You are using an outdated browser version not supported by this website.
Click here to upgrade your browser

KAPO Calcium Silicate Exterior Perimeter Board

KAPO Calcium Silicate Board (KAPO) is manufactured from non-toxic minerals incorporating a woven mesh, which exhibits excellent fire, sound, moisture and mould resistant properties. It is light weight, high bending and autoclaved for superior durability and flexibility. 

When used as Perimeter Board, KAPO provides protection to slab insulation.

Key Features
  • Produced from natural, inorganic raw materials and the chemical reaction is irreversible which results in a chemically stable board that is hard but flexible
  • Light weight and high bending strength, it can be easily handled and conveniently installed
  • Light, fireproof and waterproof
  • Will not rot or physically deteriorate and it is highly resistant to the effects of moisture
  • Safe to work with, containing no hazardous materials and is 100% asbestos free
  • Resistant to climatic conditions and moisture - tested to many cycles of soaking, freezing and heating (freeze/thaw test method)
  • It has excellent workability that can be cut, drilled, sanded and worked with proper tools and machinery
  • It does not harbour insects, mildew, mould, fungus or bacteria
  • 20 years warranty - must adhere to manufacturer recommended maintenance programme
In-Service History

Enviro Square's KAPO Board manufacturer represents the vast majority of the Chinese market. What is more, they have been delivered in large volume to many European countries like Italy, Sweden, Norway, Russia, UK, Spain, Poland and many other countries in Southeast Asia and Middle East.

In recent years they have set up close co-operative relationships with customers in New Zealand, South America, USA and Canada. The reliable quality and reasonable price of the products have earned KAPO Board recognition and favour from the customers in both the domestic and overseas markets. 

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
G6 Airborne and Impact Sound compliant
Airborne and Impact Sound
Independent Assessment
Independent Assessment
Test Results
Test Results
KAPO Technical Manual


BEAL Product Appraisal: KAPO Board

exp May 2023

BRANZ Fire Testing


Test Results: Acoustic Testing


Test Results: Bracing


Test Results: Exterior Exposure


Product Warranty


Enviro Square was set up to promote the use of environmentally friendly building materials and create a better living environment with one of the more advanced building materials in New Zealand.

Product Enquiries

News from Enviro Square

Durable KAPO Board with Microtopping Finish Features in Passive House Bathroom
KAPO Board Demonstrates Superb Moisture Resistance
Enviro Square Meets Group 1-S for Interior Wall Linings
Get a free weekly digest of essential news

New and updated architectural products, design solutions, inspiration, technical advice and more when you sign up for EBOSS.