How to Fasten Wood to Concrete
Secure dimensional lumber to a concrete slab using a hammer drill and concrete screw anchors for framing walls or mounting ledger boards.
- Read the tools, materials, safety notes, and steps below for free.
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- Allow camera and microphone. Point your phone at the work; the coach watches your progress and tells you the next step.
🧰 Required Tools & Equipment
- ✓ Hammer drill
- ✓ Masonry drill bit (matched to screw diameter)
- ✓ Impact driver or socket wrench
- ✓ Tape measure
- ✓ Safety glasses
- ✓ Ear protection
- ✓ Shop vacuum or hand bulb blower
📦 Materials & Supplies
- ✓ Pressure-treated lumber
- ✓ Concrete screw anchors (e.g., Tapcon)
- ✓ Sill seal foam gasket
⚠️ Safety Checkpoints & Warnings
- • Wear ANSI-rated eye protection to guard against high-velocity concrete dust and chips.
- • Use hearing protection during hammer drill operation.
- • Verify no radiant heating pipes or electrical conduits run beneath the concrete drilling zone.
📋 Step-by-Step Guide (5 Steps)
Mark Fastener Layout on Wood
Measure and mark screw positions along the centerline of the wood board at 16 to 24-inch intervals. Ensure marks are at least 3 inches away from the ends of the lumber to prevent wood splitting. Double-check alignment against your wall baseline.
- • Clear pencil crosshairs visible along the centerline of the wood board at regular intervals.
- • Marking too close to the edge or end of the lumber.
Pre-Drill Clearance Holes in Wood
Drill through the marked locations on the wood using a standard wood bit matching the anchor diameter. This prevents the concrete masonry bit from binding on wood fibers. Clear wood shavings away from the surface.
- • Clean, circular through-holes in the lumber without jagged splintering on the back side.
- • Using a masonry bit directly through both wood and concrete in one pass.
Position Lumber and Drill Concrete Pilot Holes
Align the lumber over the concrete floor and insert the masonry bit through the pre-drilled wood holes. Run the hammer drill at full speed with firm downward pressure, drilling at least 1/2 inch deeper into concrete than the screw embedment depth. Use the drill's depth stop or a tape flag on the bit.
- • Drill bit penetrates concrete smoothly to the depth tape marker without tilting off vertical.
- • Drilling too shallow, preventing the screw from seating flush.
Clear Dust from Concrete Holes
Remove the lumber temporarily or align the nozzle directly over each drilled hole. Evacuate all concrete dust using a vacuum or squeeze bulb. Trapped dust will pack tightly and seize the concrete screw prematurely.
- • Hole opening is clean and free of grey concrete powder and debris.
- • Leaving loose concrete powder in the hole.
Drive Concrete Screws
Reposition the lumber (with sill seal underneath if touching slab) over the drilled holes. Drive each concrete screw through the wood and into the concrete hole using steady, moderate speed with an impact driver. Stop driving immediately when the screw head contacts the wood surface.
- • Screw heads sit flush or slightly countersunk into the lumber, with no gap beneath the board.
- • Over-torquing the screw, stripping the concrete threads.
Credit: inspired by an original tutorial by HAUS PLANS ®️ — watch the original on YouTube.
Don’t have everything?
- No Hand bulb blower? Straw with protective safety goggles to blow dust away from face
- No Impact driver? Standard ratchet and socket set