Solid Hardwood Flooring Installation & Care

This covers how solid hardwood installs and how to keep it looking new — the parts that are the same across every solid floor we carry. Solid hardwood is real wood, so it has different installation and maintenance requirements than vinyl flooring: it is nailed or glued down (never floated), it belongs in dry above-grade rooms, and it can be refinished for decades. For the exact acclimation time, subfloor tolerance, and any radiant-heat approval for a specific floor, see that product’s Specifications and Installation section, or ask us for the manufacturer’s installation guide. Questions? Call or text (408) 753-3220 or visit the showroom at 891 Laurelwood Rd, Suite 101, Santa Clara.

The guidance below summarizes installation and care practices commonly recommended across the solid hardwood brands we carry. Always follow the manufacturer-specific installation guide supplied with your selected product, as warranty requirements and installation details vary by brand.

How solid hardwood installs

Solid hardwood is fastened down, not floated. Over a wood subfloor it is nailed down; over an above-grade concrete slab it is glued down (nails don’t hold in concrete). It is never clicked together and left loose over the subfloor — which is why it’s a harder install than a floating floor and why many homeowners hire a pro.

The essentials that apply to every solid install:

Leave a perimeter expansion gap at every wall, cabinet, island, pipe, and door jamb, hidden later by baseboard and shoe molding. Real wood swells in summer and shrinks in winter; pinch it against a wall and you’ll get buckling within a season or two.
Stagger end joints between rows, and rack boards from several open cartons at once so grain and tone mix evenly.
On a nail-down install, blind-nail through the tongue using the fastening schedule specified by the flooring manufacturer and the correct flooring nailer for the product.
For long continuous runs from room to room, check the spec for T-molding transitions at doorways.

Solid hardwood is for dry, above-grade rooms only — not basements or other below-grade spaces. Acclimation time, subfloor flatness tolerance, and moisture limits are per-manufacturer and per-jobsite; the exact figures for your floor are on its product page.

Acclimation and moisture — the step that makes or breaks a wood floor

Real solid wood needs genuine acclimation — often several days in the install room, not a quick overnight. Open the cartons or follow the manufacturer’s acclimation instructions so air can circulate around the boards, and let the wood settle to the room’s in-use temperature and humidity before a single plank is cut.

Acclimate to equilibrium, not the calendar: a moisture meter reading of the subfloor and the planks should sit close before the floor goes down (your manufacturer specifies the acceptable spread). A wider gap means the wood hasn’t reached the room’s moisture content yet and will shrink or swell after it’s installed. Run the HVAC at the home’s real living conditions first — and on new construction, let fresh drywall and plaster finish shedding moisture before the floor goes in.

After install, keep indoor relative humidity steady, around 35–55%, through the seasons. Small seasonal gaps are normal and often close again as conditions stabilize.

Over concrete, and over radiant heat

Over concrete: on-grade or above-grade only. Because nails don’t hold in a slab, solid wood over concrete needs either a nailable plywood subfloor built over the slab, or a glue-down with a moisture-barrier system. Follow the manufacturer’s approved concrete preparation and moisture-barrier system for your specific flooring and adhesive — approved assemblies vary by brand. For below-grade basements, engineered wood is the recommended choice, because concrete below grade is subject to ongoing moisture.

Over radiant heat: solid wood is the most movement-prone flooring to put over radiant, so engineered is usually the safer call. Solid can work only with the manufacturer’s approval for that exact product, within the specified surface-temperature limit, and with a slow, gradual ramp-up. With wood over radiant, humidity swings cause more movement than the heat itself — keep indoor humidity steady, and follow the manufacturer’s commissioning procedure.

DIY vs professional, and the warranty

Solid hardwood is a harder DIY than click flooring — it needs a nailer or adhesive, a flat, dry, moisture-tested subfloor, and real acclimation. In the most common case DIY is allowed, but install mistakes — skipped acclimation, a damp or uneven subfloor, improper fastening, no expansion gap — void that portion of coverage, while manufacturing defects stay covered. A few brands require professional installation as a condition of coverage. Check your floor’s warranty before deciding.

Pro tip: follow the manufacturer procedure to the letter — it changes what happens when a claim is filed. Manufacturers commonly evaluate whether installation followed published instructions during warranty inspections, so a clean install with proper acclimation and moisture readings protects your coverage. Price a licensed contractor quote first.

Everyday cleaning

Clean with a product made for hardwood — not a vinyl or all-purpose cleaner, and never a “mop and shine” product, which leaves a film that traps grit and clouds the finish over time. The single most important rule: never wet-mop solid wood. Standing water is the fastest way to cup and stain it. Dust-mop or vacuum (hard-floor setting, beater bar off) for daily dirt; for an occasional deeper clean, use a barely-damp microfiber wrung out until it feels almost dry, with a pH-neutral hardwood cleaner — the floor should dry quickly without leaving standing water.

Grit tracked in from outside is what dulls a wood finish fastest. Walk-off mats at every entrance plus regular vacuuming in high-traffic lanes help preserve the finish. Recoat before the finish wears through to bare wood — a screen-and-recoat is a fraction of the cost of a full sand-back once traffic reaches raw timber.

What to avoid

Steam mops — keep them off solid wood entirely. The pressurized heat and moisture drive water into the boards and break down the finish, and unlike vinyl there’s no waterproof core to fall back on. Many warranties deny steam-cleaner damage outright.
Rubber- and latex-backed mats — the backing can react with the finish and leave a discolored shadow, and it traps moisture against the boards. Use felt-backed or woven natural-fiber mats, and don’t leave one sitting over the same spot for months.
Abrasive powders and scouring pads — they scratch any floor; treat the finish gently with soft microfiber and a neutral cleaner. One advantage of solid hardwood is that worn surfaces can often be restored through professional refinishing rather than replacement.

Furniture and pets

Office chairs on hard plastic wheels do more damage than any pet — swap them for wide rubber or silicone casters, or use a chair mat. Felt pads on every furniture leg aren’t optional, and they need replacing every 6–12 months as they flatten and pick up grit. Pet claws rarely mark a well-finished floor during normal walking, but a dog scrambling to a start or stop can chip plank edges at doorways — keep claws trimmed and lay runners where pets build up speed.

Before you buy, if you have pets: the finish grade matters more than any thickness number. A finish reinforced with aluminum oxide or ceramic generally resists nails and daily paw traffic for years. Go easy on heavy wire-brushed or deeply rustic textures in a pet home, too — the deep grooves trap hair and grit where a vacuum can’t reach.

Refinishing — the advantage that only real wood has

Because a solid plank is real timber all the way through, it can be sanded flat and recoated many times over its life — to erase years of wear, change the stain, or update the sheen, all without tearing the floor out. Individual damaged boards can be repaired or replaced by a skilled installer, and appraisers count solid hardwood toward a home’s value. Cared for the way this guide describes, a solid floor is renewed in place rather than replaced — which makes it one of the longest-lasting flooring options we offer.

See it in person before you decide. Real wood reads differently under your own light, and grain and tone vary board to board. Handle a full-size sample and ask us for the manufacturer’s installation guide for the floor you’re considering — 891 Laurelwood Rd, Suite 101, Santa Clara, CA 95054.