What is the maximum permissible water absorption for facing bricks?

Maximum 15% by weight after 24 hours of cold water immersion.

What is the acceptable limit for efflorescence?

Efflorescence must not be more than 'Slight'.

Are non-modular sizes allowed for facing bricks?

Yes, non-modular sizes like 230 x 110 x 70 mm and 230 x 110 x 30 mm are permitted alongside standard modular sizes.

IS 4860

: 1991

Facing Bricks - Specification

CurrentFrequently UsedSpecificationArchitectural · Masonry and Bricks

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This standard specifies the dimensions, physical requirements, and quality parameters for burnt clay facing bricks intended for use in exposed masonry without plaster.

Specifies requirements for burnt clay facing bricks used for aesthetic purposes in masonry construction.

Quick Reference Values

Standard modular size (Length x Width x Height)190 x 90 x 90 mm or 190 x 90 x 40 mm

Maximum water absorption15% by weight

Efflorescence limitSlight

Maximum warpage2.5 mm

Practical Notes

Facing bricks must be entirely free from cracks, flaws, and nodules of free lime to maintain the aesthetic and structural integrity of the facade.

It is highly recommended to construct a sample reference panel before bulk execution to ensure uniform color and texture.

Strictly monitor the efflorescence test results; any rating above 'Slight' can lead to severe aesthetic degradation (white staining) of exposed brickwork.