Airborne Sound

Sound Insulation is one of the best ’sound dampening’ options available to increase the comfort of your home while adding more to the property’s value.

Insulation materials must comply with the STC (Sound Transmission Class) rating standard. The STC rating is a single number rating used to indicate the effectiveness of an entire construction assembly (partition, wall, floor/ceiling) in resisting the passage of airborne sound. The higher the STC rating, the better the sound insulation performance of the construction.

Audible sounds are defined as music, voice, or any other noises not related to impact sound; the higher the STC number the better the airborne sound insulation properties.

thermal Insulation for the home
Luxe display floor

NRC Rating Standar

The NZ Building code minimum standard for Sound insulation for floor coverings is NRC Noise Reduction Coefficient 55, carpet and underlay combined. Our Luxe Underlay performance ranges are unmatched in acoustic insulation, exceeding the NRC standard with no carpet.

Impact Sound

Footfall and Travelling Sound

Impact Insulation Class (IIC) is a rating for the ability of a floor-ceiling assembly to block impact/structure-borne noise from transmitting to the space below.

A floor-ceiling assembly with a low IIC rating will potentially cause distracting noise in the room below, leading to possible annoyance and problems with communication. IIC ratings for floor-ceiling assemblies above core learning spaces should be at least IIC-45 and preferably IIC-50 (measured without carpeting on the floor).

Impact sound originates when one body strikes another, such as in the case of footsteps, hammering, and objects falling. Impact sound travels through the structure with little loss of energy if the structure is continuous and rigid. Transmission of impact sound can be controlled by isolation; the higher the IIC number the better the impact sound insulation.

carpet swatch

Carpet Insulation

Setting the bar high

Impact Insulation Class (IIC) is a rating for the ability of a floor-ceiling assembly to block impact/structure-borne noise from transmitting to the space below.