How to Install Vinyl Plank Flooring Without Removing Baseboards
You can install vinyl plank flooring without removing the baseboards, but only if you leave a 1/4-inch expansion gap between the plank edge and the baseboard instead of cutting planks tight against it. Skip that gap and a 40-foot run of vinyl can push up to 1/2 inch in hot weather, buckling the floor. This guide covers undercutting door casings, sizing the gap correctly, and hiding it with quarter-round trim nailed to the baseboard, not the floor.
Should You Remove the Baseboards First?
No — leaving your baseboards in place is standard practice for vinyl plank flooring, and it saves hours of trim work. Removing them only makes sense if you’re also replacing damaged baseboards or repainting walls down to the floor as part of a larger remodel. The trade-off: instead of a perfectly flush edge, you leave a 1/4-inch expansion gap around the room’s perimeter and cover it with quarter-round or shoe molding attached to the baseboard.
Tools and Materials You’ll Need
- Vinyl plank flooring — check the wear layer thickness before you buy; see our 6 mil vs. 12 mil comparison if you’re unsure which to pick
- 1/4-inch flooring spacers to hold the expansion gap while you work
- Flush-cut (pull) saw for undercutting door casings
- Utility knife and a metal straightedge
- Tapping block and rubber mallet
- Quarter-round or shoe molding to match your baseboard color
- 18-gauge brad nailer or hammer and finish nails — if you’re unsure which nail gauge fits your trim, see our finish nail sizing guide
- Wood putty to fill nail holes — see our guide to using wood putty
- Miter saw or coping saw for cutting molding corners — our molding corner-cutting guide covers both methods
Best Expansion-Gap Pick
NAACOO 20-Pc Flooring Spacers (1/4″ & 1/2″ Gap)
Rigid triangle spacers that hold a consistent 1/4" or 1/2" gap against the baseboard while you lay planks, so the gap doesn’t drift row to row.
- Best for: keeping the expansion gap exact along every wall
- Why we picked it: the triangular shape won’t tip over like flat shims when you tap planks into place
- Main drawback: the 1/4" and 1/2" sizes are built into one piece, so you can’t mix a custom gap size
Compare more baseboard-install tools
 Option 1 Bestlaminate Solid Pine Quarter Round Trim, 20-Pc
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 Option 2 Temple Tool Co. Japanese Flush Cut Pull Saw
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 Option 3 WORKPRO 2-in-1 18GA Pneumatic Brad Nailer
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Step-by-Step: Installing Vinyl Plank Flooring Without Removing Baseboards
- Prep the subfloor: Clear the room and vacuum or sweep the subfloor clean of dust, grit, and debris that could telegraph through the new planks.
- Undercut the door casings: Lay a scrap piece of your new flooring flat against the casing as a depth guide, then use a flush-cut saw to trim the bottom of the door jamb and casing so planks can slide underneath instead of being scribe-cut around it.
- Set spacers along the walls: Place 1/4-inch spacers between the baseboard and where your first row will sit, on every wall the flooring touches.
- Lay the first row: Starting against the longest, straightest wall, click the planks together and work across the room, staggering the end joints between rows by at least 6 inches.
- Cut planks to fit: Score and snap planks with a utility knife and straightedge for straight cuts, or use a jigsaw for cuts around vents and other obstacles — keep the spacer gap on every wall as you go.
- Work across the room: Continue laying rows toward the opposite wall, checking every few rows that the planks are staying flat, level, and tight at the seams.
- Install the quarter-round molding: Once the floor is fully laid, pull the spacers, cut molding to length with a miter saw, and nail it into the baseboard only — never into the flooring — then fill nail holes with wood putty.
Cut-Tight vs. Expansion-Gap Method: Why the Gap Wins
Most quick DIY tutorials skip straight to “cut the planks to fit around the baseboard,” which looks clean on day one but ignores how vinyl actually behaves once it warms up. Here’s how the two approaches compare:
| Method | Long-Term Risk | Best For |
|---|---|---|
| Cut-tight (planks butted directly against the baseboard) | No room to expand — can buckle, ridge, or pop up within months as temperatures change | Small accent areas only, never a full room |
| Expansion-gap + trim (1/4" gap, covered by quarter-round nailed to the baseboard) | Floor can move freely with the seasons; most manufacturer warranties require it | Any full-room vinyl plank installation |
Floating floors need an expansion gap around the entire perimeter of the room to move with seasonal changes in temperature and humidity without buckling.
— adapted from Lowe’s vinyl plank flooring installation guide
Common Mistakes to Avoid
- Nailing quarter round into the flooring instead of the baseboard. That locks the planks in place and defeats the entire purpose of the expansion gap.
- Skipping the door-casing undercut. Trying to scribe-cut vinyl around a casing instead leaves a visible, uneven line at every doorway.
- Sealing the expansion gap solid with caulk. A floating vinyl floor needs that space to move — a small bead of flexible, color-matched caulk is fine for a hairline gap trim can’t fully cover, but fully sealing the gap can cause the floor to buckle or ridge as it expands.
- Eyeballing the gap instead of using spacers. An inconsistent gap looks sloppy once the quarter-round goes on and can leave some sections too tight to expand.
📊 A 40-foot run of vinyl plank flooring can expand up to 1/2 inch in hot weather — if the expansion gap is fully blocked or sealed, that movement has nowhere to go and shows up as bumps or ridges in the floor instead.
Frequently Asked Questions
How big of a gap do I need between vinyl plank flooring and the baseboard?
Leave at least a 1/4-inch expansion gap around the entire perimeter of the room, including where the flooring meets the baseboard. This lets the vinyl expand and contract with temperature changes without buckling, and quarter-round or shoe molding then covers the gap for a finished look.
Do you nail quarter round to the baseboard or the floor?
Nail quarter-round or shoe molding into the baseboard, never into the flooring itself. Nailing through the vinyl plank locks it in place and prevents the expansion gap from doing its job, which can cause buckling later.
Do I need to undercut door casings for vinyl plank flooring?
In most cases, yes. Use a flush-cut (pull) saw resting on a scrap piece of your new flooring to trim the bottom of door casings and jambs so planks can slide underneath, instead of trying to scribe-cut vinyl around every doorway.
Should you caulk the gap between vinyl plank flooring and the baseboard?
No — don’t fully seal the expansion gap with caulk. A floating vinyl plank floor needs that space to move, and sealing it solid can cause the floor to buckle or ridge as it expands in warm weather. Quarter-round or shoe molding is the standard way to hide the gap without blocking movement; a small bead of flexible, color-matched caulk is only appropriate for a hairline gap that trim can’t fully cover.
Is it better to remove the baseboards when installing vinyl plank flooring?
Not necessarily. Leaving baseboards in place is faster and avoids repainting or repairing the wall afterward. Removing them first gives a slightly cleaner, flush look and makes sense if you’re already replacing trim or repainting down to the floor as part of a larger remodel.
Conclusion
Installing vinyl plank flooring without removing baseboards comes down to one detail most quick tutorials skip: the expansion gap. Leave a 1/4-inch gap at the walls, undercut your door casings, and nail quarter-round into the baseboard instead of the floor, and the shortcut holds up for years instead of buckling within a season. For obstacles like a toilet flange, see our guide on installing vinyl plank flooring around a toilet, and for tricky corner cuts on the trim itself, our guide to cutting vinyl plank flooring and our plank direction guide cover the rest of the room.
