New GIB® Intertenancy Barrier Systems for Terrace Homes

New GIB® Intertenancy Barrier Systems for Terrace Homes
December 12, 2016

With the rise in terrace home construction, the new GIBR Intertenancy Barrier Systems for Terrace Homes have been designed to provide an improved New Zealand Building Code (NZBC) compliant separating wall between attached dwellings. Technical literature is available now for download from the GIB® website along with CAD and BIM details or call the GIB® Helpline to order a physical copy.

GIB® Intertenancy Barrier Systems

The system consists of a double timber frame wall with a 25mm thick plasterboard barrier between the frames.

The primary fire resistance is provided by the central GIB Barrierline® plasterboard barrier, with the GIBR plasterboard wall linings contributing to some extent. This allows the wall linings to be used for structural bracing and to incorporate untreated penetrations. The basis of the acoustic performance is a double cavity system. This provides isolation from both airborne and impact sound. Insulation in both cavities is used to provide thermal comfort and noise attenuation levels and allows certain services to penetrate the wall linings.


High performance

  • GIB® Intertenancy Barrier Systems achieve between 61–68 Sound Transmission Class (STC), well in excess of the NZBC minimum for intertenancy walls (Clause G6).
  • 60 minute Fire Resistance Rating (FRR).

Cost effective

  • Comparing total cost of the system (including labour, foundations, equipment) GIBR Intertenancy Barrier Systems are some of the most cost effective in the market.
  • Compatible with GIB® Bracing systems and GIBFix® Framing Systems.

Narrow footprint

  • Maximise the available tenancy area of each unit.

Lightweight construction

  • No need for additional/specific foundation designs.
  • Particularly attractive in seismic areas.

Great buildability

  • No specialised subtrades for installation.
  • No specialised equipment like cranes.
  • Easy and fast to install.
  • No need to fire seal most standard electrical or plumbing penetrations that pass through the wall linings, these penetrations do not degrade acoustic performance.
  • Often results in faster council inspections due to fewer problems with penetration design.
  • No need to take the wall linings up to the roof space.

Performance and durability

GIB Barrierline® has a specialised formulation with a water and mould resistant core allowing GIB Barrierline® to be exposed to the elements in situ for up to 12 weeks giving you flexibility in construction. 16mm GIB Fyreline® used in the roof cavity can be exposed in situ for up to 4 weeks. Both products must stay dry and protected until installed. In addition, the products have been thoroughly tested in the lab and in construction trials specifically for New Zealand conditions. Testing has included extended element-exposed durability testing, freeze-thaw testing and soakage tests.


A GIB® Intertenancy Barrier System under construction

A short video can be viewed and the new literature downloaded from or ordered by calling the GIBR Helpline on 0800 100 442.

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