This standard specifies the requirements for two types of traditional clay roofing tiles: half-round and flat, commonly known as country tiles. It covers dimensions, tolerances, and physical properties like water absorption, transverse strength, and permeability. The standard provides testing methods to ensure a minimum quality level for these vernacular roofing materials.
Clay roofing country tiles, half round and flat tiles -Specification
Quick Reference Values
Maximum average water absorption20% by mass
Maximum water absorption for individual tile24% by mass
Minimum average transverse breaking load450 N
Minimum transverse breaking load for individual tile350 N
Permeability Test ResultShall be impermeable (no water drip after 24h)
Practical Notes
Country tiles are often irregular. Ensure proper overlap during installation as per tradition or manufacturer's guidance to prevent leakage.
Due to their lower transverse strength compared to modern machine-made tiles, handle them with care during transport and installation to minimize breakage.
The 'impermeability test' described in Annex C is a crucial quality check; it ensures tiles won't leak under ponded water.