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IBS PRIMAalpha Groove Fibre Cement Board

PRIMAalpha Groove is 7.5 mm thick fibre cement sheet with a 2.5 mm deep, 5 mm wide V-shaped groove, at 100mm centres, which replicates a traditional tongue and groove style panelling. Sheets are 1200 mm wide, 2400 mm or 2700 mm long. It is manufactured from Portland cement, finely ground sand, softwood cellulose fibres, additives, and water.

Manufactured to conform to the requirements AS/ NZS 2908.2: 2000, it is classified as Type B, Category 3. PRIMAalpha Groove can be used as an internal wall lining, or as an eave and soffit cladding providing it will not be directly exposed to the weather.

Key Features
  • Durability and long lifetime
  • Moisture damage and impact resistant
  • Environmentally friendly materials
  • Excellent strength and toughness
  • Waterproofing and fireproofing (non combustible)
  • Not prone to warping or cracking
  • Good acoustic insulation and weather resistance
  • Good thermal and heat insulation
  • Low maintenance
Scope of Use

IBS supply PRIMAalpha Groove for use within the following scope:

  • In wind zones up to and including extra high as defined in NZS3604:2011 or to a wind design pressure (ULS) of 2.5kPa.
  • In conjunction with a primary structure that complies with the NZ Building Code or where the designer and/or installer have satisfied themselves that the existing structure is suitable for the intended building work.
  • As an external soffit and eave lining (providing it will not be directly exposed to the weather)
  • As an internal lining
Limitations on Use
  • PRIMAalpha Groove must be installed in accordance with the manufacturer’s installation instructions in the relevant Prima Technical Manuals
  • Timber framing must comply with NZS 3604 or be specifically designed in accordance with NZS3603 and AS/NZS1170.
  • Steel framing must be in accordance with NASH Standard Part 2: May 2019 Light Steel Framed Buildings or be specifically designed in accordance with NZS3404 and AS/NZS 1170
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 NZBCClause B1 Structure — B1.3.1; B1.3.2; B1.3.3(a, j); B1.3.4(a, b, c, d)

  • B2 Durability: B2.3.1(b) when used as a substrate for tiles; B2.3.1(c); B2.3.2
  • C3 Fire affecting areas beyond the fire source: C3.4(a)
  • E3 Internal moisture: E3.3.4; E3.3.5; E3.3.6
  • F2 Hazardous Building materials: F2.3.1
Other Performance Attributes
  • Manufactured to conform to the requirements AS/ NZS 2908.2: 2000, it is classified as Type B, Category 3
B1 Structure compliant
B2 Durability compliant
C Protection from Fire compliant
Protection from Fire
E3 Internal Moisture compliant
Internal Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials

PASS 19043

CodeMark CM20210

CM20210 2020

Installation Guide

August 2021

Care and Maintenance Guide

August 2021

Warranty General Terms

August 2021


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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