IS 654

: 1992

Clay roofing tiles, Mangalore pattern

CurrentSpecializedSpecificationArchitectural · Roofing Materials
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This standard lays down the requirements for dimensions, performance, and testing of clay roofing tiles of the Mangalore pattern. It is used by civil engineers, architects, and contractors to ensure quality control, strength, and durability of terracotta sloped roofing materials.

Specifies requirements for clay roofing tiles of Mangalore pattern.

Quick Reference Values
standard size length x width410 mm x 235 mm
tolerance length± 10 mm
tolerance width± 5 mm
max water absorption20% (average of 6 tiles)
min breaking load class aa1300 N
min breaking load class a1000 N
Practical Notes
Visual inspection is critical; tiles should be well-burnt, free from cracks, and produce a clear ringing metallic sound when struck.
When detailing the roof, ensure the pitch is adequate (typically > 30 degrees) to prevent water ingress, as these tiles rely heavily on proper overlap and slope.
Water absorption tests require the tiles to be completely immersed in water; ensure tiles are dried to a constant mass before the initial weighing.