specific product is approved for the room, its temperature limits, and its subfloor requirements |
“Waterproof” does not mean a floor can tolerate standing water, leaks, or moisture rising through a slab. Read the warranty and installation guide for the exact product. A claim may describe the plank itself, not the full floor assembly or the subfloor beneath it.
Match the material to use, care, and repair
Think about what happens in the room, not only how it looks on installation day. A kitchen may see spills; an entry may get grit and wet shoes; a sunny space may have large temperature swings. These are different demands, and the product guide should state whether the flooring suits them.
Consider whether you can replace a damaged plank, whether the surface can be refinished, and how you feel about visible wear over time. Refinishing is not an option for every wood product, and surface repair varies by material. Ask for the care instructions and warranty before purchase.
Inspect the Substrate, Structure, and Moisture Before Choosing Plank Flooring
The substrate is the surface that supports the new flooring, such as a wood subfloor or concrete slab. Its condition can rule out an otherwise appealing product. Before buying, identify what lies beneath the current floor and check for movement, unevenness, moisture, cracks, and contamination.
Check stiffness and flatness
A flexible or loose subfloor can affect the feel and performance of planks. On a wood subfloor, check for movement and secure loose panels as appropriate. Do not treat tile’s structural rules as plank-flooring rules: L/360 for ceramic or porcelain tile and L/720 for natural stone are tile criteria, not general requirements for floating or resilient planks.
Flatness means how much the surface varies over a given distance. Check the flooring maker’s stated tolerance with a straightedge. A common plank benchmark is no more than 3/16 inch of variation in 10 feet, but some products and installation methods require a tighter surface. Use the product’s limit, not the benchmark, when they differ.
Test for moisture and identify its source
Concrete can look dry and still hold moisture. Use the test method required by the flooring and adhesive manufacturers. These may include ASTM F2170, which measures relative humidity inside a concrete slab, or ASTM F1869, which measures moisture vapor emission rate at the surface.
There is no single acceptable reading for every floor. Compare your test results with the limits for the full product system, including adhesive when used. If readings exceed those limits, identify the cause and choose an approved mitigation method before covering the slab.
Persistent water pressure or an ongoing moisture source is a serious warning. A surface coating alone does not resolve hydrostatic moisture. Excess moisture can contribute to adhesive failure, curling, buckling, or microbial damage. Do not install over a damp or contaminated substrate without diagnosing it.
Prepare the Subfloor and Install Planks to Product Specifications
Preparation means making the substrate sound, clean, flat, and dry enough for the chosen flooring system. Installation instructions can differ even between products in the same category. Follow the exact guide for your flooring, rather than assuming that a familiar click-lock or glue-down method applies to every plank.
Follow a check, prepare, and install sequence
- Inspect and identify. Confirm whether the substrate is wood or concrete. Check wood flooring for movement and loose panels. Look for cracks, moisture signs, and old adhesive or finish that could affect bonding.
- Prepare and test. Remove contaminants and incompatible surface materials. Repair and flatten the substrate with products approved for that surface. Complete required moisture tests, and address unacceptable readings with an approved system before installation.
- Install the specified system. Use only the underlayment, vapor-control layer, or adhesive approved for the flooring, substrate, and method. Follow the adhesive maker’s trowel and coverage instructions. Condition or acclimate planks only as their manufacturer directs.
- Follow the layout instructions. Use the specified fastening, adhesive, or click-lock method. Do not mix components or add a generic cushion or vapor barrier unless the flooring maker approves it.
Underlayment is not a universal upgrade. An unapproved layer can interfere with a locking system or change how the floor performs. The same caution applies to moisture-control products: choose one that is compatible with the flooring and substrate, and follow its installation instructions.
Detail Transitions, Perimeter Movement, Safety, and Deflection Compliance
Movement clearance is the space left around a floor so it can respond to changes in temperature and humidity. Transitions connect flooring at doorways or changes in material or height. These details are part of the installation system, not cosmetic extras, and the product instructions control their placement and size.
Leave the required room to move
Floating floors need room to move at walls and fixed objects. A perimeter gap of 1/4 to 1/2 inch is common, but the manufacturer’s required clearance takes priority. Larger or irregular layouts may need extra movement accommodation. Do not trap a floating floor under fixed cabinetry or rigid trim, and do not fasten through the planks.
Install transition pieces where the product guide calls for them, including relevant doorways and changes in flooring or elevation. Confirm how the transition attaches so it does not pin a floating floor. Keep the floor’s movement space clear when fitting trim.
Compare installation scenarios before you commit
These examples show how room conditions can change the material choice. They are decision scenarios, not reports of a single tested installation.
| Scenario | What to verify before purchase | Practical direction |
|---|---|---|
| Concrete room with moisture concerns | Required ASTM test, product-system limits, and any approved mitigation | Delay selection or installation until moisture is diagnosed and within the approved system’s limits |
| Room where real wood is a priority | Product’s moisture guidance, substrate, and installation method | Compare solid and engineered wood instructions for the specific room |
| Busy area with frequent cleaning | Water exposure limits, cleaning directions, and warranty terms | Compare laminate and resilient products by their stated limits, not by marketing labels |
| Existing floor with uneven spots | Product flatness tolerance and approved repair materials | Correct the substrate before installing; do not expect planks to hide out-of-tolerance areas |
If the project includes ceramic or stone tile nearby, keep its structure requirements separate from the plank plan. Tile may require framing stiffness of L/360 for ceramic or porcelain, or L/720 for natural stone. Those figures do not set the structural requirement for plank flooring.
Maintain, Protect, and Repair Plank Flooring for Long-Term Performance
Maintenance is the routine care that helps preserve the floor’s surface and joints. The right approach depends on the material and finish. Keep the care guide with your purchase records, and use it to check which cleaners, mats, and repair methods the manufacturer permits.
Protect the floor and keep records
Follow the product’s cleaning directions and remove grit and spills in the way the maker recommends. Avoid assuming that a cleaner suitable for one material is safe for another. Keep spare planks when practical, along with the product name, batch details, warranty, and installation instructions.
When damage occurs, check the manufacturer’s repair guidance before replacing a plank or applying a surface product. Repair options depend on construction and installation method. If planks curl, buckle, or separate, investigate the moisture source, movement clearance, and substrate condition rather than treating the visible damage alone.
Frequently asked questions
Which plank flooring material handles moisture best?
It depends on the specific product and installation system. Compare stated moisture limits and warranty terms, and remember that a water-resistant plank does not correct a damp slab or active leak.
Is engineered wood always more moisture resistant than solid wood?
Not always. Construction differs, and room suitability depends on the product’s instructions and conditions. Compare the moisture guidance for the exact products you are considering.
Can I install plank flooring over concrete?
Some products allow it, while others require specific preparation, moisture tests, adhesives, or underlayment. Confirm the substrate and installation method in the flooring guide before ordering.
What moisture test should I use on a concrete slab?
Use the method required by the flooring and adhesive manufacturers. Requirements may include ASTM F2170 in-situ relative humidity or ASTM F1869 moisture vapor emission testing.
What is the acceptable concrete moisture level for flooring?
There is no universal limit. Use the specified limit for the flooring and installation system, and follow its approved mitigation method if results are too high.
How flat does a subfloor need to be for plank flooring?
Follow the manufacturer’s tolerance. A common benchmark is no more than 3/16 inch of variation over 10 feet, but some products require a flatter surface.
Do all floating floors need an expansion gap?
Floating floors generally need perimeter and fixed-object clearance, but the size depends on the product. A 1/4- to 1/2-inch gap is common; follow the manufacturer’s instructions.
Can I use any underlayment beneath plank flooring?
No. Use only an underlayment approved for the specific floor, substrate, and installation method. An unapproved layer may interfere with the floor system.
(This article was written by one of our staff writers, Michael Harlan. Visit our Meet the Team page.)
