Meeting New Zealand Building Code Requirements with Knauf Insulation
Intertenancy Acoustic Wall Insulation Solutions
When it comes to multi-dwelling construction in New Zealand, achieving compliance with the New Zealand Building Code (NZBC) is essential. One critical aspect of this compliance is meeting the acoustic insulation requirements for inter-tenancy walls. Under the NZBC, building elements such as walls, floors, and ceilings between household units must achieve a minimum Sound Transmission Class (STC) rating of 55. This ensures adequate soundproofing and privacy for occupants.
To meet these stringent requirements, the GIB® Barrierline System is a popular choice for inter-tenancy walls in multi-dwelling projects. This system, which features double stud framing, 13mm plasterboard on each side, and 11kg/m³ density acoustic insulation, achieves an impressive STC rating of 56-68, depending on the configuration.
A Compliant and Sustainable Solution
Knauf Insulation’s range of R2.2 Acoustic Wall Insulation has been approved as a substitute for the 11kg/m³ acoustic insulation specified in the GIB® Barrierline System. This substitution is supported by a statement of equivalence from Marshall Day Acoustics, confirming that an insulation infill material of the same density and thickness can be used without compromising the system’s acoustic performance. Additionally, Winstone Wallboards, the manufacturer of the GIB® system, has confirmed that the substitution does not affect the system’s warranty or fire performance.
At 90mm thick, the R2.2 Wall Insulation fits seamlessly between studs and nogs, ensuring a snug installation that minimises air gaps. This not only enhances acoustic performance but also contributes to the thermal efficiency of the building, creating a more comfortable and energy-efficient living environment.
A Proven Solution for Multi-Dwelling Projects
Knauf Insulation’s R2.2 Wall Insulation has already been successfully used in multi-dwelling projects across New Zealand. In a recent townhouse development, the project manager sought to substitute the specified R2.2 wall insulation infill with Earthwool® Glasswool. The substitution was approved based on the statement of equivalence from Marshall Day Acoustics and the confirmation from Winstone Wallboards. The result was a compliant, high-performing inter-tenancy wall system that met all acoustic and thermal requirements while delivering additional benefits for the building’s occupants.
By choosing Knauf Insulation’s R2.2 Wall Insulation products, you can ensure your project meets the NZBC’s acoustic requirements, achieves superior thermal performance, and provides a healthier, more comfortable indoor environment for residents.
For more information about Knauf Insulation’s range of products and their suitability for your next project, contact us today.
Why Choose Knauf Insulation Products
View our range of Inter-tenancy glasswool insulation
