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Best Interlocking Floor Tiles of 2027: 10 Picks Ranked by Material, Thickness, and Load

The best interlocking floor tiles for home gyms, ranked on material density, thickness, tile and pack size, edge finish.

HGBy HomeGymLedger Research TeamIndependent editorial teamLast updated How we evaluateResearch-based assessment · Interlocking Floor Tiles
Specs verified against manufacturer docs
No paid placements
Reader-supported, independently funded
Updated 2026-11-01
Best Interlocking Floor Tiles of 2027: 10 Picks Ranked by Material, Thickness, and Load

Our top picks at a glance

ProsourceFit Puzzle Exercise Mat EVA Foam Interlocking Tiles
Best Overall Foam Tile

ProsourceFit Puzzle Exercise Mat EVA Foam Interlocking Tiles

Bodyweight training, yoga and mobility corners, and light dumbbell work on a hard subfloor.

Rubber King Interlocking Rubber Floor Tiles
Best Rubber Tile

Rubber King Interlocking Rubber Floor Tiles

Dumbbell areas, rack zones, and garage gyms that need load spread and impact muting in a tile format.

BalanceFrom Puzzle Exercise Mat with EVA Foam Interlocking Tiles
Best Budget Coverage

BalanceFrom Puzzle Exercise Mat with EVA Foam Interlocking Tiles

Covering a large garage or basement area for general training where budget per square foot decides.

The short answer

For most home gyms, start by material, not by price. Light training and floor work belong on the ProsourceFit Puzzle Mat or the thicker BalanceFrom packs. Real lifting belongs on rubber: the Rubber King interlocking tiles for general weight areas and Greatmats rubber tiles for a dedicated lifting zone. Finished rooms that must look like rooms point to Forest Floor or Sorbus printed foam, and working garages point to IncStores Nitro hard tiles with a training mat laid over them.

The best interlocking floor tiles, ranked

All picks ranked side by side
PickThicknessMaterialTile sizeCoveragePrice
ProsourceFit Puzzle Exercise Mat EVA Foam Interlocking TilesBest Overall Foam Tile1/2 inHigh-density EVA foam, water-resistant surface24 x 24 in per tile24 sq ft per 6-tile pack (larger packs also sold)Check price
Rubber King Interlocking Rubber Floor TilesBest Rubber Tile6 mm and 10 mm versions soldRecycled rubber with colored fleck optionsInterlocking tiles, size varies by versionSold in multi-tile packs; check pack square footage on the listingCheck price
BalanceFrom Puzzle Exercise Mat with EVA Foam Interlocking TilesBest Budget Coverage1/2 in and 1 in versions soldEVA foam with double-sided non-slip texture24 x 24 in per tile24 sq ft and larger packs depending on versionCheck price
IncStores Impact Foam Rubber Floor Tiles (3/4 in, 2x2 ft)Best Lifting Zone3/4 in (19 mm class)Recycled rubber top surface bonded to a foam core (not solid rubber)2 x 2 ft interlocking squares4 sq ft per tile; listed per pack on each versionCheck price
We Sell Mats EVA Foam Interlocking Puzzle TilesBest Colors and Sizes3/8 in to 1 in versions by product lineEVA foam, lead and latex free per maker12 x 12 in and 24 x 24 in lines soldPack coverage varies by tile size; listed per packCheck price
Forest Floor Thick Printed EVA Foam Interlocking TilesBest Finished-Room Look3/8 in thick printed tile lineEVA foam with printed film surface24 x 24 in per tileListed per pack; packs sized for room zonesCheck price
IncStores Nitro Interlocking Garage Floor TilesBest Garage Tile3/8 in class rigid tile (see version listing)Polypropylene copolymer, UV stable per maker12 x 12 in per tileSold by the pack and by the carton; square footage listed per optionCheck price
Sorbus Wood Grain EVA Foam Interlocking Floor TilesBest Living Room Compromise3/8 in (10 mm) classEVA foam with printed wood grain surface12 x 12 in and 24 x 24 in versions soldPack coverage listed per option, commonly 16 to 48 sq ftCheck price
Yes4All Interlocking Exercise Foam Mat TilesBest Rental Friendly1/2 in class (thicker versions also sold)High-density EVA foam per maker24 x 24 in per tile12 to 48 sq ft packs depending on optionCheck price
CAP Barbell Puzzle Exercise Mat EVA Foam TilesBest Starter Pack1/2 in class on the standard pack (see version)EVA foam24 x 24 in class tilesPack coverage listed per optionCheck price
ProsourceFit Puzzle Exercise Mat EVA Foam Interlocking TilesProsourceFit

Best Overall Foam Tile

ProsourceFit Puzzle Exercise Mat EVA Foam Interlocking Tiles

The default foam puzzle mat: 24 inch tiles, half inch thick, borders included.

1/2 in
Thickness
24 x 24 in per tile
Tile size
24 sq ft per 6-tile pack (larger packs also sold)
Coverage
The balanced foam buy: half inch cushioning, clean borders, honest pricing, and a tile size that covers a room without waste. It wins the foam class on routine, not on any single spec.

Strengths

  • Half inch EVA gives real knee and elbow cushioning for floor work at a low cost per square foot
  • 24 x 24 in tiles cover a room quickly and the included end borders finish exposed edges cleanly
  • Tiles lift, wash, and replace individually, so one damaged square does not mean a new floor

Limitations

  • EVA dents permanently under rack feet, benches, and stored heavy dumbbells
  • Seams can separate under lateral movements like mountain climbers and sled-style pushes
Key specifications for ProsourceFit Puzzle Exercise Mat EVA Foam Interlocking Tiles
Thickness1/2 in
Tile size24 x 24 in per tile
Coverage24 sq ft per 6-tile pack (larger packs also sold)
MaterialHigh-density EVA foam, water-resistant surface
Edges2 detachable border pieces included per tile

What owners report

Commonly praised
  • Cushioning for floor work is the theme owners repeat most
  • Install takes minutes with no tools or adhesive
  • Replacement tiles match well enough that repairs are invisible
Common complaints
  • Tiles creep apart during high-movement workouts unless taped or wall-bound
  • Indent marks from equipment feet do not recover
  • New tiles carry a foam smell for the first days

Recurring themes from owner reviews on retailers and forums, summarised by our editors. Updated November 2026.

Sources: ProsourceFit puzzle exercise mat product documentation, Amazon listing specifications

Best for: Bodyweight training, yoga and mobility corners, and light dumbbell work on a hard subfloor.
Skip if: You deadlift, drop weights, or plan to park a power rack on it; foam compresses and dents under point loads.

Rubber King Interlocking Rubber Floor TilesRubber King

Best Rubber Tile

Rubber King Interlocking Rubber Floor Tiles

Recycled rubber tiles that behave like gym flooring, not like a mat.

6 mm and 10 mm versions sold
Thickness
Interlocking tiles, size varies by version
Tile size
Sold in multi-tile packs; check pack square footage on the listing
Coverage
Dense recycled rubber in a tile format for buyers who lift real weight but cannot install stall mats. Load spread and seam hold are in a different class from foam.

Strengths

  • Dense recycled rubber spreads rack and bench loads instead of denting like foam
  • Interlocking edges hold together under lateral work far better than foam puzzle teeth
  • Individual tiles can be lifted for cleaning or replacement without disturbing the room

Limitations

  • Rubber odor on opening is strong and needs ventilation time before indoor use
  • Cost per square foot is several times the foam options in this guide
Key specifications for Rubber King Interlocking Rubber Floor Tiles
Thickness6 mm and 10 mm versions sold
Tile sizeInterlocking tiles, size varies by version
CoverageSold in multi-tile packs; check pack square footage on the listing
MaterialRecycled rubber with colored fleck options
EdgesInterlocking edges; border and corner pieces on selected versions

What owners report

Commonly praised
  • Feels like commercial gym flooring once installed
  • Dropped dumbbells land with a thud instead of a bounce or a crack
  • Tiles stay put without adhesive in most installs
Common complaints
  • Initial rubber smell is the most common complaint by a wide margin
  • Cutting thick rubber to fit corners takes real effort and a sharp blade
  • Tile weight makes large orders a heavy delivery

Recurring themes from owner reviews on retailers and forums, summarised by our editors. Updated November 2026.

Sources: Rubber King interlocking tile product documentation, Amazon listing specifications

Best for: Dumbbell areas, rack zones, and garage gyms that need load spread and impact muting in a tile format.
Skip if: Your training is mostly floor work on bare knees and elbows; rubber this dense gives back very little cushion.

BalanceFrom Puzzle Exercise Mat with EVA Foam Interlocking TilesBalanceFrom

Best Budget Coverage

BalanceFrom Puzzle Exercise Mat with EVA Foam Interlocking Tiles

A budget foam mat sold in 1/2 and 1 inch versions with big coverage packs.

1/2 in and 1 in versions sold
Thickness
24 x 24 in per tile
Tile size
24 sq ft and larger packs depending on version
Coverage
The cheapest honest way to cover a large area, with a 1 inch foam version for buyers whose training is floor-heavy and load-light.

Strengths

  • 1 inch version adds genuine impact cushioning for floor work and light drops of small gear
  • Large packs bring the per-square-foot cost down below most foam rivals
  • Double-sided textured surface grips shoes better than smooth foam tiles

Limitations

  • Foam compresses under heavy benches and racks regardless of thickness
  • Pack color and dye lot can vary slightly between separate orders
Key specifications for BalanceFrom Puzzle Exercise Mat with EVA Foam Interlocking Tiles
Thickness1/2 in and 1 in versions sold
Tile size24 x 24 in per tile
Coverage24 sq ft and larger packs depending on version
MaterialEVA foam with double-sided non-slip texture
EdgesRemovable border pieces included

What owners report

Commonly praised
  • Coverage for the money is the headline praise
  • The thicker version makes garage concrete comfortable for full workouts
  • Tiles are easy to trim with a utility knife for corners
Common complaints
  • Seams gap at the edges of large installs without a wall or tape to hold them
  • Surface shows scuffs from shoe pivots over time
  • Thickness makes door clearance a problem in some rooms

Recurring themes from owner reviews on retailers and forums, summarised by our editors. Updated November 2026.

Sources: BalanceFrom puzzle exercise mat product documentation, Amazon listing specifications

Best for: Covering a large garage or basement area for general training where budget per square foot decides.
Skip if: You want a lifting surface for heavy barbell work; even the 1 inch version is foam, not rubber.

IncStores Impact Foam Rubber Floor Tiles (3/4 in, 2x2 ft)IncStores

Best Lifting Zone

IncStores Impact Foam Rubber Floor Tiles (3/4 in, 2x2 ft)

3/4 in interlocking tiles with gym equipment impact in mind: a recycled rubber wear surface over a foam core.

3/4 in (19 mm class)
Thickness
2 x 2 ft interlocking squares
Tile size
4 sq ft per tile; listed per pack on each version
Coverage
3/4 in tiles with a real rubber wear surface for a defined lifting corner. Expensive per foot, correct for equipment impact, with a foam core stated plainly.

Strengths

  • Full 3/4 in of material mutes equipment impact and set-downs better than thin foam tiles
  • Recycled rubber top surface gives real shoe grip and a gym floor feel underfoot
  • 2 x 2 ft interlocking squares cover a zone quickly with a stable, walkable seam pattern

Limitations

  • Foam core under the rubber top: not solid rubber, so extreme repeated drops belong on stall mats
  • Highest cost per square foot group in this guide
  • Tiles are heavy to ship, move, and trim
Key specifications for IncStores Impact Foam Rubber Floor Tiles (3/4 in, 2x2 ft)
Thickness3/4 in (19 mm class)
Tile size2 x 2 ft interlocking squares
Coverage4 sq ft per tile; listed per pack on each version
MaterialRecycled rubber top surface bonded to a foam core (not solid rubber)
EdgesInterlocking puzzle edges

What owners report

Commonly praised
  • Zone stays flat and quiet under equipment in owner reports
  • Impact muting for dumbbell set-downs is the benefit owners describe most clearly
  • Rubber surface cleans and grips like a real gym floor
Common complaints
  • Price for full-room coverage adds up fast
  • Rubber smell needs the same airing-out period as other rubber tiles
  • Cutting to fit around posts and frames is slow work

Recurring themes from owner reviews on retailers and forums, summarised by our editors. Updated November 2026.

Sources: IncStores impact foam rubber tile product documentation, Amazon listing specifications

Best for: A defined equipment corner or lifting zone where impact muting and a grippy rubber surface matter more than acreage.
Skip if: You need true solid rubber for repeated heavy deadlift drops; this tile's core is foam, and solid rubber is the honest tool for that job.

We Sell Mats EVA Foam Interlocking Puzzle TilesWe Sell Mats

Best Colors and Sizes

We Sell Mats EVA Foam Interlocking Puzzle Tiles

Foam tiles in the widest color and thickness range in this guide.

3/8 in to 1 in versions by product line
Thickness
12 x 12 in and 24 x 24 in lines sold
Tile size
Pack coverage varies by tile size; listed per pack
Coverage
The widest option range here. Shared rooms, play and training mixes, and odd room shapes are its home ground.

Strengths

  • Thickness and color options let one product family cover play, fitness, and light gym zones
  • Smaller tile sizes are available for tight rooms where 24 inch squares waste coverage
  • Surface texture is grippy for martial arts and barefoot training styles

Limitations

  • Still EVA foam, with the same denting and compression limits as every foam tile here
  • Ordering in stages risks slight shade differences between batches
Key specifications for We Sell Mats EVA Foam Interlocking Puzzle Tiles
Thickness3/8 in to 1 in versions by product line
Tile size12 x 12 in and 24 x 24 in lines sold
CoveragePack coverage varies by tile size; listed per pack
MaterialEVA foam, lead and latex free per maker
EdgesBorder pieces included on most packs

What owners report

Commonly praised
  • Color choice is the reason owners give for picking this brand
  • Tiles hold up well in playroom and light gym mixed use
  • Customer support for replacement tiles gets repeated praise
Common complaints
  • Puzzle teeth can tear if tiles are pulled apart carelessly
  • Thinner versions feel minimal on concrete
  • Large installs show seams more than rubber does

Recurring themes from owner reviews on retailers and forums, summarised by our editors. Updated November 2026.

Sources: We Sell Mats EVA tile product documentation, Amazon listing specifications

Best for: Multi-use rooms, kids and training shared spaces, and anyone matching a floor to a room color scheme.
Skip if: You need one uniform commercial look in a single dye lot across a very large install ordered in stages.

Forest Floor Thick Printed EVA Foam Interlocking TilesForest Floor

Best Finished-Room Look

Forest Floor Thick Printed EVA Foam Interlocking Tiles

Thicker printed foam tiles in wood and stone looks, by IncStores.

3/8 in thick printed tile line
Thickness
24 x 24 in per tile
Tile size
Listed per pack; packs sized for room zones
Coverage
Thicker printed foam that reads as a real floor at room distance, for basements that host guests as often as workouts.

Strengths

  • Thicker foam than most printed tiles, so the comfort upgrade is real, not just cosmetic
  • Wood and stone prints are more convincing at room distance than basic grain tiles
  • Backed by a flooring retailer with matched trim and border support

Limitations

  • Print and foam both mark under heavy equipment feet
  • Premium foam pricing approaches entry rubber per square foot
Key specifications for Forest Floor Thick Printed EVA Foam Interlocking Tiles
Thickness3/8 in thick printed tile line
Tile size24 x 24 in per tile
CoverageListed per pack; packs sized for room zones
MaterialEVA foam with printed film surface
EdgesRemovable borders included per tile

What owners report

Commonly praised
  • Basements look finished rather than equipped
  • Thickness is noticeable underfoot compared with thin printed tiles
  • Install and trimming are beginner friendly
Common complaints
  • Seams telegraph through the print if the subfloor is uneven
  • Heavy furniture leaves lasting impressions
  • Pattern repeat becomes visible across very large rooms

Recurring themes from owner reviews on retailers and forums, summarised by our editors. Updated November 2026.

Sources: Forest Floor printed tile product documentation, Amazon listing specifications

Best for: Finished basements and spare rooms that split duty between guests, work, and training.
Skip if: You need verified heavy-load performance; printed foam is a comfort and looks product.

IncStores Nitro Interlocking Garage Floor TilesIncStores

Best Garage Tile

IncStores Nitro Interlocking Garage Floor Tiles

Hard polypropylene tiles built for garages that also train.

3/8 in class rigid tile (see version listing)
Thickness
12 x 12 in per tile
Tile size
Sold by the pack and by the carton; square footage listed per option
Coverage
Rigid tiles for the garage that still has to be a garage: vehicles, spills, and rolling loads first, training surface second with a mat on top.

Strengths

  • Rigid polypropylene tiles support rolling loads that would crush foam and mark rubber
  • Raised pattern drains and hides dirt, and tiles hose off in place
  • Snap-together install covers a garage bay fast and lifts for deep cleaning

Limitations

  • Near zero cushioning or impact absorption for dropped weights
  • Hard surface is loud under dropped metal and uncomfortable for floor exercises without a mat on top
Key specifications for IncStores Nitro Interlocking Garage Floor Tiles
Thickness3/8 in class rigid tile (see version listing)
Tile size12 x 12 in per tile
CoverageSold by the pack and by the carton; square footage listed per option
MaterialPolypropylene copolymer, UV stable per maker
EdgesLoop and peg interlock; ramp edges sold separately

What owners report

Commonly praised
  • Garage transformation for the effort is the recurring theme
  • Tiles survive jacks, creepers, and daily vehicle traffic in owner reports
  • Damaged tiles swap out individually in minutes
Common complaints
  • Clicking or hollow sound underfoot in some installs
  • Sun-exposed garages can see expansion movement if no gap is left
  • Not a training surface by itself for lifting or floor work

Recurring themes from owner reviews on retailers and forums, summarised by our editors. Updated November 2026.

Sources: IncStores Nitro tile product documentation, Amazon listing specifications

Best for: Garage gyms where the floor must also handle vehicles, rolling toolboxes, spills, and temperature swings.
Skip if: You drop weights or do floor work; hard plastic tiles protect the subfloor from rolling loads, not impacts or knees.

Sorbus Wood Grain EVA Foam Interlocking Floor TilesSorbus

Best Living Room Compromise

Sorbus Wood Grain EVA Foam Interlocking Floor Tiles

Foam tiles printed to read as wood planks in a finished room.

3/8 in (10 mm) class
Thickness
12 x 12 in and 24 x 24 in versions sold
Tile size
Pack coverage listed per option, commonly 16 to 48 sq ft
Coverage
Wood print foam that lets a training corner exist in a shared living space without looking like equipment.

Strengths

  • Wood grain print makes a training corner pass as flooring in shared rooms
  • Same easy cut, lift, and replace routine as plain foam tiles
  • Softer feel suits stretching, mobility, and light equipment zones

Limitations

  • Print layer can scuff and wear at pivot points, showing foam beneath
  • Load limits are standard EVA limits: no racks, no drops
Key specifications for Sorbus Wood Grain EVA Foam Interlocking Floor Tiles
Thickness3/8 in (10 mm) class
Tile size12 x 12 in and 24 x 24 in versions sold
CoveragePack coverage listed per option, commonly 16 to 48 sq ft
MaterialEVA foam with printed wood grain surface
EdgesDetachable borders included

What owners report

Commonly praised
  • Room-friendly looks are the entire praise story, and owners say it works
  • Guests do not read it as gym equipment at a glance
  • Comfortable for yoga and floor routines
Common complaints
  • Print wear at high-traffic seams
  • Plank pattern alignment takes patience during install
  • Tiles slide on smooth hardwood without an underlay or tape

Recurring themes from owner reviews on retailers and forums, summarised by our editors. Updated November 2026.

Sources: Sorbus wood grain tile product documentation, Amazon listing specifications

Best for: Living room and bedroom gyms where bare puzzle foam would be rejected by the rest of the household.
Skip if: You train with heavy weights; the wood print changes the look, not the foam underneath.

Yes4All Interlocking Exercise Foam Mat TilesYes4All

Best Rental Friendly

Yes4All Interlocking Exercise Foam Mat Tiles

Budget foam tiles with a grippy texture, sold in room-size packs.

1/2 in class (thicker versions also sold)
Thickness
24 x 24 in per tile
Tile size
12 to 48 sq ft packs depending on option
Coverage
Light, cheap, grippy, and fully removable. The renter pattern in tile form.

Strengths

  • Textured surface gives better shoe grip than smooth budget foam
  • Pack sizes map well onto common corner and half-room layouts
  • Tiles are light enough for one person to install a whole room in an afternoon

Limitations

  • Foam load limits apply in full: compression, denting, and seam creep under dynamic work
  • Color consistency between separately ordered packs is not guaranteed
Key specifications for Yes4All Interlocking Exercise Foam Mat Tiles
Thickness1/2 in class (thicker versions also sold)
Tile size24 x 24 in per tile
Coverage12 to 48 sq ft packs depending on option
MaterialHigh-density EVA foam per maker
EdgesDetachable end borders included

What owners report

Commonly praised
  • Grip texture gets specific praise from owners who tried smooth tiles first
  • Good first floor for apartment training
  • Price makes experimenting with layout cheap
Common complaints
  • Separation at seams during jump and lateral work
  • Dents under stored weights within weeks
  • Edges curl slightly in warm rooms on some packs

Recurring themes from owner reviews on retailers and forums, summarised by our editors. Updated November 2026.

Sources: Yes4All interlocking mat product documentation, Amazon listing specifications

Best for: Renters and first-time buyers covering a bedroom corner for general training without adhesive or commitment.
Skip if: Your room is a permanent heavy gym; start with rubber and skip the foam stage entirely.

CAP Barbell Puzzle Exercise Mat EVA Foam TilesCAP Barbell

Best Starter Pack

CAP Barbell Puzzle Exercise Mat EVA Foam Tiles

A no-frills foam puzzle mat from a weights maker, priced to cover ground.

1/2 in class on the standard pack (see version)
Thickness
24 x 24 in class tiles
Tile size
Pack coverage listed per option
Coverage
The minimum viable floor from a weights brand. Buy it knowing it is a first floor, not a final one.

Strengths

  • Low price per square foot from a brand that also makes the weights going on it
  • Light tiles reconfigure in minutes for changing room layouts
  • Surface cleans easily after garage and basement use

Limitations

  • Thinner foam bottoms out quickly under knees on concrete and under any equipment load
  • Puzzle teeth are less precise than premium foam, so seams show
Key specifications for CAP Barbell Puzzle Exercise Mat EVA Foam Tiles
Thickness1/2 in class on the standard pack (see version)
Tile size24 x 24 in class tiles
CoveragePack coverage listed per option
MaterialEVA foam
EdgesEnd borders included

What owners report

Commonly praised
  • Does the basic job for very little money
  • Fine under light equipment and stretching areas
  • Easy to store as a stack when the room is needed for other uses
Common complaints
  • Too thin for comfort on hard floors is the standing complaint
  • Tiles separate during active workouts without tape
  • Foam smell on opening takes days to fade

Recurring themes from owner reviews on retailers and forums, summarised by our editors. Updated November 2026.

Sources: CAP Barbell puzzle mat product documentation, Amazon listing specifications

Best for: First gyms, rental spaces, and temporary setups where the floor may be reconfigured often.
Skip if: You want thick cushioning; this is a thin protective layer, not a comfort mat.

How we chose

01 · Density counted with thickness

A thick soft tile and a thin dense tile solve different problems. We ranked foam on cushioning and seam behavior, rubber on load spread and impact muting, and hard tiles on rolling load and cleanability, instead of pretending one thickness number ranks all three.

02 · Load honesty

Every pick states what it cannot do. Foam tiles that dent under racks say so in their own entry, because the most expensive flooring mistake is buying a comfort product for a structural job and replacing it within a year.

03 · Real pack math

Coverage per pack, tile size, and border inclusion decide the true cost of a room. We compared cost to cover a typical 100 square foot gym corner, including the spare tiles and cuts a real install needs.

04 · Install and repair life

Interlocking formats earn their place on reversibility: no adhesive, individual tile replacement, renter-friendly removal. Products were credited for border systems and swap-out repair, and marked down for seam creep in owner feedback.

FAQ

Interlocking Floor Tiles questions, answered straight

How thick should interlocking tiles be for a home gym?

Half inch foam suits floor work and light training. Heavy dumbbell and rack zones want dense rubber at 8 mm and up, ideally thicker at the drop point. Thickness without density is a comfort spec, not a protection spec, which is why this guide always pairs the two.

Can I put a power rack on foam tiles?

You can, and the foam will dent permanently under the feet and feel unstable under load. A better pattern is rubber tiles or stall mats under the rack footprint, with foam reserved for open floor areas. Many mixed installs in owner feedback end up exactly there.

Do interlocking tiles damage hardwood underneath?

Rubber tiles can leave marks on some finishes and foam can trap moisture against wood. On finished hardwood, lay a protective underlay sheet first and lift tiles periodically in the first months to check. Hard plastic tiles on gritty subfloors can also scuff, so sweep before installing.

How many tiles do I need for a 10 x 10 ft gym corner?

100 square feet of tiles at minimum, plus roughly 10 percent for cuts, borders, and a spare. In 24 inch tiles that is 25 full tiles before cuts. Order the spare in the same batch; later packs can differ slightly in shade or tooth tolerance.

Why do my tiles keep separating?

Usually the install is not bound: a floating foam floor with no wall, tape, or heavy zone to anchor it will walk under lateral movement. Butt the install against a wall, use double-sided carpet tape at perimeter seams, or place the rack zone over the seam lines to pin them.