Laminate Flooring Spacers: Pros, Cons, and Buying Guide

Skip the spacers and your laminate floor will buckle within one humid summer. Laminate flooring spacers hold a consistent expansion gap around the perimeter of every floating floor — the gap that lets planks swell and shrink with seasonal humidity without ramming into walls and tenting at the seams. They cost a few dollars and save thousands in callbacks. Here is what types exist, which actually work, and how to use them like a pro.

Why the Expansion Gap Matters

Laminate is a wood-based product. The HDF core absorbs and releases moisture from the air, expanding in summer and contracting in winter. A typical 12 by 16-foot room with a tight install will move 1/4 to 3/8 inch across its width over the course of a year. With no gap, the floor has nowhere to go and either lifts off the subfloor in tents or buckles upward at the seams.

Manufacturers spec a minimum gap of 1/4 to 3/8 inch around all fixed objects: walls, cabinets, pipes, door jambs, hearths, and fixed appliances. Spacers are how you keep that gap consistent during the install.

Types of Laminate Flooring Spacers

Three main designs dominate the market:

• Plastic wedge spacers: simple triangular blocks, usually 3/8 inch thick, sold in packs of 20-50 for $5-$15
• Adjustable U-shaped spacers: step-down design that fits multiple gap sizes from 1/4 to 1/2 inch
• Spring-loaded spacers (Roberts 10-26 or Bullet Tools): apply gentle outward pressure on the last row, $20-$40 per pack of 10

Wedge spacers are the standard issue with most flooring tool kits. Spring-loaded spacers shine on long walls where boards drift away from the wall during install.

Sizing Spacers Correctly

Most laminate manufacturers spec 5/16 to 3/8 inch (8-10mm) for residential rooms under 30 feet in any direction. For rooms longer than 30 feet, bump the gap to 1/2 inch and use a T-molding break in the middle of the run.

Check your specific product’s install sheet. Some waterproof laminates with rigid SPC cores allow gaps as tight as 1/4 inch, while older HDF products may require a full 1/2 inch in coastal or basement installs.

Pros of Using Dedicated Spacers

• Consistent gap width around the entire room — no eyeballing
• Stays in place while you nail or set baseboards back into the wall
• Cheap insurance against $5,000+ replacement jobs from buckling
• Reusable across dozens of installs if you treat them right
• Wedge profiles slide into tight spots between board edges and walls

Cons and Common Workarounds

• Cheap plastic spacers crack under tap-block pressure on long walls
• Some shapes pop out when boards push against them — tape them in place
• Wedge tips can leave small marks on drywall; use painter’s tape on the wall first
• Spring-loaded spacers add cost most DIYers skip, then regret

The most common workaround is using scrap plywood or shims. They work in a pinch but vary in thickness, leading to inconsistent gaps. Buy the proper spacers — at $10 a pack, the savings are not worth the risk.

What to Look For When Buying

Quality spacer features:

• Glass-filled nylon or impact-resistant ABS construction (not brittle PVC)
• Wide base so the spacer does not tip when the board pushes against it
• Rounded contact face that slides off finished walls without scratching
• Stackable design so you can store them clipped together
• Sets that include both T-shaped and L-shaped spacers for inside and outside corners

Roberts, QEP, M-D Building Products, and DEWALT all sell solid wedge spacer packs in the $8-$20 range. Avoid no-name dollar-store packs — the plastic shatters on the first install.

How Many Spacers You Need

Place a spacer every 12-18 inches along all walls and fixed objects. Add one at every inside and outside corner, and one against every door jamb. For a typical 12 by 14-foot room, you will need 30-40 spacers minimum. Buy two packs and keep the spares for the next room.

Step-by-Step Use

Set spacers along the starting wall before laying the first row. Push each board against the spacers, not the wall. As you complete rows two and three, add spacers along the side walls every 16 inches.

Check the gap visually every few rows. If a spacer falls out, replace it immediately — a row that drifts even 1/8 inch will throw off the entire field. For the final row, rip planks to leave the same gap on the opposite wall, then use a pull bar to snug them into place against the spacers.

Leave all spacers in until you are ready to install baseboard or shoe molding. Pull them out one at a time as you work around the room. The trim covers the gap and the spacers come out clean for the next job.

Spacers for Tricky Spots

For door jambs, undercut the jamb with a flush-cut saw and slide the laminate underneath. The spacer goes between the plank end and the doorway threshold. For toilet flanges, hearths, and pipes, cut the plank with a 3/8-inch margin and use a small wedge spacer to hold position while the surrounding boards lock in.

Around kitchen islands and built-in cabinets, leave the gap and cover with quarter-round or shoe molding pinned to the cabinet base, not to the floor.

Bottom Line

Laminate flooring spacers are the single cheapest tool that prevents the most expensive failure mode in floating floor installs. Buy a quality pack, use them religiously, and you will never see a buckled seam. For under $20, it is the easiest insurance policy in flooring.