Grizzly Construction 4-Plex Conversion

Grizzly Construction

Overview

When a property owner in Hamilton, Ontario, decided to transform a single-family home into a 4-plex, their primary goal was to create a premium living experience free from the noise concerns common in multi-unit housing. They wanted each resident to enjoy peace, privacy, and comfort without the disruptions caused by sound transfer. Aware that meeting only the minimum code requirements would not be enough to achieve this, the owner turned to Grizzly Construction to implement a solution that could deliver top-tier noise control.

Solution

Grizzly Construction developed a layered soundproofing strategy using multiple complementary materials and techniques. At the core of this approach was the installation of SONOpan 4×8 soundproofing panels, providing a continuous barrier for effective noise reduction. These panels were paired with resilient channels to absorb impact noise and vibrations, insulation to address resonance, and 5/8″ drywall to add density and block sound penetration. Grizzly also performed detailed sealing of gaps, seams, and cracks — preventing even small paths for sound to escape. This ensured both airborne and impact noise were addressed comprehensively, resulting in a system far more robust than the industry standard.

Results

The completed assembly exceeded the initial expectations, delivering sound attenuation performance that surpassed building code requirements. By combining multiple noise-control technologies in a single design, Grizzly Construction significantly reduced sound transfer between units, creating a more harmonious and marketable rental property. This strong commitment to quality not only improved the living experience for tenants but also enhanced the property’s value and competitiveness in the rental market.

Applications

While this soundproofing method was applied in a multi-unit conversion, its benefits can be applied in many everyday settings. Homeowners can use SONOpan panels and similar layered assembly techniques to reduce noise in basements, bedrooms, or home offices. Apartment dwellers can benefit from quieter environments and greater privacy by adding these upgrades during renovations. In home theaters, this type of system can contain cinematic sound within the room while preventing external noise interruptions. Even in workplaces, it can improve focus and protect confidential discussions. By making professional-grade sound control technology accessible for residential and commercial spaces, SONOpan empowers everyday users to enjoy peace, comfort, and privacy — just as it did for the tenants of this 4-plex.
English