Residential Soffit — Ribon Continuous Interlocking Soffit System by Ribon

Residential Soffit — Ribon Continuous Interlocking Soffit System

Ribon

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Description

The Ribon Continuous Interlocking Soffit System is a pre-finished, coil-coated steel roll-formed soffit panelling system for residential and commercial buildings. The system features interlocking roll-formed panels that are installed within a proprietary bracketing system, designed specifically for horizontal installation on the underside of roof overhangs and projections.

The system components include:

Ribon soffit panels, which have an effective cover width of 150mm and are profiled to create an expressed joint at panel edges. The panels are manufactured from 0.55 BMT Colorcote Magnaflow or Magnaflow X pre-coated steel.
Support brackets, including wall brackets, soffit brackets, fascia pivot brackets, and extension brackets, manufactured from 0.70 mm to 1.15 mm BMT galvanised coated steel.
Edge and mitre trims, which are custom-folded 0.55 BMT Colorcote trims.

Key Features

Integrated Design: Combines fascia, soffit, spouting, and downpipe support into a single system using consistent materials, reducing sub-trade involvement and onsite costs.
Durable Materials: Manufactured from zinc/aluminium/magnesium coated pre-painted steel, suitable for use in harsh environments, including coastal areas.
Seamless Aesthetic: The interlocking design eliminates visible fixings, providing a clean, minimalistic finish.
Installation Efficiency: Custom-measured and roll-formed to length to reduce onsite waste to less than 3%. Panels can be removed and reinstalled if required for service access.
Versatility: Suitable for a wide range of applications, including architectural homes, multi-story developments, large-scale commercial projects, and internal ceilings.

Scope of Use

Residential horizontal soffits, including entrance ways, covered walk ways and outdoor areas such as porticos and porte cochere.
The system must only be installed horizontally on the underside of roof overhangs and projections.
Suitable for use with supporting timber, steel framing, or concrete structures compliant with NZBC Clause B1.
Suitable for use in buildings situated in Wind Zones up to and including Extra High.
Suitable for use in Exposure Zones B, C, and D.
Appraised for use in specific design wind pressures up to 8.56 kPa when concealed screw-fixed to support brackets.

Limitations on Use

Must only be installed horizontally. Use as wall cladding has not been assessed by BRANZ and is outside the scope of the appraisal.
Must be installed by specialist or approved installers trained by Ribon Limited.
Supporting framing is outside the scope of the BRANZ appraisal and must be specifically designed or comply with NZS 3604 or relevant steel framing standards.
Separation must be ensured between the soffit system and cladding materials unsuitable for contact (e.g. masonry veneer, CCA-treated timber).
Additional maintenance may be required in Exposure zone D.

Statement of Building Code Compliance

The Ribon Continuous Interlocking Soffit System, if designed, used, installed, and maintained in accordance with the conditions of Ribon Limited's technical literature, will comply with, or contribute to compliance with, the following performance provisions of the NZ Building Code:

Clause B1 STRUCTURE: Performance B1.3.1, B1.3.2, and B1.3.4.
Clause B2 DURABILITY: Performance B2.3.1 (b) 15 years and B2.3.2.
Clause E2 EXTERNAL MOISTURE: Performance E2.3.2.
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1.

In-Service History

The Ribon Continuous Interlocking Soffit System has been used in New Zealand since 2010, including the Aria Bay Apartments in Browns Bay, and the winner of the House of the Year for 2022.

Other Performance Attributes

Fire Performance: Components are manufactured from non-combustible materials with applied surface coatings less than 1mm thick.
Sustainability: The metal used is 100% recyclable, reducing hazardous building waste and onsite pollution.

Warranty & Maintenance

ColorCote provides a 15 year warranty
Ribon Limited gives a 2 year warranty on workmanship provided by an approved installer.
Regular maintenance is essential, including a manual wash down with water and a soft-bristled brush at least every six months to remove airborne salts and contaminants.
More frequent washdown maintenance may be required in coastal areas (Corrosion zone D).