Condo Living

August 4, 2026 Published by Toronto and Area Chapter - By Steve Vasconcelos

Designing Condominium Gyms with Noise and Vibration in Mind

From the Summer 2026 issue of CCI Toronto Condovoice Magazine.

Condominium gyms are valuable amenities, but when located above, below, or beside residential suites, they can also create difficult noise and vibration complaints.

The first step is understanding what type of disturbance is occurring.

Complaints involving music, voices, televisions, or group fitness instruction generally involve airborne sound. In those situations, walls, ceilings, doors, and room finishes may form part of the solution.

Dropped dumbbells, kettlebells, weight stacks, and repeated heavy impacts create a different problem. These events introduce mechanical energy directly into the floor slab. That energy can travel through concrete slabs, columns, walls, and structural connections before being experienced elsewhere as a thud, boom, pulse, or physical vibration.

This is structure-borne vibration, and it cannot always be corrected by insulating the ceiling below.

“Condominium corporations often begin with the understandable assumption that the problem is the ceiling, or that any rubber gym floor should be sufficient,” says Steven Vasconcelos of Acoustic Floor Solutions, a flooring and acoustics specialist with 30 years of experience working with acoustic engineers, testing laboratories, facility designers, builders, resorts, sports facilities, and multi-residential properties. “The better starting point is to identify the source, the transmission path, and the type of impact before selecting a remedy.”

Why Traditional Ratings May Not Tell the Full Story

Two commonly referenced acoustic ratings are Sound Transmission Class, or STC, and Impact Insulation Class, or IIC.

STC describes how effectively a building assembly reduces airborne sound transmission. IIC evaluates impact sound transmission through a floor-ceiling assembly using a standardized tapping machine.

Both ratings have important applications in residential construction and code-related acoustic evaluation. However, they do not recreate the same impact as a 30-, 50-, or 80- pound weight being dropped onto a gym floor.

A tapping machine is intended to create standardized impacts similar to footfall. A dropped weight produces a different force, frequency range, and structural response.

For that reason, condominium boards should be cautious about relying on IIC or STC values alone when selecting flooring for a weighttraining area. The more relevant question is how much impact energy the floor assembly prevents from entering the building structure under realistic gym conditions.

Rubber Flooring Is Not Automatically an Acoustic System

A conventional rubber floor may provide durability, traction, comfort, and slab protection. Those are important functions, but they do not prove that the floor will control structure-borne vibration.

Performance depends on the complete assembly, including material density, thickness, stiffness, deflection, damping, installation method, subfloor condition, equipment layout, impact zones, and the location of nearby suites.

The building itself also matters. A floor that performs well in a slab-on-grade fitness facility may behave differently in a high-rise where the gym shares structural elements with occupied residential units.

Product thickness, recycled content, appearance, and general claims of shock absorption should not replace independent acoustic and vibration testing.

Testing the Actual Risk

Gym flooring intended for multi-residential buildings should be tested under conditions that reflect its actual use.

This means using controlled heavy-weight drops inside real buildings, with measurements performed by qualified acoustic engineers. Testing may include repeated dumbbell or kettlebell drops, sound measurements in nearby suites, direct vibration measurements, comparison with the existing floor, and evaluation against other proposed assemblies.

Highly sensitive accelerometers are often used during this process. An accelerometer is a small instrument attached directly to a slab or structural surface to measure how quickly and intensely that surface moves when an impact occurs.

A sound-level meter measures sound pressure in the air. An accelerometer measures physical vibration travelling through the structure.

That distinction matters because a dropped dumbbell may not sound unusually loud to the person standing inside the gym, while still transmitting disruptive vibration into a suite above, below, or beside the space.

Testing can also include one-third octave band analysis, which separates vibration or sound into specific frequency ranges. This provides a clearer understanding of where the structure is responding most strongly and whether the proposed flooring is reducing the frequencies associated with the complaint.

Independent Reports Create a Defensible Record

Independent testing provides condominium corporations with more than a product claim.

It can provide documented test conditions, measured data, comparative results, and written conclusions from qualified acoustic professionals.

Where separate acoustic engineering firms test flooring systems in different buildings and reach consistent conclusions, boards gain greater confidence that the selected assembly is performing as intended. In comparative assessments involving Acousti Armour gym flooring, separate acoustic engineers working in different buildings concluded that it achieved the strongest measured performance among the systems evaluated under the specific test conditions.

The significance is not simply that one product performed better than another. The more important point is that the conclusion came from independent professionals, real buildings, controlled heavy-weight impacts, and measurable data.

That documentation can become valuable if a complaint later arises.

No report can prevent a resident from raising a concern, and no flooring manufacturer should promise complete soundproofing. Every building, floor slab, equipment layout, user group, and receiving suite is different.

The objective is not absolute silence.

The objective is to reduce impact energy, manage foreseeable risk, and create a documented basis for the decisions made by the corporation. 

A board is in a stronger position when it can demonstrate that qualified professionals were involved, realistic heavy-impact testing was reviewed, the proposed assembly was selected based on measured performance, and reasonable mitigation measures were implemented.

Independent reports do not guarantee that a corporation will never receive a complaint. They do, however, provide tangible evidence that the decision was reasonable, technically informed, and based on more than assumptions or marketing literature.

Flooring Is Only Part of the Strategy

Flooring should not be viewed as the only control measure.

Deadlifts, Olympic lifting, uncontrolled weight dropping, and movement of heavy equipment may require dedicated lifting platforms, equipment isolation, revised layouts, signage, staff supervision, or restrictions on certain activities.

An acoustic engineer can help determine whether the issue involves airborne sound, structure borne vibration, flanking transmission, equipment, building structure, or a combination of factors.

A defensible response to a complaint is not, “We already have rubber flooring.”

A stronger response is that the source was investigated, qualified professionals were consulted, realistic testing was reviewed, affected residents were considered, and the selected measures were supported by data.

Better Questions Lead to Better Decisions

Before approving a condominium gym floor, boards and managers should ask whether the assembly has been tested under realistic heavy-impact conditions, whether the testing was completed by independent acoustic professionals, whether vibration was measured directly, and whether the results came from real buildings.

They should also ask how the finished floor height affects accessibility, whether additional layers are necessary, whether lifting zones are located near sensitive suites, and whether operational controls are also required.

The most useful question is not simply, “How thick is the rubber?” or, “What is the IIC rating?” It is this:

How much impact energy are we preventing from entering the building structure in the first place?

---

Steve Vasconcelos, Founder Acousti Armour™ Gym Flooring & Acoustic, Underlayment and RHINO Sound Control