How to Install Hardwood Flooring
Learn how to lay, rack, cut, and blind-nail tongue-and-groove hardwood planks across a subfloor with proper expansion gaps and staggered seams.
- Read the tools, materials, safety notes, and steps below for free.
- Tap Start Camera Coach when you want hands-free voice help.
- Allow camera and microphone. Point your phone at the work; the coach watches your progress and tells you the next step.
🧰 Required Tools & Equipment
- ✓ Flooring nailer with mallet
- ✓ Miter saw
- ✓ Table saw
- ✓ Pneumatic 18-gauge finish nailer
- ✓ Flooring pull bar and tapping block
- ✓ Chalk line and tape measure
- ✓ 1/2-inch expansion spacers
📦 Materials & Supplies
- ✓ Hardwood flooring planks (acclimated)
- ✓ 15 lb black felt paper or rosin paper
- ✓ Flooring cleats or staples (1.5 to 2 inch)
- ✓ 1.5-inch 18-gauge finish nails
- ✓ Construction adhesive (optional for transitions)
⚠️ Safety Checkpoints & Warnings
- • Wear ANSI-certified safety glasses and hearing protection when operating the miter saw and flooring nailer.
- • Wear heavy-duty knee pads to prevent patellar tendon strain over prolonged installation.
- • Verify subfloor thickness and pipe/wire clearances before driving flooring cleats to avoid puncturing utilities.
📋 Step-by-Step Guide (6 Steps)
Prep Subfloor and Lay Vapor Retarder
Thoroughly sweep and vacuum the subfloor, driving down any protruding screws or staples flush. Roll out 15 lb asphalt felt or rosin paper across the subfloor with edges overlapping by at least 4 inches. Staple the paper down every 2 feet to prevent shifting while walking.
- • Subfloor completely covered by smooth, flat black felt or rosin paper without large bubbles or tears.
- • Overlapping seams running parallel across the room, secured cleanly with staples.
- • Leaving subfloor debris beneath the underlayment, causing squeaks later.
Establish Starting Line and Expansion Spacers
Select the longest exterior or primary straight wall to start your floor. Measure the width of a plank plus a 1/2-inch expansion gap from each end of the wall, and snap a chalk line across these marks. Place 1/2-inch spacers along the starting wall to hold the initial clearance.
- • A sharp, straight chalk line visible across the paper parallel to the starting wall.
- • Spacers placed firmly against base plates every 16-24 inches.
- • Measuring off a bowed wall without squaring, resulting in a crooked floor layout.
Face-Nail and Blind-Nail First Rows
Align the groove side of the first row toward the wall, placing the outer edge exactly along your chalk line. Use an 18-gauge finish nailer to face-nail near the wall edge where baseboards will cover, then blind-nail at a 45-degree angle through the tongue every 6 to 8 inches. Continue with the second row, tapping planks tightly together before blind-nailing.
- • First two rows locked dead straight along the chalk line without gaps between board ends.
- • Nails countersunk cleanly into the tongue without splitting the wood.
- • Using the large flooring nailer too close to the wall where its base plate cannot sit flat.
Rack and Stagger Field Planks
Open planks from 3 to 4 different boxes simultaneously to blend grain and color variations naturally across the floor. Dry-lay ('rack') 4 to 5 rows ahead of your work area, arranging plank end-joints so they are staggered by at least 6 inches from joints in adjacent rows. Avoid 'H-patterns' (joints lining up across alternate rows) or staircase step patterns.
- • A loose array of planks dry-fitted across the floor showing random, well-spaced end joints.
- • Color and board lengths evenly intermingled across the workspace.
- • Grouping short boards together or placing end-joints within 2 inches of an adjacent row's joint.
Fasten Field Rows with Flooring Nailer
Slide the groove of the racked plank over the tongue of the installed row. Set the flooring nailer's shoe squarely over the board's tongue, strike the plunger firmly with the rubber mallet to drive a cleat, and repeat every 6 to 8 inches along each plank. Ensure every board receives at least two cleats placed 2 to 3 inches from each end.
- • Seamless, gap-free joints between plank edges across the entire field.
- • Cleats seated flush below the tongue surface without damaging the wood shoulder.
- • Hitting the flooring nailer at an off-angle, causing the shoe to dent or gouge the board surface.
Rip and Lock the Final Rows
When reaching the final wall where the flooring nailer no longer fits, switch back to blind-nailing with the finish nailer. Measure the remaining gap to the wall at several points, subtract 1/2 inch for expansion, and rip the final row planks to width on a table saw. Pull the last row tight using a flooring pull bar and face-nail near the wall edge.
- • Final ripped row seated tightly against the penultimate row with an even 1/2-inch gap along the far wall.
- • Face nails driven within 1/2 inch of the baseplate where molding will conceal them.
- • Prying the pull bar directly against drywall without a protective backing block, crushing the wall.
Credit: inspired by an original tutorial by Crafted Workshop — watch the original on YouTube.
Don’t have everything?
- No Flooring nailer with mallet? 16-gauge angled finish nailer (for manual tongue-nailing)
- No Tapping block? Scrap piece of tongue-and-groove hardwood