How to Install Vinyl Plank Flooring in a Bathroom
Learn how to lay waterproof click-lock vinyl plank flooring in a bathroom, from prepping around the toilet flange to locking seams and sealing edges against water.
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🧰 Required Tools & Equipment
- ✓ Utility knife with fresh blades
- ✓ Tapping block
- ✓ Rubber mallet
- ✓ Pull bar
- ✓ Oscillating multi-tool or flush-cut saw
- ✓ Tape measure
- ✓ Speed square
📦 Materials & Supplies
- ✓ Waterproof click-lock vinyl plank flooring
- ✓ 1/4-inch flooring spacers
- ✓ 100% silicone sealant
- ✓ New wax or rubber toilet seal
⚠️ Safety Checkpoints & Warnings
- • Always cut utility knife strokes away from your body and keep your free hand behind the cutting edge.
- • Wear eye protection when trimming door casings with a multi-tool.
- • Verify water supply to the bathroom toilet is fully turned off before disconnecting fixtures.
📋 Step-by-Step Guide (7 Steps)
Prep the Subfloor and Undercut Door Casings
Ensure the subfloor is flat, clean, and completely dry with the toilet removed. Place a scrap piece of vinyl plank upside down against the door casing, rest your saw blade flat on top, and cut through the bottom of the jamb casing so planks can slide underneath cleanly.
- • Subfloor is bare, smooth, and free of debris.
- • Door casings have a horizontal gap matching plank thickness.
- • Cutting door jambs too high, leaving an unsightly visible gap.
- • Leaving old wax or grit on the subfloor.
Establish the Starting Line and Set Spacers
Measure the room width to verify your final row won't end up less than 2 inches wide; rip down the first row slightly if necessary. Place 1/4-inch spacers against the longest uninterrupted starting wall to maintain the required expansion perimeter.
- • Spacers evenly distributed along the starter wall every 12 to 18 inches.
- • First layout line running straight and parallel to the main wall.
- • Failing to leave an expansion gap against the drywall.
- • Starting with a full-width plank that leaves a pencil-thin strip at the far wall.
Lock the First Row and Stagger Joints
Assemble the first row by inserting the short end tongue into the groove at an angle and dropping it flat. Start the second row using a cutoff piece from the first row, ensuring the end joints are staggered by at least 8 inches from row to row.
- • End joints are perfectly flush with zero visible hairline gaps.
- • Staggered seams creating an alternating, natural pattern across rows.
- • Creating an 'H' or step pattern where end joints are too close together.
- • Hitting the plank tongue directly with a mallet, crushing the locking mechanism.
Engage Long Grooves and Tap Rows Tight
Angle the long tongue of each new plank into the groove of the preceding row at roughly a 30-degree angle, lower it, and slide it to meet the short end. Place your tapping block against the outer edge and tap gently with the rubber mallet until the joint clicks fully flush.
- • Entire length of the long seam is completely flat and seamless.
- • Plank sits completely horizontal without lifting up at the edges.
- • Over-striking with the mallet and cracking the fragile vinyl click groove.
- • Tapping while the plank is held at too steep an angle.
Cut Around the Toilet Flange and Obstacles
Measure and mark the radius of the toilet flange onto your plank. Use a utility knife or shears to cut a semicircular notch, ensuring the edge gets within 1/4 to 1/2 inch of the flange bolts without covering the bolt slots or rising above the flange ring.
- • Plank notches neatly around the circular flange ring.
- • Flange bolt slots and mounting holes remain completely visible and accessible.
- • Covering the toilet flange bolt channels with flooring.
- • Cutting the opening larger than the base footprint of the toilet.
Fit the Final Row with a Pull Bar
Rip the final row of planks to width, accounting for the 1/4-inch perimeter expansion gap. Drop the long edge into the previous row's groove, place the hooked end of the pull bar over the outer edge against the wall, and strike the raised anvil of the pull bar with your mallet to pull the seam tight.
- • Final row pulled completely flush with the penultimate row.
- • Consistent 1/4-inch gap visible between the final row and the base drywall.
- • Using the pull bar on the soft top wear layer instead of catching the cut core edge.
- • Prying against the drywall without a protective block, punching a hole in the wall.
Waterproof the Perimeter and Reinstall Fixtures
Remove all perimeter spacers around the room. Run a continuous bead of 100% silicone sealant in the expansion gap around the bathtub or shower base and around the toilet flange to prevent moisture from slipping underneath the floating floor.
- • All spacers removed from the entire perimeter.
- • Smooth, continuous bead of silicone sealing the gap along the tub basin and flange.
- • Leaving rigid spacers trapped behind baseboards.
- • Using water-based painter's caulk instead of 100% silicone around wet areas.
Credit: inspired by an original tutorial by Fix This House — watch the original on YouTube.
Don’t have everything?
- No Oscillating multi-tool? Hand flush-cut jamb saw
- No Flooring spacers? 1/4-inch scrap wood shims or plywood offcuts
- No Tapping block? A 6-inch scrap offcut of vinyl plank with the lock profile intact