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IBS KalsiFlex

KalsiFlex is a premium lining board. Manufactured from a precise combination of cement, silica and cellulose, the boards are cured and stabilised in an autoclave — a special process involving steam, high temperatures and pressure — that ensures optimum dimensional stability and mechanical resistance.

KalsiFlex fibre cement boards and planks are durable and highly resistant to most environmental conditions. They are the best alternative to wood, concrete and masonry constructions.

Key Features
  • Durable and water proof
  • Easy to install
  • Dimensional stability
  • Mechanical resistance
  • Highly resistant to most environmental conditions
  • Best alternative to wood, concrete and masonry constructions
Scope of Use

KalsiFlex is an autoclaved cellulose fibre-reinforced cement sheet available in in 4.5mm, 6.0mm and 9.0mm thicknesses and sheet sizes from 300mm – 1200mm (w) x 2400mm – 3000mm (l) (Refer Technical literature for details).

IBS supplies KalsiWAB fibre cement board (KalsiWAB) for use as

  • Suspended ceilings
  • External ceiling lining
  • Soffit & eaves lining
  • Subfloor enclosure
  • Wall lining
  • Floor or deck substrate for ceramic tiles, slate and stone composite products
  • Deck substrate for waterproof membranes
Limitations on Use

KalsiFlex is an internal wall and ceiling lining in wet and dry areas, and external ceiling, soffit and eaves lining where not exposed to the weather.

  • in applications where a Material Group Number is required (clause C3.4(a)), the Kalsi fibre-cement board is at least 6mm thick and any waterborne or solvent borne paint coating is not greater than 0.4mm thick
  • in wet areas the Kalsi fibre-cement board is at least 9mm thick and coated with water resistant paint or tiles 
  • in areas adjacent to food preparation the Kalsi fibre-cement board is at least 9mm thick and coated with water resistant paint or tiles 

Kalsi fibre-cement boards shall be installed in accordance with the installation instructions provided by IBS in its Installation Guide

Statement of Building Code Compliance

If designed, installed and maintained in accordance with all IBS requirements, the KalsiFlex product will meet the following provisions of the NZBC:

  • Clause B1 Structure — B1.3.1; B1.3.2; B1.3.3(b); B1.3.4 (B1.3.3(j) applies to KasiFlex used as wall lining)
  • Clause B2 Durability — B2.3.1(b); B2.3.1(c) (B2.3.1(b) when used as a substrate for tile)
  • Clause C3 Fire affecting areas beyond the fire source — C3.4(a)
  • Clause E3 Internal moisture — E3.3.3 (contributes to); E3.3.4 (contributes to); E3.3.5 (contributes to); E3.3.6 (contributes to)
  • Clause F2 Hazardous Building materials — F2.3.1
  • Clause G3 Food preparation and prevention of contamination — G3.3.2(a) (Contributes to)
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
G3 Food Preparation and Prevention of Contamination compliant
Food Preparation and Prevention of Contamination
Technical Data Sheet
CodeMark CM70106

CM70106 2022

Installation Guide

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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