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IS 1464:1986 is the Indian Standard (BIS) for clay ridge and ceiling tiles. This standard specifies the requirements for dimensions, tolerances, and physical properties such as water absorption and breaking load for clay ridge and ceiling tiles used in building construction.
Specifies requirements for clay ridge and ceiling tiles.
EN 1304:2013CEN - European Committee for Standardization
HighCurrent
Clay roofing tiles and fittings - Product definitions and specifications
Directly covers clay ridge tiles (as 'fittings') and their performance requirements.
ASTM C1167-22ASTM International (USA)
HighCurrent
Standard Specification for Clay Roof Tiles
Covers clay roof tiles and 'accessory tiles,' which includes ridge and hip tiles.
AS 2049-2002 (R2016)Standards Australia
MediumCurrent
Roof tiles
Specifies requirements for clay (terracotta) roof tiles and associated fittings like ridge tiles.
BS 5534:2014+A2:2018BSI - British Standards Institution (UK)
LowCurrent
Slating and tiling for pitched roofs and vertical cladding - Code of practice
A code of practice for installation, referencing product standards like EN 1304 for tile quality.
Key Differences
≠IS 1464 has no requirement for frost resistance testing, whereas standards like EN 1304 and ASTM C1167 have mandatory freeze-thaw cycle tests, reflecting the climatic differences between India and Europe/North America.
≠IS 1464 is highly prescriptive, setting absolute minimums (e.g., <20% water absorption). EN 1304 is more performance-based, requiring manufacturers to declare performance against defined classes, allowing for a wider range of product grades.
≠Modern international standards like EN 1304 include a mandatory water permeability test to ensure the tiles' ability to shed water, a performance characteristic not quantitatively measured in IS 1464.
≠IS 1464 uniquely includes specifications for 'ceiling tiles' used in filler slab construction, a product type and application not explicitly covered in the scope of roofing-focused standards like EN 1304 or ASTM C1167.
Key Similarities
≈All standards mandate the core material to be suitably fired clay and require it to be well-burnt and free from defects that would compromise strength or durability.
≈The fundamental mechanical test for transverse breaking strength is a common requirement across all standards to ensure the tiles can withstand handling and service loads.
≈All standards include a water absorption test as a key indicator of tile durability and material quality, although the methods and acceptance limits vary.
≈All standards place importance on dimensional accuracy and include permissible tolerances for length, width, and thickness to ensure proper fit and uniform appearance upon installation.
Parameter Comparison
Parameter
IS Value
International
Source
Water Absorption (Maximum)
≤ 20% (by mass, 24-hr cold water immersion)
≤ 6% for Grade 1, ≤ 12% for Grade 2, ≤ 15% for Grade 3 (lowest grade)
ASTM C1167-22
Transverse Strength (Breaking Load for Ridge Tile)
≥ 900 N (average)
≥ 1330 N (300 lbf) (minimum for individual wet tile, varies by profile)
ASTM C1167-22
Frost Resistance Test
Not specified
Mandatory, must pass a specified number of freeze-thaw cycles (e.g., 150 cycles for Method C)
EN 1304:2013
Water Permeability Test
Not specified
Required; manufacturer must declare performance (Level 1 or Level 2)
EN 1304:2013
Dimensional Tolerance on Length
± 5% on specified length
Manufacturer declares nominal length; consistency is checked (range of 10 tiles)
EN 1304:2013
Product Types Covered
Clay ridge tiles and clay ceiling tiles
Clay roofing tiles and fittings (which includes ridge tiles)
EN 1304:2013
⚠ Verify details from original standards before use
Key Values3
Quick Reference Values
maximum water absorption20% by mass after 24 hours immersion