The client and the problem
Marek had trained at a commercial gym for years — a 20-minute drive each way, crowds at peak times, never a free squat rack on a Monday evening. When he bought a detached house in Nadarzyn (a town just outside Warsaw), he immediately decided that the 40 m² basement wouldn’t become a bicycle storage room. It was going to be his private training facility.
The space came with every classic basement challenge: lower ground level, a ceiling height of just 2.35 m, no acoustic insulation, and an original concrete floor with over 30 years of history — uneven across its length and with moisture concerns.
If you have a similar basement in the UK — low ceiling, old slab, humidity — this build will look very familiar.
Preparation works first, equipment second
We didn’t open a catalogue on the first visit. We sent in a building team.
Acoustic insulation — three external walls were lined with 100 mm mineral wool in a steel frame and finished with plasterboard. The house is detached, but sound carrying to the living areas above was a real concern for the rest of the family. Post-installation measurements showed a reduction of over 18 dB.
Levelling screed — the original floor had a 4 cm level difference over the length of the room. We applied a self-levelling compound to create a perfectly flat base for the rubber matting.
20 mm rubber matting — rolled SBR granulate mat (not interlocking tiles) covering the full 40 m². It protects the screed, absorbs vibration, and deadens the impact of dropped weights.
Zoned LED lighting — the room had a single light point by the door. We designed three zones: free weights area (cool 5000K, 500 lux), cardio corner (neutral 4000K), and stretching area (warm 3000K). Controlled by a touch panel at the door.
Split air conditioning — 2.5 kW unit with heating function. Basements don’t overheat quickly, but after a hard session the temperature can creep towards 25°C. The unit handles both directions: heating in winter, cooling in summer.
Mechanical extract ventilation — a fan with timer and humidity sensor. Basement moisture is one of the most persistent problems in home gym conversions — this solved it permanently.
Equipment
With the space properly prepared, the equipment fit was straightforward. Marek’s priorities were clear: compound strength work as the foundation, some cardio, and the ability to train from his own programming — not machine-dependent circuits.
➜ Body-Solid Pro Power Rack — freestanding cage with adjustable safety bars, pull-up bar, and cable attachment point. Occupies under 1.5 m² of floor space but delivers the capability of a commercial facility ➜ 20 kg Olympic barbell — with a full plate set: 5 × 25 kg, 4 × 20 kg, 4 × 15 kg, 4 × 10 kg, 4 × 5 kg, 4 × 2.5 kg. 310 kg total on a steel plate tree ➜ Dumbbells 2–50 kg — rubber hex set, 2 kg increments to 30 kg, then 5 kg increments to 50 kg. Tiered rack on wheels for easy cleaning ➜ FID adjustable bench — 7 positions flat to decline, with leg support. Works equally well for barbell work inside the rack and dumbbell exercises ➜ Spinning bike — 22 kg flywheel, adjustable resistance, three handlebar positions. Set in the corner by the wall, out of the lifting zone ➜ 3 m × 2 m wall mirror — adjacent to the free weights station. Essential for technique monitoring when training alone
Timeline
From signed contract to first training session: 5 weeks. Building works took three weeks; equipment delivery and installation another two.
What the client says
“For three years that basement collected dust and old bicycle tyres. Now I train there every day — I walk out of the bedroom and forty-five seconds later I’m at the rack. The soundproofing is so effective that my wife sleeps upstairs while I’m doing heavy squats. Best investment I’ve made in this house.”
Related case studies
➜ Garage Gym in Warsaw Bielany — 18 m² garage conversion with a compact approach to low ceilings
Useful resources
➜ Custom Home Gyms — bespoke fit-outs for basements, spare rooms and outbuildings ➜ How Much Does a Home Gym Cost? — full cost guide covering equipment, fit-out and preparation works