In the competitive world of flooring installation, a dangerous trifecta of ignorance is setting homeowners up for failure. Too often, flooring installers and contractors, eager to close a deal, will confidently recommend and install cheap, 1-3mm foam or synthetic cloth underlayment’s in condominium projects. They assure the client they know what they are doing, but this confidence is frequently misplaced. The reality is that many are dangerously unaware of three critical factors:
The condominium corporation’s governing documents, the building code’s requirements and recommendations for sound transmission, and the fundamental science of how sound is tested. These three unknowns are not just a minor oversight, they are a recipe for disaster and a true compass pointing to a troubling decline in professional standards.
It is not enough to simply install a floor that looks good at a low price. A flooring installation that violates a condominium’s rules is a failure from the start. Installers who grab a generic, low-cost underlayment off the shelf are bypassing a crucial due diligence step. Every condominium corporation has its own unique set of bylaws and rules that dictate the acoustic performance required of a flooring assembly. These legal documents often specify a minimum Impact Insulation Class (IIC) or Field Impact Insulation Class (FIIC) rating that exceeds basic recommendations. A contractor who doesn't ask for and review these documents is navigating blind, exposing the homeowner to future costly disputes with neighbours, management and the very real possibility of being forced by the condo board to tear out a brand-new floor at their own expense.
Furthermore, a startling number of installers operate with a flimsy understanding of building code requirements, recommendations and the science of sound. While the National Building Code of Canada (NBCC) specifies a minimum Sound Transmission Class (STC) of 50 to control airborne noise like voices or music, the more critical rating for flooring—the IIC rating for impact noise like footsteps—is often a recommendation (IIC 55) rather than a strict mandate in the base code. This is where condo bylaws become paramount. The most perilous misconception, however, is the belief that an underlayment itself possesses an IIC rating. It does not. An acoustic underlayment is merely one component of a larger system. The IIC rating is a measure of the entire floor-ceiling assembly working together—from the concrete slab below to the finished flooring on top.
This misunderstanding is where the deception, intentional or not, truly lies. A contractor might show a customer the underlayment’s packaging, which boasts a high IIC rating of 72 or more. What they fail to mention is that this number was likely achieved in a laboratory setting, tested as part of an ideal assembly that often includes a suspended (or "dropped") ceiling with additional insulation—a feature almost never present in standard high-rise condominium construction. Once installed over a bare concrete slab, the real-world performance of that underlayment plummets, often IIC 47-52, below the building code recommendation of IIC 55, leaving the homeowner with a non-compliant floor and the illusion of protection.
A true flooring professional understands that their responsibility extends beyond the physical installation. It involves protecting the customer's investment and ensuring their peace of mind for years to come. This means taking the time to educate the client, asking the right questions about their building, and insisting on using materials that are certified to meet the specific requirements of the space. Guiding a customer toward a slightly more expensive, but fully compliant, acoustic underlayment isn't upselling, it's professional integrity.
The consequences of getting this wrong can be devastating, as illustrated by the experience of a recent Toronto condo owner:
"My contractor said the foam underlay he used was 'top of the line' for sound. A month after he finished the job, I received a formal complaint from my downstairs neighbour and a notice from my condo board. It turns out the underlay was completely inadequate and violated our building's bylaws, which required a minimum FIIC (Field Impact Insulation Class) of 65. The product he used didn't come close. I now must pay to have the entire floor removed and replaced correctly. The 'deal' my contractor gave me has cost me double."
As a flooring installer or contractor, your reputation is built on trust and performance, not just price. The goal should never be to simply sell the cheapest installation. The job is to match the right, compliant products to the right space, protecting your client from the financial and emotional fallout of a failed installation. Because in the end, a floor that fails to meet acoustic and legal standards, no matter the price, is always the wrong floor.
The Floor Studio | Acoustic Floor Solutions, specializes in high-performance recycled rubber acoustic products designed to meet and exceed the National Building Code of Canada and International Building Code. Contact us today to discuss your project and find the right solution for achieving superior sound insulation and resident satisfaction.
Why RHINO Sound Control is the Right Choice for Your Condo Project?
Sound transmission is an essential aspect of condo living, where shared walls and floors can lead to frequent noise disturbances. RHINO Sound Control underlayment offers proven performance in reducing noise transmission, backed by independent testing, peer reviews and industry recognition. Its durability, moisture resistance, and sustainable eco-friendly composition make it the ideal choice for condo owners looking to enhance the comfort and peace of their living spaces.
The Ontario Building Code (OBC) sets a recommended standard for acoustic separation in multi-family dwellings, with a target of Impact Insulation Class (IIC) 55 for floor-ceiling assemblies to ensure resident comfort. This is not a requirement, but instead only a recommendation.
As detailed below by HGC Noise Vibration Acoustics, RHINO’s results confirm that it does not simply meet but exceeds the acoustic recommendation of the OBC, when tested over an 8" concrete slab with NO suspended ceiling.
“Review of Intertek Test Report
HGC Noise Vibration Acoustics (HGC) reviewed the Intertek “Acoustical Performance Test Report”
"The IIC performance of this test specimen meets and exceeds minimum IIC-55 criteria in the National Building Code (NBC) of Canada, and the Ontario Building Code (OBC). "
While our product is proven to be effective at mitigating noise from normal residential use, no sound insulation product can be expected to completely absorb the excessive impact noises (thumping, dropping items, dragging furniture) often associated with residents who are not mindful of their neighbours. This is a matter of building governance and enforcement of rules regarding quiet enjoyment.