External wall systems are required to provide both weathertightness and structural bracing in accordance with the New Zealand Building Code (NZBC). These functions are often delivered through multiple products and installation steps.

IBS RigidRAP is designed as a rigid sheathing system that can be used as both a rigid air barrier and a bracing element, depending on the specific design and installation method.

Rigid air barrier and bracing element in one

IBS RigidRAP is an 8mm OSB3 (Oriented Strand Board) panel laminated with an approved building paper, manufactured for use in residential and light commercial timber-framed buildings, subject to design and specification requirements.

When installed on the outer face of framing, IBS RigidRAP forms part of the external wall assembly, providing benefits as a rigid air barrier and bracing element. 

When used as a rigid air barrier, IBS RigidRAP:

• Acts as a barrier to air pressure and water infiltration into the building envelope
• Provides temporary weather protection (for up to 90 days during construction)
• Provides a solid substrate for window, door, and penetration flashing systems Structural Bracing

IBS RigidRAP can also be used as a bracing element when installed in accordance with tested systems:

• Bracing capacity varies depending on system configuration and fixings
• Tested systems include combinations with GIB HandiBrac and standard timber framing

CodeMark certified for straightforward compliance

IBS RigidRAP is CodeMark certified, offering the straightforward compliance with councils. 

Under this certification:

• Building Consent Authorities must accept the product as complying with the NZ Building Code, provided it is specified and installed in accordance with the certificate conditions
• Designers and installers can specify the system with reference to its certified performance

On-site benefits

IBS RigidRAP offers key installation and on-site benefits, including: 

• Lightweight and installed using standard fixing methods
• Applied directly to framing as part of the wall build-up
• Temporary weather protection for up to 90 days when exposed
• A combined system that can replace separate wall wrap and bracing elements

When used as a rigid air barrier or bracing system, installation must be carried out in accordance with:

• IBS installation guidelines
• NZBC requirements
• Relevant standards such as NZS 3604