Quiet from the Ground Up: A Guide to Regupol Sonus Core Impact Sound Control Underlayment

In today's world of multi-family housing, mixed-use buildings, and open-concept spaces, controlling sound transmission is more important than ever. Whether you're trying to keep footsteps from echoing through a luxury condo or reduce impact noise in a commercial space, a high-performance acoustic underlayment is key—and that’s where Regupol Sonus Core comes in.

What Is Regupol Sonus Core?

Regupol Sonus Core is a line of high-performance, environmentally friendly acoustic underlayments designed to reduce impact sound transmission through floor-ceiling assemblies. It’s part of Regupol's larger family of sound control products, and it's known for its effectiveness, durability, and versatility across a wide range of flooring types and construction methods.

How Is It Made?

Sonus Core is manufactured from recycled rubber, making it a sustainable choice for green building projects. The material is dense, resilient, and engineered to perform under a variety of conditions—whether installed under hard flooring like tile, laminate, hardwood, or even certain types of carpet and luxury vinyl tile (LVT).

Where and How It's Used

Regupol Sonus Core is used as an underlayment beneath finished flooring materials, typically in applications like:

• Multifamily residential buildings

• Hotels and hospitality projects

• Commercial offices

• Educational institutions

• Mixed-use developments

It’s particularly useful in buildings where impact noise control is required to meet building codes or achieve acoustical ratings such as IIC (Impact Insulation Class) and STC (Sound Transmission Class).

Understanding Thickness Options: Which One Do You Need?

Regupol Sonus Core comes in various thicknesses, typically ranging from 2 mm up to 12 mm. Here’s a general breakdown:

• 2 mm – 3 mm: Best for use under resilient flooring such as LVT or sheet vinyl where minimal floor height is available, but some impact noise control is still required.

• 5 mm – 6 mm: A solid all-around option for laminate or engineered hardwood installations in residential or light commercial spaces.

• 8 mm – 12 mm: Ideal for high-performance applications where superior noise reduction is needed—like luxury condos, hotels, or areas with heavy foot traffic and stringent sound requirements.

Pro tip: Thicker underlayments generally provide better IIC ratings, but they also raise the finished floor level. Always balance acoustical performance with project-specific constraints like door clearance and transitions.

Installation Notes

Regupol Sonus Core is typically installed using a full-spread adhesive method, though some versions may allow for floating installations depending on the flooring type. Always follow the manufacturer’s installation guidelines and compatibility charts for best results.

And don’t forget: Proper perimeter isolation (like using edge strips or acoustic sealant) is just as important as the underlayment itself when it comes to achieving desired sound control ratings.

Eco-Friendly + Code Compliant

In addition to excellent performance, Sonus Core is a LEED-contributing product thanks to its recycled content and low VOC emissions. It also meets a variety of building code requirements, including those set by the International Building Code (IBC) and local ordinances requiring minimum IIC and STC ratings.

The Right Underlayment Makes All the Difference

Whether you're building up or renovating down, the right acoustic underlayment can transform a noisy room into a peaceful one. Regupol Sonus Core gives architects, contractors, and designers the tools they need to meet acoustical goals without compromising on sustainability or performance.

If you're not sure which thickness or installation method is right for your project, don’t hesitate to reach out to a Regupol representative—or drop us a message, and we’ll help you find the best fit.