Introduction
Quick answers to the questions hardwood flooring buyers ask most — quantities, species, installation methods, costs, and care. For the full walkthrough behind these answers, see the Hardwood Flooring Calculator and the complete guide.
Frequently Asked Questions
Ordering and Quantities
How much hardwood flooring do I need?
Measure net square feet (length × width per room), then add waste: 10–15% for straight layouts, 15–20% for diagonal or herringbone. Example: a 14 × 16 ft room = 224 ft² → 251 ft² with 12% waste → order 13 boxes (260 ft²). Metric: 4.27 × 4.88 m = 20.8 m² → 23.3 m² with waste → order 24 m².
How many square feet are in a box of hardwood flooring?
Typically 18–25 ft² (1.7–2.3 m²), printed on the carton. Always use your specific product’s coverage — it varies with plank width and species. Round up to whole boxes; the overage is your repair stock.
What is a board foot, and does it matter for flooring?
A board foot is 144 cubic inches of lumber — the unit rough lumber is sold by. Finished flooring is sold by the square foot of coverage, so you rarely need board feet unless buying rough stock: 1 board foot of ¾” lumber ≈ 1.33 ft² of floor surface.
Should I order extra for future repairs?
Yes — keep at least one full box from the same dye lot, stored flat in climate-controlled space. Wood color varies between production runs, so later purchases won’t match exactly.
Species and Materials
What is the hardest hardwood flooring?
Among common domestic species, hickory at 1,820 lbf on the Janka scale. Exotics like Brazilian cherry (2,350) are harder but pricier. For most households with pets, hickory or white oak (1,360) is the practical sweet spot.
Is engineered hardwood real wood?
Yes — the wear layer (2–6 mm) is genuine hardwood over a plywood or HDF core. It looks and feels like solid wood, can be refinished 1–3 times, and uniquely tolerates concrete slabs, basements, and radiant heat.
What’s the difference between prefinished and site-finished?
Prefinished arrives factory-coated with aluminum-oxide urethane (hardest finish, zero on-site disruption, micro-bevel seams). Site-finished is sanded and coated in place (seamless flat floors, unlimited custom stains, but days of dust and fumes). See the material guide for the full comparison.
What do flooring grades mean?
Grades describe appearance, not strength: clear/select (uniform, premium price), #1 common (some character, best value), rustic/#2 common (knots and variation, lowest price). Grade affects looks and cost — species hardness determines durability.
Installation
Can hardwood flooring go over concrete?
Engineered hardwood can — glued, floated, or over a plywood subfloor system — after the slab passes moisture testing (typically under 75% RH or 3 lb calcium-chloride). Solid ¾” hardwood should not go over concrete or below grade.
How long does hardwood need to acclimate?
7–14 days in the installation room at normal living conditions (60–80°F / 15–27°C, 30–50% relative humidity), with cartons opened for airflow. Verify with a moisture meter: flooring within ~2–4 percentage points of the subfloor’s moisture content.
Which direction should the boards run?
Parallel to the longest wall, typically toward the main light source or entrance, keeping the same direction through doorways. Plan the final row width before starting so you don’t end with a sliver.
How big an expansion gap is needed?
½” at all walls, pipes, and fixed objects, concealed by baseboards and shoe molding. Floating floors wider than ~30 ft need T-molding breaks.
Can I install hardwood flooring myself?
Floating click-lock engineered in a simple room: yes, genuine beginner project. Nail-down solid, glue-down, stairs, patterns, and site finishing: hire a pro. The DIY vs. pro guide breaks down the decision.
Costs
What does hardwood flooring cost per square foot?
Typical installed totals: $6–$15/ft² for mainstream choices. Budget engineered floating near $6–$8; mid-tier solid oak nail-down near $11–$14; exotics, patterns, and stairs higher. Full breakdown in the cost guide.
Is it cheaper to refinish or replace?
Refinishing ($3–$7/ft²) is almost always cheaper than replacement when the floor is structurally sound. Solid hardwood can be refinished many times; engineered 1–3 times depending on wear layer.
Care and Problems
Why is my hardwood floor gapping?
Seasonal shrinkage from low indoor humidity — most common in winter with heating running. Maintain 30–50% RH year-round. Gaps from skipped acclimation are wider and don’t close in summer; those are installation failures, covered in common mistakes.
Why is my floor cupping?
Moisture imbalance — usually moisture from below (damp subfloor, slab, or crawl space) or a spill left standing. Identify and fix the moisture source first; the boards may flatten once equilibrium returns, or may need professional attention.
How do I clean hardwood floors?
Dry mop or vacuum regularly; damp-mop (not wet) with a manufacturer-recommended cleaner. Never steam-mop, never flood with water, and put felt pads on furniture feet.
How long does hardwood flooring last?
Solid hardwood: 75–100 years with refinishing every 7–10 years in traffic areas. Engineered: 20–50 years depending on wear-layer thickness and refinish cycles.
Does furniture damage hardwood floors?
Unprotected furniture feet scratch and dent any species. Use felt pads on all furniture feet, lift (don’t drag) heavy pieces, and place mats at entrances to trap grit — sand tracked in on shoes is essentially sandpaper.
Can hardwood flooring be installed over radiant heat?
Engineered hardwood rated for radiant heat: yes, within the manufacturer’s surface-temperature limits (commonly 80–85°F / 27–29°C floor temperature). Solid hardwood over radiant heat is generally not recommended — check the product’s specs and warranty terms.
Will my hardwood floor change color?
Yes — most species shift with UV exposure. Cherry and Brazilian cherry darken notably; oak mellows. Use window treatments in strong sun, and move rugs occasionally in the first year so the floor ages evenly rather than leaving light outlines.
Related Guides
- Complete Hardwood Guide — the full estimating walkthrough.
- Material Guide — species, grades, and finishes.
- Cost Guide — pricing breakdowns.
- Estimating Guide — measuring rooms and stairs.
- Pro Tips — installation best practices.
- Project Checklist — verify before ordering.
Disclaimer: Calculator results are planning estimates based on the dimensions you enter. Actual material needs vary with species, board widths, layout pattern, subfloor condition, and installer technique. Verify quantities with suppliers and local professionals before ordering.
