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IS 12583:1988 is the Indian Standard (BIS) for corrugated bitumen roofing sheets. This standard specifies the requirements for corrugated bitumen sheets intended for use as roofing and cladding. It covers the materials, dimensions, physical properties such as water absorption and heat resistance, and the tests to verify these properties.
corrugated bitumen roofing sheets
Overview
Status
Current
Usage level
Specialized
Domain
Materials Science — Flooring, Wall Finishing and Roofing
Covers technical requirements for corrugated sheets based on bitumen-impregnated cardboard for roofing.
Key Differences
≠The European standard EN 534 specifies mandatory testing for flexural strength (bending strength), a critical mechanical property not required by IS 12583.
≠IS 12583 specifies a single grade of sheet, whereas EN 534 defines multiple classes based on mechanical strength (S, R, T) and thermal behavior, allowing for more specific application-based selection.
≠IS 12583 follows a prescriptive approach, defining minimum bitumen content (40%). EN 534 uses a performance-based approach, where composition is not mandated but performance (e.g., water impermeability, strength) is.
≠EN 534 is linked to the European Construction Products Regulation (CPR), mandating a formal conformity assessment (AVCP) and CE marking, a regulatory layer absent in the IS code.
Key Similarities
≈Both standards define the fundamental material composition as a base of organic cellulosic fibres impregnated and coated with bitumen.
≈Both IS 12583 and EN 534 identify water tightness/impermeability as a primary performance requirement and mandate a test to verify it.
≈The basic geometry of the sheets, defined by parameters like pitch and depth of corrugations, is specified in both standards with very similar target dimensions.
≈Both standards include a heat resistance test to ensure the sheets do not exhibit excessive bitumen bleeding or slumping at elevated temperatures.
Parameter Comparison
Parameter
IS Value
International
Source
Nominal Thickness
2.6 ± 0.4 mm
Declared by manufacturer, with minimums per class (e.g., >= 2.2 mm)
EN 534:2012
Pitch of Corrugations
95 ± 3 mm
95 ± 2 mm (for Profile 10)
EN 534:2012
Mass per unit area
≥ 2.9 kg/m²
Declared by manufacturer (typically 2.8 - 3.5 kg/m²)
EN 534:2012
Heat Resistance Test
No blistering or bitumen run-off at 70 ± 2 °C for 2 hours.
No bitumen drop formation at 80 °C (or higher, depending on class) for 2 hours.
EN 534:2012
Water Impermeability Test
No drop formation on underside after 24 hours.
No drop formation after 24 hours under a 100 mm water head (Method A).
EN 534:2012
Minimum Bitumen Content
40% by mass
Not explicitly specified; controlled via performance tests.
EN 534:2012
⚠ Verify details from original standards before use
Key Values7
Quick Reference Values
Minimum thickness2.5 mm
Maximum mass3.5 kg/m²
Pitch of corrugations95 ± 2 mm
Depth of corrugations35 ± 2 mm
Maximum water absorption (24h)2.0 % by mass
Heat resistance test temperature70 ± 2 °C
Minimum breaking load (transverse)500 N
Tables & Referenced Sections
Key Tables
Table 1 - Dimensions and Mass of Corrugated Bitumen Sheets
Table 2 - Physical Requirements of Corrugated Bitumen Sheets