Appraisal number: 1093 (2020)
Date issued: 1 Jul 2020
Ribon Continuous Interlocking Soffit System
The Ribon Continuous Interlocking Soffit System is a pre-finished, coil-coated steel roll-formed soffit panelling system for use on residential and commercial buildings. The system consists of Ribon soffit panels - interlocking roll-formed panels that are installed within purpose-made support brackets and channels. Ribon soffit panels have an effective cover width of 150 mm and are profiled to create an expressed joint to the soffit surface at panel edges.
The Ribon Continuous Interlocking Soffit System is appraised for use as a pre-finished roll-formed steel soffit lining system for use in residential and commercial buildings within the following scope:
- Buildings situated in wind zones up to and including extra high.
- Buildings situated in exposure zones B to D.
- Where installed over supporting timber or steel framing that is compliant with NZBC clause B1 Structure.
The Ribon Continuous Interlocking Soffit System is also appraised for use as a pre-finished roll-formed steel soffit lining system for use in residential and commercial buildings when screw fixed, subjected to wind pressures as given in Table 1 of the Appraisal.
Note: Ribon soffit brackets are required to be screw fixed to supporting structural framing at a maximum of 300 mm centres in all cases shown in the table. Supporting framing shall be subject to specific engineering design to ensure structural adequacy. The design of the supporting framing is outside the scope of this Appraisal.
The Ribon Continuous Interlocking Soffit System must only be installed horizontally on the underside of roof overhangs and projections. (Note: Using the Ribon Continuous Interlocking Soffit System as wall cladding has not been assessed by BRANZ and is outside the scope of this Appraisal.)
Ribon Continuous Interlocking Soffits - Technical Guide, March 2019
Always refer to the Appraisal in full and the Technical Literature