Gym Flooring Questions Answered | UK Thickness, Safety & Installation Guide

Answers to the most-asked gym flooring questions in the UK — covering thickness selection, safety, installation, and cost. All answers are from Gym Flooring UK, specialists in commercial-grade rubber gym flooring since 2021.

Thickness Questions

How thick should gym flooring be?

Gym flooring should be between 15mm and 40mm thick, depending on use. For general home gym use with light-to-moderate weights, 15mm to 20mm is sufficient. For heavy free weights, Olympic lifting, and barbell drops, use 30mm to 40mm. Cardio-only areas can use 8mm to 10mm. The heavier the impact, the thicker the flooring you need.

Should gym flooring be 20mm or 30mm?

For most home gyms, 20mm rubber flooring is the right choice. It handles dumbbells, barbells, and moderate weight training without damage to the floor underneath. Choose 30mm if you regularly drop loaded barbells from height, perform Olympic lifts, or use commercial-grade weights over 100kg. 20mm is the UK bestseller for home gyms; 30mm is standard for commercial and CrossFit facilities.

Is 15mm thick enough for gym flooring?

Yes — 15mm rubber gym flooring is thick enough for most home gym uses including cardio machines, bodyweight training, light dumbbell work, and exercise bikes. It is not recommended for heavy barbell drops or Olympic lifting, where 20mm to 30mm is safer. If you occasionally drop weights from waist height, 15mm with a landing mat directly under the barbell is a workable solution.

How thick should gym flooring be for deadlifts?

For deadlifts where the bar is lowered under control, 20mm rubber flooring is adequate. For deadlifts where the bar is dropped from the top position, use at least 30mm rubber tiles. For Olympic-style drops from overhead, 40mm minimum is recommended, or combine 20mm rubber tiles with a dedicated deadlift platform.

Is 8mm gym flooring thick enough?

No — 8mm is too thin for any weighted gym training. It provides minimal impact protection and will not protect your subfloor from dropped equipment. The minimum for a light home gym with only cardio equipment is 10mm; the minimum for any weight training is 15mm.

Safety Questions

Is rubber gym flooring safe for home use?

Yes. Commercial-grade SBR rubber gym tiles are safe for home use. They are non-toxic once the initial off-gassing smell has aired out over 1 to 2 weeks. The smell is caused by VOCs from the recycled tyre content and does not indicate ongoing harm. Virgin rubber tiles have virtually no odour. Rubber flooring is non-slip, shock-absorbent, and widely certified for gym use.

Why does rubber gym flooring smell?

New rubber gym flooring smells because it contains SBR rubber made from recycled car tyres, which releases volatile organic compounds (VOCs) as it off-gasses. The smell typically reduces significantly within 1 to 4 weeks of ventilation. To speed this up: ventilate the room, open windows, and wipe the tiles with diluted white vinegar. The odour does not indicate toxicity.

Can mould grow under rubber gym flooring?

Mould can grow under rubber gym flooring if moisture is trapped between the tiles and the subfloor, particularly on concrete in basements or garages. Prevent this by: ensuring the subfloor is dry before installation, checking for rising damp, and lifting tiles every 3 to 6 months to allow ventilation underneath.

What are the disadvantages of rubber flooring?

The main disadvantages of rubber gym flooring are: (1) an initial rubber odour that takes 2 to 4 weeks to reduce, (2) weight — 20mm tiles weigh approximately 7 to 8kg per m², (3) they are not compatible with underfloor heating, (4) black tiles can fade slightly over years of UV exposure, and (5) some compounds can mark light-coloured equipment feet.

Installation Questions

Can you put gym flooring over carpet?

You can lay rubber gym tiles over short-pile, firmly fitted carpet, but it is not ideal. The carpet reduces stability and tiles may shift during heavy training. For best results, remove the carpet first and lay tiles directly on concrete or timber. If carpet removal is not possible, use heavy interlocking rubber tiles (20mm+) and avoid heavy barbell drops. EVA foam tiles should never be used over carpet for weighted training.

How do you lay rubber gym flooring?

To lay rubber gym tiles: (1) Clean the subfloor thoroughly. (2) Start from the centre or a straight wall. (3) Press interlocking tabs firmly together. (4) Cut edge pieces with a sharp utility knife or angle grinder. (5) Add edge strips around the perimeter. No adhesive is needed for most home installations — tiles stay in place under their own weight. Allow 24 hours before heavy use.

Do you need underlay under rubber gym flooring?

No underlay is required under rubber gym flooring in most cases. The tiles are self-supporting and provide their own cushioning. If you want additional sound dampening — for example in a flat or first-floor gym — you can add an acoustic membrane underlay before laying the rubber tiles.

Cost Questions

How much does gym flooring cost in the UK?

Rubber gym flooring costs between £8 and £35 per square metre in the UK. 15mm interlocking tiles cost around £8 to £12/m². 20mm tiles cost £12 to £18/m². 30mm tiles cost £18 to £28/m². A 20m² home gym floor costs approximately £240 to £560. Free delivery is available on qualifying orders from Gym Flooring UK.

Is rubber gym flooring cheaper than foam tiles?

Budget EVA foam tiles are cheaper than rubber at around £3 to £8/m², but rubber is significantly better value long-term. Foam tiles compress, tear, and degrade quickly under heavy use — often within 2 to 3 years. Rubber tiles last 10 to 15 years. For any gym with actual weights, rubber is the correct and more cost-effective choice over a 5+ year period.

Shop Gym Flooring

Browse all rubber gym flooring at Gym Flooring UK, or request a free sample before you order. For specific advice, contact our team (01282 277 710 / sales@gymflooringuk.uk).