How much does it cost to add a resilient underlayment under engineered hardwood on a second floor?

Adding a resilient underlayment beneath engineered hardwood on a second floor typically costs between $3.50 and $7.00 per square foot installed in Ottawa, depending on the underlayment type and whether you are including it as part of a new flooring installation or retrofitting beneath existing floors. For a typical 300-square-foot second-floor bedroom, expect to budget $1,050 to $2,100 for the underlayment portion alone, which is roughly 10 to 15 percent below what the same work would cost in the GTA.
Choosing the Right Underlayment for Impact and Airborne Noise
The underlayment you select makes a dramatic difference in performance. A basic foam underlayment ($0.50 to $1.50 per square foot material cost) offers modest impact noise reduction, typically improving your IIC rating by 5 to 10 points. Stepping up to a rubber or cork underlayment ($1.50 to $3.50 per square foot) delivers significantly better results, often adding 15 to 22 IIC points. For the best performance under engineered hardwood, products like Pliteq GenieMat RST or Acoustik underlayment ($2.50 to $4.00 per square foot) are purpose-built for impact isolation and can push floor-ceiling assemblies well above the Ontario Building Code minimum of IIC 50 between dwelling units.
What many Ottawa homeowners overlook is that underlayment alone addresses primarily impact noise — footsteps, dropped objects, and chair legs scraping. If you are also dealing with airborne noise like voices and music transmitting through the floor, you will need to address the full ceiling assembly below, which typically means adding acoustic mineral wool insulation in the joist cavities and possibly resilient channels or isolation clips on the ceiling drywall. That more comprehensive approach runs $12 to $20 per square foot when combined with the underlayment above.
Installation during Ottawa's colder months requires some planning. If you are working in an unheated space or a room where temperatures have dropped below 10°C, adhesive-backed underlayments may not bond properly, and engineered hardwood needs to acclimate to room temperature for at least 48 hours before installation. Professional installers in Ottawa know to account for this, but it is worth confirming scheduling during the November-to-March window.
When getting quotes, make sure contractors specify the exact underlayment product, its IIC and Delta IIC rating, and whether the quote includes proper edge sealing with acoustic caulk at the perimeter. A poorly sealed underlayment that gaps at the walls will allow impact vibration to flank around the edges, reducing your investment's effectiveness considerably. Budget an extra 10 to 15 percent contingency for any subfloor levelling that may be needed once the existing flooring is removed. For a project like this, Sound IQ at Ottawa Soundproofing can help you understand which underlayment products deliver the best value for your specific floor assembly and noise concerns.Looking for experienced contractors? The Ottawa Construction Network connects homeowners with qualified professionals:Reno's by Daniel FrauwallnerJC CarpentrySomar Contracting Inc.CallandgoneBFI RenovationsView all contractors →