Ask three people how thick gym flooring should be and you will usually hear the same answer: thicker than you think. The honest answer is that it depends on what you drop, how often you drop it, and what is underneath. A 15mm tile under a rowing machine in a spare bedroom is doing a completely different job from a 43mm tile in front of the rack in a converted garage.
Below, we work through the four thicknesses you will see most often – 15mm, 20mm, 30mm and 40mm – by what you actually do on them. We also cover the part most people leave until the tiles arrive: the edges, ramps and corners that finish a floor safely. If you are new to rubber flooring, our guide to choosing rubber gym flooring explains the types of rubber first.
Start with what you drop, not the number on the tile
Thickness is really a stand-in for something else: how much impact the floor can absorb before the force reaches your subfloor, your plates or your joints. That depends on three things – the heaviest weight that will hit the floor, how often it does, and from what height.
A kettlebell set down between swings is a very different load from a loaded barbell dropped from overhead. So before you compare tiles, write down the heaviest thing you will drop and where in the room it lands. That one answer narrows the choice more than anything else.
Gym flooring thickness at a glance
Here is how the four common thicknesses line up against typical use, with the drop ratings listed on the product pages of tiles we stock.
| Thickness | Suits | Example drop rating |
|---|---|---|
| 15mm | Treadmills, bikes, rowers and cross trainers; bench work, stretching, light dumbbells and kettlebells | Sprung 15mm PRO: drops up to 110kg |
| 20mm | General strength training, racks and benches, kettlebells, most PT studios | Sprung 20mm PRO: drops up to 140kg |
| 30mm | Heavy free weights, deadlifts from the floor, dumbbells dropped from shoulder height | Sprung 30mm PRO: drops up to 200kg |
| 40mm and above | Olympic lifting, repeated drops from overhead, dedicated drop zones | Sprung 43mm PRO Anti-Shock: up to 250kg; Sprung 50mm: up to 300kg |
Prices below are as listed on 31 October 2026 – check the product page before ordering.
15mm – cardio machines and lighter training
15mm is the thinnest tile most home gyms need. It protects the floor under a treadmill, bike or rower, takes the scuffs from a bench, and gives you a firmer, grippier surface for stretching and bodyweight work. Sprung describes its 15mm PRO tile as suited to light-to-medium impact and comfortable under bikes, trainers and rowers.
Where 15mm runs out is dropped weight, and this is where ratings vary most between brands. The Sprung 15mm PRO (£31.99 per 1m × 1m tile) is rated for drops of up to 110kg, but many 15mm tiles carry no drop rating at all. Where a tile has no published rating, our rule of thumb is not to drop anything heavier than about 20kg on 15mm.
When someone in Ilford asked us whether a 15mm tile would cope with dropped weights and a heavy functional trainer, that was the advice we gave. We sent a 20mm sample alongside the 15mm so they could feel the difference in hand. Someone in Taunton asked for both thicknesses for the same reason, and seeing them side by side settles it faster than any spec sheet.
20mm gym flooring – the all-rounder for strength training
20mm is where most home gyms and PT studios land. It handles racks, benches, adjustable dumbbells and kettlebells set down hard, and it takes the occasional dropped weight without complaint. Sprung calls its 20mm PRO tile (£34.95 per 1m × 1m) its most popular, rated for drops of up to 140kg – roughly a 20kg Olympic bar with 60kg on each side.
It is also the thickness we suggest most often for a rack and bench in a garage or spare room. A recent enquiry for a 2m × 2.3m space, with a rack, a bench and no more than 100kg on the floor at once, is a typical 20mm job, and we come back to it in the edging section below. Our home gym ideas guide covers how to plan the rest of that kind of space.
20mm tiles are not all equal, though. The GymGear 20mm Premium Black tile (£24.99 per 1m × 0.5m, or £49.98 per m²) is described for training zones where lighter weights and kettlebells may be dropped. The Sprung 20mm PRO Interlocking tile (£40.84 per 1m × 1m) carries the 140kg rating with hidden connectors and a 4-year warranty. If you will regularly drop loaded barbells, check the rating rather than assuming 20mm covers it.
30mm gym flooring – heavy free weights and deadlifts
Once you are pulling heavy deadlifts from the floor or dropping dumbbells from shoulder height, 30mm earns its extra cost. The added depth spreads the impact further before it reaches the subfloor, and the floor feels noticeably more solid underfoot. Sprung rates its 30mm PRO tile (£47.49 per 1m × 1m) for drops of up to 200kg.
30mm helps with noise too. GymGear lists 28dB of sound insulation for its 30mm Premium Black tile (£29.99 per 1m × 0.5m, or £59.98 per m²), against 20dB for its 20mm version. In a semi-detached house in Leeds or a first-floor studio above a shop in Manchester, that gap is worth paying for where the weights land.
40mm and above – Olympic lifting and drop zones
Cleans and snatches dropped from overhead, and heavy deadlifts done several times a week, need the thickest flooring. Sprung's tiles at this level are 43mm and 50mm rather than 40mm. The 43mm PRO Anti-Shock (£74.47 per 1m × 1m) is rated for drops of up to 250kg, and the 50mm PRO Anti-Shock (£104.50) for up to 300kg, both with a studded underside for stability.
At exactly 40mm we stock the GymGear 40mm Premium Black tile (£39.99 per 1m × 0.5m), made for weight drop zones, and the Jordan Activ SHOX tile (from £46 per 1m × 0.5m). Jordan publishes a 52% force reduction and 30dB of noise reduction for SHOX, useful figures to compare if noise is your main concern.
If you lift Olympic-style several times a week, consider a lifting platform rather than ever-thicker tiles. Jordan's Olympic Lifting Centres – a 30mm solid oak centre designed to sit flush within your rubber flooring – start at £654 for 1.5m × 1m. You stand on firm, flat timber, and the rubber either side takes the drops.
Density matters as much as thickness
Two tiles of the same thickness can behave very differently, because density – how tightly the rubber is packed – decides how well a tile resists a dropped weight. A denser tile is harder and spreads the load further; a less dense one has more cushion and bounce. Neither is wrong, but they suit different training.
The easiest way to compare is weight per square metre. If a product page gives a density figure, use it: Sprung lists 950–1,000kg/m³ for its PRO range, which works out at roughly 19–20kg for a 20mm, 1m × 1m tile. If a page only gives the tile weight, divide it by the area the tile covers. Jordan's 40mm SHOX tile weighs 29.5kg for half a square metre – 59kg per m² – which tells you it is a very dense tile.
You don't need one thickness for the whole room
Sprung's flooring team makes a point we agree with: most gyms do not need the thickest tile everywhere. A typical home gym or small studio has a general training area, a spot in front of the rack where weights actually hit the floor, and perhaps a cardio corner. Each asks something different of the floor.
Matching the tile to the zone is often better value. In a double garage in Cheltenham, that could mean 20mm across the room and a 2m × 2m drop zone of 43mm in front of the rack, rather than 43mm wall to wall. Our garage gym guide covers the groundwork underneath, from damp to concrete.
The thing to plan carefully is where two thicknesses meet. A 20mm tile beside a 43mm tile leaves a 23mm step, and most edge ramps are sized to slope from tile height down to a bare floor rather than from one thickness to another. Talk to us about the transition before you order, and we will work out the cleanest way to finish it.
Edges, ramps and corners: what to order
Edging is the part of a gym floor people most often get wrong. Wherever your flooring stops short of a wall – at a doorway, along the open side of a garage, or in the middle of a room – it leaves a raised edge of 15–43mm. That is enough to catch a toe or a trolley wheel, so every open side needs a ramp.
Three rules cover most floors.
Match the thickness and the range. A 30mm tile needs a 30mm ramp, and the ramp should come from the same range as the tiles. GymGear's 20mm, 30mm and 40mm edges lock into compatible GymGear tiles with supplied connectors, and Sprung sells matching ramps for its PRO tiles. Mixing brands can leave you with edges that do not join, even at the same thickness.
Count your open sides before you order. A side against a wall needs nothing – lay the cut edge of the tiles there, where it is hidden. Every side open to the room needs ramps along its full length, and every outside corner where two open sides meet needs a corner piece.
Allow for the ramp's footprint. Ramps add width beyond the tiles: Sprung's 20mm ramp is 200mm deep and Jordan's 40mm SHOX ramp is 250mm. In a doorway or a tight room that matters, so check door clearance and walking space as well as the tile area.
A worked example
Take that 2m × 2.3m rack-and-bench space, with two walls meeting in one corner. That leaves one 2m side and one 2.3m side open – 4.3m of edge, so five 1m ramp lengths, plus one corner piece where the open sides meet. One row of tiles is trimmed to fit the 2.3m length and laid against a wall, so the cut never shows.
In the GymGear 20mm Premium Black tile, that is ten tiles at £24.99, five 1m ramped edges at £18.99 and one 20mm corner ramped edge at £21.99 – £366.84 in total. For a higher drop rating, the Sprung 20mm PRO Interlocking tile has its own matching edge ramps and corners.
What to order at a glance
| Where | What to order |
|---|---|
| Side against a wall | No edging – lay the cut edge of the tiles here |
| Side open to the room | Ramped edge along the full length, same thickness and range as the tiles |
| Outside corner where two open sides meet | One corner piece |
| Doorway or threshold | Ramped edge – check the ramp depth and door clearance |
| Floor in the middle of a room | Ramps on all four sides, plus four corner pieces |
| Thicker drop zone beside thinner flooring | Talk to us before ordering |
Two practical notes from the product pages. GymGear's 15mm edges are too thin to take the connector pegs, so they are loose-laid or fixed with floor adhesive or heavy-duty double-sided tape. And heavy rubber edges can arrive slightly curved from being rolled for delivery – laid flat under weights for 24–48 hours, they relax and sit flush. You will find matching pieces in our edges, ramps and corners collection.
Frequently asked questions
Is 20mm gym flooring thick enough for deadlifts?
For deadlifts lowered under control, usually yes – especially a tile with a published drop rating, such as Sprung's 20mm PRO at up to 140kg. If you drop heavy deadlifts from the top or train them several times a week, 30mm or a dedicated drop zone is the safer choice.
What thickness of gym flooring do I need under a treadmill?
15mm is plenty under a treadmill, bike, rower or cross trainer. Go thicker only if the same area is also used for free weights.
Are thick gym mats for home worth it for noise?
Thicker tiles do cut more noise. GymGear lists 20dB of sound insulation for its 20mm Premium tile, 28dB for 30mm and 30dB for 40mm. In a terrace or flat, that difference is worth having in the area where weights land.
Can I mix different thicknesses in one gym?
Yes, and it is often better value than one thickness wall to wall. Plan the join between the two before you order, because the step between them needs finishing safely.
Can I add more tiles to my existing floor later?
Often, but check first. Tiles of the same thickness from different ranges, or even different batches, can differ in size, finish and joining system. Tell us what you have and we will check what matches.
Choosing your thickness
Start with the heaviest thing you will drop and where it lands. For cardio and lighter training, 15mm does the job, and for general strength work 20mm is the sensible default.
Heavy free weights call for 30mm, and Olympic lifting for 40mm and above – ideally only where the drops actually happen. Then count your open sides and order the edges with the tiles, not afterwards.
Not sure which thickness suits your space? Speak to an expert on 0333 880 7174 and we will talk it through, then send free samples so you can compare thicknesses in hand before you commit. PT studios, physio clinics and office gyms are as welcome as home buyers, and orders over £500 come with free UK delivery. Browse the full range in our gym flooring collection, or go straight to rubber gym flooring tiles.
