Gym flooring: one surface for the whole facility does not work

The cardio area, the free-weights area and the studio for group classes place mutually exclusive demands on the floor. A surface that is perfect under a treadmill will be destroyed by a dropped barbell. Let us go zone by zone.

Free-weights area: impact

What happens: a 30 kg dumbbell falls from a metre and a half. The impact energy goes into the floor. A 100 kg barbell dropped from chest height is another order of magnitude altogether.

Requirements: here vinyl flooring on its own is not the answer. You need a multi-layer build-up: rubber tiles or mats 20–40 mm thick over a stable substrate. Vinyl flooring is used in this zone as a base under the rubber, or in the walkways between racks.

In practice: the deadlift area is separated by a platform. The rubber under the weights is laid over a glue-down PVC floor, which provides a flat, waterproof and washable base.

Cardio area: point loads and vibration

What happens: a treadmill weighs 150–200 kg and stands on four supports with a small footprint. On top of that comes constant vibration in use. Cross-trainers and exercise bikes are the same story.

Requirements: the key parameter is residual indentation to EN 433. The floor must recover once the load is removed rather than keep the dents. For commercial sheet vinyl this figure is 0.33 mm — a machine can be moved and no mark is left behind.

The second parameter is dimensional stability: 0.4%. Neither vibration nor local heating should cause the covering to shift.

In practice: class 34, glue-down installation (a floating build-up under vibration is unacceptable), load-spreading pads under the machine feet. Vibration isolation from the structural slab is handled by a separate anti-vibration mat if the gym is not on the ground floor.

Group class studios: a combination of requirements

What happens: jumping, lunges, work barefoot and in trainers, sweat, mats, small equipment. Plus intensive cleaning after every class.

Requirements:

• shock absorption, to protect joints under jumping loads;
• slip resistance R10 — the floor gets wet with sweat and users work in trainers or barefoot;
• hygiene — sweat reaches the surface constantly, and the finish must withstand daily disinfection;
• welded seams, otherwise moisture gets under the covering.

In practice: sheet vinyl of class 33–34 with welded seams, on a resilient backing where required. For yoga and Pilates, a softer-surfaced covering or zoning with mats.

Functional training and CrossFit areas

The most aggressive environment there is: ropes, slam balls, sleds, kettlebells on concrete. Here vinyl flooring is used only as a base under rubber — direct use is not designed for such loads.

Changing rooms, showers, walkways

They often fall out of the specification, yet in accident terms these are the most dangerous zones of all.

• Changing rooms: R10, waterproofing, welded seams, coved skirting.
• Walkways from the showers: R11 is mandatory — wet feet on a smooth floor give the highest fall risk in the whole club.
• Corridors and stairs: class 34, R10, anti-slip nosing on the steps.

Slip classes in detail, and where each one is mandatory, are covered in a separate article.

Acoustics: the main source of disputes with neighbours

A gym on the first floor of a residential building means guaranteed complaints if acoustics were not designed in from the start.

Two different phenomena:

Impact noise — jumping, dropped weights, footfall on the treadmill. It travels through the building structure. The only fix is elastic isolation: an anti-vibration underlay beneath the covering and, in impact zones, a floating screed on vibration mounts.

Airborne noise — music, voices, equipment in use. It is dealt with through wall and ceiling finishes and has almost nothing to do with the floor.

A practical benchmark: a thin covering bonded directly to the slab does not reduce impact noise at all. A stated reduction of 15–18 dB comes from the whole build-up, not from the wear layer. This has to be designed in, not retrofitted after the first complaint.

Cleaning: sweat is an aggressive medium

Sweat contains salts, acids and organic matter. Daily cleaning is essential; otherwise the floor loses its appearance within a single season.

Daily: damp cleaning with a pH-neutral product, disinfection of contact areas.

What not to use: abrasives, solvents, strongly acidic and strongly alkaline products. A steam cleaner only with the manufacturer's approval.

A separate issue — rubber. Dark rubber from mats, footwear and equipment in prolonged contact with PVC causes plasticiser migration: permanent dark stains are left on the floor. The answer is light-coloured or unpigmented rubber wherever contact is permanent.

Every 6–12 months: renewal of the polymer protective layer in circulation areas.

Zone summary table

What to order

The backbone of the project is commercial sheet vinyl of class 32–33 with Bfl-s1, 2 m wide, with welded seams. For reception and lounge areas, where a warmer interior is wanted, use glue-down LVT planks.

A calculation based on your own plan, broken down by zone, is available through the quotation request form. Attach the floor plan showing the zones and the storey: the acoustic part of the solution depends on it.

FAQ

Can vinyl be laid under the free-weights area? Only as a base under rubber tiles. Direct use beneath falling weights is not intended.

Will the floor take treadmills? Yes, in class 34 and glue-down installation. Check residual indentation to EN 433 and use load-spreading pads under the feet.

How do we solve the noise problem for the neighbours below? Structurally only: an anti-vibration underlay and, in impact zones, a floating screed on vibration mounts. The floor finish alone does not reduce impact noise.

What slip class is needed in the changing room? R10 in the changing room itself and R11 in the walkway from the showers.

Why have dark stains appeared under the mats? That is plasticiser migration from dark rubber into the PVC. The stains cannot be removed. Use light-coloured rubber wherever contact is permanent.