Is this standard for asbestos sheets?

No, IS 14862 is exclusively for non-asbestos fibre cement products.

What is the minimum bending strength (MOR) for a corrugated roofing sheet?

For Class A corrugated sheets, the minimum Modulus of Rupture is 14 MPa in the longitudinal direction (Table 2).

What are the standard lengths of corrugated sheets?

Standard lengths are 1.5, 2.0, 2.5, and 3.0 meters (Table 1).

What is the maximum allowed water absorption?

For Class A corrugated sheets, the maximum water absorption is 28% by mass (Table 2).

IS 14862

: 2000

Fibre cement sheets and boards for roofing and general building purposes

CurrentFrequently UsedSpecificationBIMMaterials Science · Roofing Materials

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This standard specifies the requirements for non-asbestos fibre cement corrugated sheets and flat boards used for roofing, cladding, partitions, and general building purposes. It covers material composition, dimensions, physical properties like bending strength and water absorption, and testing methods.

Specifies requirements for asbestos-free fibre cement sheets and boards used in roofing and general building.

Quick Reference Values

Minimum Modulus of Rupture (Corrugated Sheet, Class A, longitudinal)14 MPa

Maximum Water Absorption (Corrugated Sheet, Class A)28 %

Minimum Density (Corrugated Sheet, Class A)1.40 g/cm³

Standard lengths of corrugated sheets1.5, 2.0, 2.5, 3.0 m

Water Tightness Test RequirementNo formation of water drops on the underside

Thickness Tolerance for Flat Sheets± 10% or 0.5 mm, whichever is greater

Practical Notes

This code is exclusively for *non-asbestos* fibre cement sheets; do not confuse it with older asbestos cement (AC) sheet specifications.

Pay close attention to the manufacturer's handling and installation instructions, as sheets can be brittle if improperly handled.

Ensure correct overlap and use of specified accessories (e.g., self-drilling screws with EPDM washers) for weather-tightness.