What's the price to upgrade all my floor registers to acoustic boot registers in a two-storey home?

Upgrading all floor registers to acoustic boot registers in a two-storey Ottawa home typically costs between $1,500 and $4,000, depending on the number of registers and whether the existing ductwork needs modification. Most two-storey homes in Ottawa — across Kanata, Barrhaven, Stittsville, Orleans, and the urban core — have between 12 and 20 floor registers, and each acoustic boot replacement runs $100 to $200 installed, including the boot, register grille, and any duct adapting needed.Standard floor registers are one of the most overlooked sound transmission paths in a home. The sheet metal duct boot connects directly to the floor joist cavity, creating an open channel between floors that carries conversation, television audio, footsteps, and even plumbing noise from one storey to the other. An acoustic register boot (sometimes called a sound boot or insulated register box) replaces the standard metal boot with a lined, sealed enclosure that breaks this direct sound path. The inside of the boot is lined with acoustic duct liner or mineral wool, and the boot itself is sealed to the subfloor to prevent flanking.What the Upgrade InvolvesThe installation process requires accessing the ductwork from below — either from a basement for first-floor registers or from the space between floors for second-storey registers. For first-floor registers in homes with unfinished basements, the work is straightforward and most of the cost is in materials and moderate labour. Second-floor registers are more challenging because the technician must work from inside the floor cavity, which may require removing some first-floor ceiling drywall to access the boots. If ceiling removal is needed, factor in an additional $500 to $1,500 for drywall repair and painting.The material cost per acoustic boot runs $40 to $80 for the boot itself, with premium products featuring thicker insulation lining and heavier-gauge construction at the higher end. Add $15 to $30 for a quality register grille with a rubber gasket seal — the gasket prevents the grille from rattling and creates an airtight fit. Labour per register is typically $50 to $100, with the total job benefiting from economies of scale when doing all registers at once rather than one at a time.For the best results, combine the acoustic boot upgrade with duct liner on the first 4 to 6 feet of each branch duct run. Sound travels through ductwork like a speaking tube — your HVAC system connects every room in the house through a network of metal channels. Lining the ducts near each register with 1-inch acoustic duct liner absorbs sound energy as it travels through the system, adding another $5 to $10 per linear foot but significantly improving room-to-room privacy. This is especially effective in Ottawa homes where the furnace fan runs frequently during our long heating season from October through April.One important note: never restrict airflow to the point where your HVAC system is strained. A qualified installer will size the acoustic boots to maintain adequate airflow while adding sound absorption — undersized boots can reduce heating efficiency and cause the system to work harder, which ironically creates more noise from increased fan speed and air turbulence. Also ensure that any boot modifications maintain the fire rating of the floor-ceiling assembly, as required by the Ontario Building Code.This is a project where a professional HVAC or soundproofing contractor can make a significant difference in the result. Sound IQ from Ottawa Soundproofing can help you understand the noise paths in your specific home, and the Ottawa Contractor Directory at justynrookcontracting.com/directory lists HVAC and acoustic professionals who can assess your ductwork and provide an accurate quote for the full upgrade.Looking for experienced contractors? The Ottawa Construction Network connects homeowners with qualified professionals:Luxe Painting and Renovations JC CarpentryScott Smirle (Smirle Elite Contracting)The Granite shopRenovo ConstructionView all contractors →