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IBS PRIMAflex Fibre Cement Board

IBS PRIMAflex is a cellulose fibre cement panel. Each panel has a smooth, uniform face and is ready to be finished with a variety of paint, lightweight plaster systems or overlaid with ceramic tiles, slate, or stone composite products.

The panels are manufactured in a high-pressure chamber (called an autoclave) from high-grade cellulose pulp fibre, finely ground sand Portland cement and water. This process makes the panels strong, durable, and non-combustible. It is also moisture resistant and can help with soundproofing.

Key Features
  • Excellent weathering properties
  • Smooth finish for paint
  • Excellent acoustic performance
  • A very strong, versatile board
  • Environmentally friendly materials
  • Excellent strength and toughness
  • Waterproofing and fireproofing
  • Not prone to warping or cracking
  • Good acoustic insulation and weather resistance
  • Good thermal and heat insulation
  • Durability and long lifetime
  • Low maintenance
Scope of Use

IBS supply PRIMAflex for use within the following scope:


  • In NZS3604:2011 wind zones up to and including extra high or 2.5kPa ULS.
  • In all corrosion zones.
  • Within 1m of a relevant boundary.

Building scope:

  • On new buildings that comply with the New Zealand Building Code (NZBC) or existing buildings where the designer and installer are satisfied that the existing building is suitable for the intended building work
  • On timber or light gauge steel-framed buildings
  • On buildings with a risk score of less than 20, calculated in accordance with E2/AS1, table 2
  • On vertical and horizontal, flat surfaces, except for the tops of balustrades and parapets, which must have a minimum 50 slope
  • With aluminium and wood window joinery that is installed with vertical jambs and horizontal heads and sills
  • On a deck structure that has adequate fall to shed water
  • On flat or raking ceilings and soffits
  • In conjunction with a suspended ceiling design
  • In conjunction with a fire rated wall or ceiling design



Limitations on Use

Specification and installation must be in accordance with the PRIMAflex Design and Installation Guide.

  • Where restricted building work applies (RBW), PRIMAflex must be installed (or the installation must be supervised) by a Licenced Building Practitioner (LBP). 
  • PRIMAflex must not be installed on timber framing where the moisture content is greater than 18%. We recommend using seasoned or kiln-dried timber framing.
  • Proprietary suspended framing systems must be able to support the applied loads of panels. Always consult with the supplier/manufacturer for the recommended load that can be applied and the seismic requirements.
  • Consult with suppliers of waterproof membranes, tile adhesive, paint and plaster that selected products are compatible with PRIMAflex.
Statement of Building Code Compliance

If designed, used, installed and maintained in accordance with the scope, this product will meet the following provisions of the NZBC:

  • B1 Structure: B1.3.1; B1.3.2; B1.3.3(a, h, j); B1.3.4
  • B2 Durability: B2.3.1(b); B2.3.2
  • C3 Fire affecting areas beyond the fire source: C3.7
  • E2 External Moisture: E2.3.2; E2.3.5
  • F2 Hazardous Building Materials: F2.3.1
B1 Structure compliant
B2 Durability compliant
E2 External Moisture compliant
External Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials

PASS 17025

Care and Maintenance Guide

August 2021

Warranty General Terms

August 2021

Installation Guide

August 2021


Since 1993, IBS has been working with the top building products producers from around the world to bring New Zealand a panel product range to help Kiwis build better.

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