What's the best soundproofing strategy for a home that backs onto the Queensway with constant diesel truck noise?

Living beside the Queensway (Highway 417) means you are dealing with one of the most demanding noise environments in Ottawa — a 24-hour stream of diesel trucks, high-speed traffic, and heavy vehicles generating sustained low-frequency noise in the 63 to 250 Hz range. This type of noise is especially difficult to block because low frequencies pass through standard building materials much more easily than mid-range or high-frequency sounds. A successful strategy requires treating your home as a complete envelope, not just upgrading a single wall or window.
A Whole-Envelope Approach
Start with the highway-facing wall, which takes the brunt of the noise. A standard 2x4 framed wall with fibreglass insulation and single-layer drywall achieves roughly STC 33 to 36 — completely inadequate for highway proximity. The target for homes backing onto the Queensway should be STC 55 to 60 on the exposed wall. The recommended assembly is: acoustic mineral wool (Roxul Safe'n'Sound) in the stud cavities, sound isolation clips (RSIC-1) with hat channel on the interior face of the studs, and two layers of 5/8-inch Type X drywall with Green Glue compound between them, all perimeter-sealed with acoustic caulk. For maximum performance against the Queensway's low-frequency content, add a layer of mass loaded vinyl (MLV) behind the isolation clips for additional mass. This assembly typically runs $18–$28 per square foot installed in Ottawa.
Windows on the highway side are typically your weakest link. Even good double-pane windows achieve only STC 28 to 32 — far less than the upgraded wall around them. For Queensway exposure, consider triple-pane windows with laminated glass on at least the highway-facing elevation, which can achieve STC 38 to 42. If full window replacement is not in the budget, interior storm windows (secondary glazing) from companies like Indow or Magnetite add an additional air gap and can push combined window performance to STC 35 to 40 for $300–$600 per window. The key is asymmetric air gaps — the space between the primary window and the storm panel should be at least two inches, and ideally four inches, to maximize low-frequency performance.
The roof and attic are often overlooked but critical for Queensway homes. Highway noise arrives at an angle, and for homes in neighbourhoods like Carlington, Westboro, Hintonburg, and Civic Hospital area that sit close to grade level with the highway, a significant portion of noise enters through the roof. Ensure your attic has at least R-60 blown-in insulation (which Ottawa building standards already recommend for thermal performance), and seal any attic penetrations — bathroom fans, plumbing vents, and electrical boxes — with acoustic caulk. If you have soffit vents facing the highway, consider acoustic baffles that allow airflow while attenuating noise.
Address every penetration and flanking path in the highway-facing envelope. Dryer vents, bathroom exhaust outlets, hose bibs, and gas line penetrations all need to be sealed with expanding foam and acoustic caulk. Replace any exterior doors on the highway side with solid-core, weatherstripped units with adjustable thresholds. Even your mail slot, if you have one, is a direct noise path.
For a comprehensive treatment of a typical two-storey Ottawa home backing onto the Queensway — including the highway-facing wall, window upgrades, attic sealing, and flanking path treatment — budget $15,000–$35,000 depending on the home's size and existing construction. That is a significant investment, but residents of Fisher Heights, Carleton Heights, and Meadowlands who have done this work consistently report transformative results — going from constant highway drone to genuine quiet. Ottawa pricing runs about 10 to 15 percent below comparable GTA projects.
A project of this scope benefits enormously from a professional acoustic assessment before any work begins — an experienced contractor can measure your existing noise levels, identify the dominant entry points, and prioritize your spending for maximum impact. Sound IQ can help you understand the principles, and the Ottawa Contractor Directory connects you with soundproofing professionals who regularly work on homes along Ottawa's highway corridors.Looking for experienced contractors? The Ottawa Construction Network connects homeowners with qualified professionals:613BinsJC CarpentryRegimbalGeerts Roofing IncSpeedy Pete's IncView all contractors →