What are the common standard thicknesses of plain gypsum boards?

Standard thicknesses typically used are 9.5 mm, 12.5 mm, and 15 mm.

What is the acceptable tolerance for the thickness of a gypsum board?

The acceptable tolerance is ± 0.5 mm as per Table 1.

Are plain gypsum boards suitable for bathroom ceilings?

No, plain boards are intended for dry interiors. Moisture-resistant boards (Part 2) should be used in wet areas.

How is the physical strength of the board evaluated?

It is evaluated via a transverse breaking load test, ensuring the board supports minimum load values in both longitudinal and transverse directions as specified in Table 2.

IS 2095

: 2000

Gypsum Plaster Boards, Part 1: Plain Gypsum Plaster Boards

CurrentFrequently UsedSpecificationBIMArchitectural · Building Limes and Gypsum Products

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This standard specifies the requirements for manufacturing, standard dimensions, tolerances, physical properties, and testing methods of plain gypsum plaster boards used primarily for interior walls, ceilings, and drywall partitions.

Gypsum Plaster Boards, Part 1: Plain Gypsum Plaster Boards

Quick Reference Values

standard thicknesses9.5 mm, 12.5 mm, 15.0 mm

standard widths900 mm, 1200 mm, 1220 mm

tolerance on length± 5 mm

tolerance on width+ 0 mm to - 4 mm

tolerance on thickness± 0.5 mm

min breaking load longitudinal 12.5mm360 N

min breaking load transverse 12.5mm140 N

nominal mass per sqmapprox 6 to 12 kg/sqm depending on thickness

Practical Notes

Store boards flat on an even, dry surface to prevent warping and moisture absorption prior to installation.

Plain gypsum boards are highly susceptible to moisture; do not use them in wet areas like bathrooms or kitchens. Use water-resistant boards (IS 2095 Part 2) instead.

Ensure the correct edge profile (tapered, square, or bevelled) is specified based on the intended jointing and finishing methods.