Gym Flooring and Lifting Platforms: Thickness, Materials and Ramping

Gym flooring has one job: absorb an impact that would otherwise reach the structure, and do it several hundred times a week for a decade without delaminating or smelling.

The mistake is to specify one thickness for the whole floor. Requirements differ sharply by area:

• 8 to 10 mm — cardio areas, studios and circulation. Enough to take machine feet and normal foot traffic.
• 15 mm — general strength and selectorised zones where dumbbells are set down rather than dropped.
• 20 mm — free-weight zones, dumbbell areas and any rack where a bar might be lowered quickly.
• 30 mm or a built-up platform — olympic lifting and any area where a loaded bar is regularly dropped from overhead.

A 20 mm tile absorbs the energy of a dropped 25 kg plate. An 8 mm tile transfers most of it into the slab, and the damage shows up as a cracked screed or, in a first-floor unit, a noise complaint from below.

Most commercial tiles are made from recycled SBR crumb with an EPDM rubber fleck for colour. That is fine and it is what we supply. What varies is the binder and the density. A denser tile with a good polyurethane binder will hold its dimension and its interlock for far longer than a light tile that starts to curl at the edges within a season.

Ask for the thickness tolerance across a batch. Ours is ±0.5 mm, which is what keeps a large floor from developing a visible ripple across tile joints.

Interlocking tiles suit most installations: no adhesive, quick to install, replaceable a tile at a time after damage, and removable if the tenant changes. Adhesive-fixed rolls give a more seamless appearance and are harder to move. If the site is a lease, interlocking is the pragmatic answer.

This is where cheap flooring installations fail visibly. Stacking flat strips to build a ramp produces a stepped edge within weeks. Ramps and trims should be single mouldings, cut to size, with the same material as the tile. Check that the ramp is supplied with the tile order rather than discovered later.

An olympic lifting platform is a floor within a floor: a base layer, a rubber shock layer and a top surface of either rubber or timber with a steel or timber centre. The details that matter are that the platform is isolated from the surrounding floor so vibration does not telegraph into the slab, that the centre section is at the same finished level as the rubber, and that the whole assembly sits inside a frame so it cannot migrate.

If a platform is going into an upper floor of a concrete-frame building, ask a structural engineer rather than the equipment supplier. That is a question about the building, and we will say so.

Rubber tiles should be laid at room temperature and allowed to settle before heavy equipment is placed on them. Tiles installed cold and loaded immediately can retain a set in the shape of the machine feet. On a winter installation, leave the tiles in the room for 24 hours before laying them.