Before You Begin
Installing reclaimed wood flooring is a rewarding project that delivers a floor with more character, depth, and history than any new product can match. But reclaimed wood requires more preparation and care than new pre-finished flooring. The payoff is worth it — a properly installed reclaimed wood floor can last a century or more — but you need to approach the project with patience and attention to detail.
Step 1: Material Selection and Ordering
Start by choosing your species, width, and grade. For flooring, the most popular reclaimed species are heart pine (warm amber tones, exceptional hardness), white oak (classic, stable, works with any decor), and mixed hardwood (varied species for a rustic, eclectic look).
Measure your floor area carefully and order 15% to 20% more material than your square footage calculation indicates. Reclaimed flooring requires more waste allowance than new because individual boards may have defects, end damage, or inconsistencies that need to be cut around. A 15% overage is minimum; 20% is safer for character-grade material.
Specify your desired milling profile: tongue-and-groove is standard for nail-down installation, while square-edge boards can be used for glue-down or face-nailed applications. We mill our reclaimed flooring to standard 3/4-inch thickness with a 1/4-inch tongue-and-groove profile.
Step 2: Acclimation
This step is non-negotiable. Reclaimed flooring must acclimate in the room where it will be installed for a minimum of two weeks — ideally three to four weeks in extreme seasons. Break open all packaging, stack the flooring with spacers (stickers) between layers for air circulation, and run the HVAC system at normal occupancy settings.
Use a pin-type moisture meter to test the flooring and subfloor. The moisture content difference between the two should be 2% or less for boards up to 3 inches wide, and 1% or less for boards wider than 5 inches. For most interior environments in the Mid-Atlantic, target 7% to 9% moisture content in the flooring.
Step 3: Subfloor Preparation
The subfloor must be flat, dry, clean, and structurally sound. For nail-down installation over a wood subfloor, use at least 3/4-inch plywood or OSB. Check for flatness with a long straightedge — the subfloor should be flat to within 3/16 inch over a 10-foot span. High spots can be sanded down; low spots can be filled with a cementitious leveling compound.
If you are installing over a concrete slab, a moisture barrier is essential. Lay 6-mil polyethylene sheeting over the concrete, overlapping seams by 8 inches and taping them with moisture-barrier tape. Then install 3/4-inch plywood sleepers or a floating plywood subfloor system on top of the barrier.
Install 15-pound asphalt felt (tar paper) or rosin paper over wood subfloors as a moisture retarder and to reduce squeaks. Overlap the paper 4 inches at the seams and staple it flat.
Step 4: Layout Planning
Before nailing any boards, dry-lay several rows to plan your layout. Reclaimed flooring varies in color, width, and character, so you want to distribute the variation evenly across the room. Avoid clustering boards of similar color or character in one area.
Start your first row along the longest, most visible wall. Snap a chalk line parallel to that wall, offset by the width of your first board plus a 3/4-inch expansion gap. The expansion gap is critical — reclaimed wood will move seasonally, and the gap (hidden by baseboard trim) gives it room to expand without buckling.
Racking the Floor
Open multiple bundles of flooring and mix boards from different bundles as you work. This ensures color and character variation is spread evenly across the floor. Stagger end joints by at least 6 inches (12 inches is better) between adjacent rows, and avoid creating patterns where end joints align in a visually obvious way.
Step 5: Installation
First Three Rows
The first three rows set the alignment for the entire floor, so take extra care. Face-nail the first row through the top of the board into the subfloor, 1/2 inch from the grooved edge, using 8d finish nails. Pre-drill to prevent splitting. These nail holes will be covered by the baseboard.
For rows two and three, use a pneumatic flooring nailer to blind-nail through the tongue at a 45-degree angle. Set the nailer pressure so the cleat pulls the board tight against the previous row without denting the tongue. Check alignment against your chalk line frequently — small errors compound across the room.
Continuing Across the Room
Work across the room, blind-nailing each board through the tongue. Place nails every 8 to 10 inches along the length and within 2 inches of each end. Use a rubber mallet to tap boards tight before nailing — but tap the sacrificial block against the tongue, not the board itself, to avoid damaging the edge.
Check your moisture meter readings on each board as you install. If any board reads more than 2% above or below your target, set it aside and let it acclimate further. One wet board in a dry floor will shrink and leave a visible gap; one dry board in a wet floor will swell and push against its neighbors.
The Last Three Rows
As you approach the far wall, the flooring nailer may not fit. Switch to face-nailing, pre-drilling each hole to prevent splitting. Rip the last row to fit, maintaining the 3/4-inch expansion gap. Face-nail the last row and plan for the baseboard to cover the nail holes and expansion gap.
Step 6: Sanding
Most reclaimed flooring installations require sanding to level the floor and prepare the surface for finishing. Even well-milled reclaimed flooring will have slight thickness variations, minor cupping, and surface roughness that need to be addressed.
Use a drum sander or orbital floor sander, starting with 36-grit or 40-grit paper to level the floor and remove major roughness. Progress through 60-grit, 80-grit, and finish at 100-grit or 120-grit. Sand with the grain, overlapping each pass by 50%. Edge-sand the perimeter with an edger sander, matching the grit progression.
After final sanding, vacuum thoroughly and tack-wipe the entire floor with a microfiber cloth dampened with mineral spirits to remove all dust before finishing.
Step 7: Finishing
Apply your chosen finish within 24 hours of final sanding to prevent the bare wood from absorbing moisture or dirt. For reclaimed flooring, we recommend either a penetrating hardwax oil (for a natural, low-sheen look) or an oil-based polyurethane in satin sheen (for maximum durability).
Apply the first coat with a high-quality applicator, working with the grain. Allow the manufacturer's recommended dry time, then lightly screen (abrade) the surface with a 150-grit screen and tack-wipe before applying the second coat. Most polyurethane systems require three coats for flooring; oil finishes may need two to three coats depending on the product.
Allow the final coat to cure for the manufacturer's recommended time — typically 48 to 72 hours for polyurethane and 5 to 7 days for oil finishes — before placing furniture or allowing normal foot traffic.
Living with Your Reclaimed Floor
A properly installed and finished reclaimed wood floor is a low-maintenance surface. Use felt pads under furniture legs, keep the floor clean with a dry microfiber mop, and control indoor humidity between 35% and 55% year-round. Expect some seasonal movement — even the best acclimation and installation cannot eliminate all seasonal expansion and contraction. Minor gaps in winter and tightening in summer are normal and not a defect.