Every time a weight hits the gym floor, that impact doesn’t stay on the floor. It travels through the concrete slab, into the walls, along the structure and comes out as noise and vibration in the apartments below. At 80+ decibels, it’s not a minor annoyance. It’s the sound of a busy road, directly above someone’s bedroom.
This is exactly what residents at a building in Mira Road, Bhayandar, Mumbai were experiencing every day. The gym on the 6th floor had no acoustic treatment. Gym users dropped weights on bare concrete. The entire slab vibrated. And the apartments on the 5th floor measured over 80 dB of impact noise well above any acceptable residential limit.
SILARIS installed a spring floating floor in the gym. Measured noise levels dropped to 50 dB. The gym kept operating. The complaints stopped. Here’s why the same solution is relevant to every gym inside a residential building.
| 80+ dB measured before installation — comparable to roadside traffic | 50 dB after SILARIS spring floor — within residential comfort limits | 30 dB reduction — perceived as an 8× drop in noise intensity |
The real problem isn’t sound. It’s vibration.
Most people assume noise is an airborne problem something you solve by sealing gaps or adding insulation to walls and ceilings. Impact noise from a gym is different. When a heavy weight hits the floor, it sends a force impulse directly into the structural slab. That impulse travels as vibration through solid concrete which conducts it far more efficiently than air.
The ceiling of the apartment below becomes a vibrating panel, radiating the energy back as audible noise inside the room. You can treat the ceiling all you want the noise is being generated by the structure itself. The only effective fix is to stop the vibration from entering the slab in the first place.
Why rubber gym mats aren’t enough: Standard rubber mats reduce surface abrasion and protect the floor finish. They have minimal effect on structure-borne impact transmission. In the Mira Road project, rubber mats were already in use before SILARIS was called in and noise levels were still above 80 dB.
How a floating spring floor solves it
A floating spring floor mechanically decouples the gym floor surface from the building structure. The deck and everything on it sits on spring isolators. When a weight is dropped, the springs absorb the impulse. The slab below receives a fraction of the original force. No vibration in the structure means no noise in the apartment below.
The SILARIS system used at Mira Road, Bhayandar is built up in four layers:
| 1 Steel spring mounts 7 mm wire diameter — primary impact isolation laye | 2 HDHMR board (double layer) 18 mm per layer (36 mm total) — rigid floating deck over springs | 3 Rockwool infill 100 mm thick — fills spring cavity, damps residual resonance | 4 Rubber surface sheet 25 mm thick — final impact absorption and training surface |
The perimeter of the floor is isolated from all walls and columns using acoustic strips, closing off flanking paths the routes vibration takes around the edges of the floating slab and back into the structure.
The Mira Road result
Verified Project
6th Floor Gymnasium — Residential Building, Mira Road, Bhayandar, Mumbai
Noise measured inside 5th floor apartments during gym activity, before and after SILARIS spring floor installation:
Before — 80+ dBMax scale: 100 dB
After — 50 dB
| Before 80+ dB — non-compliant | After 50 dB — NBC / IS 1950 compliant |
Who needs this, and when
Floating spring floors are relevant any time there is a gym — or any high-impact training activity — in a building with occupied floors above or below. The situations that most commonly require it:
Residential gym on any floor except groundGym above apartments or officesFreeweight training areasCrossFit and functional training spacesGround floor gyms above a basement car parkMixed-use buildings with gym and residential unitsGymnastics academies in multi-floor buildings
The earlier the floor is planned in the project, the easier and less expensive the installation. Retrofitting — as in the Mira Road case — is entirely possible, but it requires clearing and rebuilding the gym floor, which takes more time and coordination. For new builds and fit-outs, specifying a floating floor from the start is straightforward.
What you get beyond noise reduction
A floating spring floor is not just an acoustic solution. For gyms, the spring system also provides energy return — the floor gives slightly under foot and rebounds, reducing fatigue and joint stress during training. This is the same principle used in professional athletic training floors and competition gymnastics floors. Gym members train on a surface that performs better, not just one that makes less noise.
For the building, the floor brings the structure into compliance with the National Building Code of India and IS 1950 impact noise standards — which is increasingly relevant as more residential buildings add gyms and as residents become more aware of their rights to acoustic comfort.
In the Mira Road project: Post-installation, residents on the 5th floor reported that weight drops from the gym above were no longer audible or felt. The gym continued to operate without any restrictions on training or equipment use. Both parties were satisfied with the outcome.
The bottom line
If your building has a gym above a residential floor, the question isn’t whether impact noise is a problem — it’s when residents will start complaining about it. A floating spring floor is the only solution that addresses the root cause: vibration entering the building structure.
The Mira Road installation achieved a 30 dB reduction — from 80+ dB to 50 dB — with the gym operating at full capacity throughout. The system comprises four layers: steel spring mounts, double-layer HDHMR board, Rockwool infill, and a 25 mm rubber surface. No structural modification to the building was required.
Talk to SILARIS about your projectSite assessment, system specification, and installation across India.