How to Lay Hardwood Flooring: Step-by-Step Guide

Most failed hardwood installations trace back to two skipped steps: insufficient acclimation and inadequate subfloor prep. How to lay hardwood flooring properly is more about the days before the first plank goes down than the install itself. The actual nailing, gluing, or clicking is straightforward once preparation is right. This guide walks through the full sequence — solid plank nail-down, engineered glue-down, and floating click install — with the exact specs, tools, and timing a homeowner needs to do the job correctly.

Tools and Materials Checklist

Tools required for nail-down installation:

• Pneumatic flooring nailer (rent from $50/day) and 1.5 to 2 inch cleats
• Compressor with 90 PSI capability
• Miter saw with 80-tooth fine-finish blade
• Table saw or track saw for ripping plank widths
• Jigsaw with fine-tooth blade for irregular cuts
• Tapping block and white rubber mallet
• Pull bar for tight spots
• Pry bar and trim puller for baseboards
• Pin moisture meter (Tramex CME or General MMD4E)
• Tape measure, chalk line, framing square, 4-foot level
• Knee pads — you will thank yourself

Additional for glue-down: notched trowel sized to manufacturer spec, urethane adhesive (Bostik Best, Mapei Ultrabond ECO 995), and adhesive remover wipes.

Step 1: Acclimate the Wood

The first rule of how to lay hardwood flooring without callbacks: deliver hardwood to the install room at least 5 days before installation, longer for solid plank in dry winter or humid summer. Open all boxes, stack the planks loosely (not in their original tight stacks), and run HVAC at normal occupancy temperature and humidity throughout. Solid plank target: 6 to 9 percent moisture content matched to the subfloor within 2 percent. Engineered: 6 to 11 percent depending on manufacturer spec.

Verify with a pin meter on three random planks per box and on the subfloor in three locations. Do not start install until readings are within manufacturer tolerance. This is the most-skipped and most-expensive step to get wrong.

Step 2: Subfloor Preparation

The subfloor must be flat, dry, and clean before flooring touches it.

1. Remove existing flooring, baseboards, and door thresholds completely
2. Inspect the subfloor for damage, soft spots, water staining, or unevenness
3. Replace damaged sections with matching thickness plywood, glued and screwed to joists at 6-inch spacing
4. Verify subfloor thickness — 3/4 inch T&G plywood minimum for nail-down solid plank
5. Sand or grind any high spots and skim-coat low spots with self-leveling compound
6. Verify flatness — under 3/16 inch deviation over 10 feet for nail-down, under 1/8 inch over 6 feet for glue-down
7. Run a moisture meter — under 12 percent on plywood, under 4 percent on concrete (or 3 lbs on calcium chloride test)
8. Vacuum thoroughly with a shop vac and brush attachment

Step 3: Underlayment

For nail-down install over plywood subfloor, use 15-pound felt paper or rosin paper as a slip-sheet. This reduces squeaks and acts as a vapor retarder.

For glue-down over concrete, the adhesive often serves as the vapor retarder; verify with manufacturer specs. If a separate vapor barrier is required, a 6-mil polyethylene sheet under the felt paper does the job.

For floating click installs, use the manufacturer-specified underlayment — typically a 2 to 3 mm foam or cork pad with integrated vapor barrier.

Step 4: Plan the Layout

Run planks parallel to the longest wall in most rooms — this reads most natural. Snap a chalk line 3/8 inch from that wall to establish the starter row position. Verify the line is straight by measuring to the parallel wall at multiple points; out-of-square rooms require splitting the difference.

Dry-lay the first 3 rows along the chalk line to verify color and grain mix. Pull from at least 3 boxes simultaneously to randomize the pattern. Stagger end joints 12 inches minimum, ideally 18 inches. Avoid stair-step patterns where joints cluster diagonally.

Step 5: Racking and Installing the First Rows

The first 3 rows determine straightness for the entire floor. Take time here.

Nail-down installation: place the first plank with the groove side toward the wall, leaving a 3/8-inch expansion gap. Top-nail through the face of the first plank near the wall — these holes will be hidden by baseboards. Continue rows using the flooring nailer, driving cleats every 6 to 8 inches at a 45-degree angle through the tongue.

Glue-down installation: spread adhesive with the manufacturer-specified trowel in 4 to 6 square foot sections. Press planks into adhesive and slide slightly to ensure transfer. Do not slide too far or you will smear adhesive onto plank tops.

Click installation: angle the next plank into the previous row, lower flat, and tap with a tapping block to seat the joint. Use a pull bar at walls where the tapping block does not fit.

Step 6: Continue the Field

Work across the room row by row, mixing planks from multiple boxes to randomize color. Cut end pieces with a miter saw — a 90-degree square cut for end-of-row pieces, leaving 3/8-inch expansion gap from the wall.

Use the cutoff piece from each row to start the next row, when length permits, to minimize waste and maintain stagger. If the cutoff is shorter than 8 inches, discard it and start fresh from a new plank.

Check straightness every 5 to 10 rows by sighting down the joint line or using a long straightedge. Small deviations correct easily early; large deviations cascade across the room.

Step 7: Cut Around Obstacles

Door jambs: undercut the jamb with a flush-cut saw to the height of the new flooring plus underlayment, then slide the plank under. This produces a far cleaner detail than scribing around the jamb.

HVAC vents: measure twice, cut once with a jigsaw. Leave 1/4-inch expansion gap around the vent opening.

Toilet flanges, plumbing penetrations, and other obstacles: trace the obstacle, cut with a jigsaw, and leave 1/4-inch gap. Cover with appropriate trim or escutcheon.

Step 8: Final Row and Transitions

The final row almost always requires ripping planks to width. Measure from each end and rip to fit, allowing the 3/8-inch expansion gap. Use a pull bar to seat the final row tightly against the previous row.

Install transition strips at room boundaries — T-molding for level transitions, reducer for height differences. Use the manufacturer’s transitions, not generic — they match the floor color and finish.

Reinstall baseboards last. Do not nail baseboards into the flooring — only into the wall. The flooring needs to expand and contract independently.

Step 9: Final Cleanup and Care

Vacuum the floor with a soft-bristle attachment. For unfinished hardwood, schedule sanding and finishing. For prefinished, allow 24 hours before furniture replacement and 48 to 72 hours before normal foot traffic.

Frequently Asked Questions

How long does it take to install hardwood flooring?

An experienced installer covers 200 to 400 square feet per day for nail-down. DIY pace runs 100 to 200 square feet per day. Add 5+ days for acclimation before install begins.

Can I lay hardwood over existing flooring?

Engineered hardwood floats over most existing hard surfaces if the floor is flat and clean. Solid nail-down requires bare plywood subfloor — remove existing flooring first.

What’s the most common mistake in how to lay hardwood flooring?

Skipping acclimation. The second is failing to leave proper expansion gaps at walls. Both lead to gapping or cupping that shows up months after install completes.

Do I need to remove baseboards before installing hardwood?

Removing baseboards produces a cleaner installation and allows proper expansion gaps under them. Working around baseboards forces shoe molding or quarter-round trim, which works but reads less professional.