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IS 1196:1978 is the Indian Standard (BIS) for laying bitumen mastic flooring. This code covers the preparation of the base, heating, laying, and finishing procedures for bitumen mastic flooring. It is primarily used by site engineers and contractors to ensure a durable, jointless, damp-proof, and heavy-duty wearing surface for industrial and commercial floors.
Code of practice for laying bitumen mastic flooring
Overview
Status
Current
Usage level
Specialized
Domain
Architectural — Flooring, Wall Finishing and Roofing
! Never overheat the bitumen mastic (above 200°C) during the melting process, as this will degrade the binder and reduce the flooring's lifespan.
! Ensure the concrete base is entirely dry, clean, and suitably primed before laying; trapped moisture will turn to steam under the hot mastic and cause blisters.
! Any blow-holes or blisters that appear during laying must be punctured and rubbed down with a wooden float while the mastic is still warm.
BS 8204-5:2004+A1:2010BSI - British Standards Institution, UK
HighWithdrawn
Screeds, bases and in situ floorings - Part 5: Mastic asphalt underlays and wearing surfaces - Code of practice
Provides a detailed code of practice for the design and installation of mastic asphalt flooring, closely matching the IS code's intent.
DIN 18354:2019-09DIN - Deutsches Institut für Normung, Germany
HighCurrent
German construction contract procedures (VOB) - Part C: General technical specifications in building contracts (ATV) - Mastic asphalt works
Defines the technical requirements for executing mastic asphalt works, including flooring, covering materials, application, and testing.
BS 6925:1988BSI - British Standards Institution, UK
MediumWithdrawn
Specification for mastic asphalt for building and civil engineering (limestone aggregate)
Specifies the constituent materials and properties of the mastic itself, which is referenced by the laying code (similar to how IS 1196 references IS 1195).
Key Differences
≠Modern international standards (e.g., based on EN standards) explicitly include and encourage the use of Polymer Modified Bitumen (PMB) for enhanced flexibility, temperature resistance, and durability. IS 1196:1978 is based on conventional paving grade bitumen.
≠European standards like BS 8204-5 specify more advanced priming systems for concrete bases, often proprietary polymer-based primers, for superior adhesion compared to the 'residual bitumen' mentioned in the IS code.
≠International codes often provide more detailed guidance on separating layers and underlays (e.g., sheathing felt, glass-fibre tissue) to accommodate substrate movement and prevent reflective cracking, especially over large areas or non-concrete bases.
≠The typical heating and application temperatures specified in European practice (e.g., 200°C - 230°C) are often slightly higher than the range given in IS 1196 (175°C to 205°C), which can affect workability and compaction.
Key Similarities
≈All standards mandate that the sub-floor must be structurally sound, clean, dry, and free from loose materials before application begins, recognizing this as a critical step for successful installation.
≈The fundamental application process is identical: heating solid blocks of mastic until molten, pouring onto the prepared base, and spreading to the required thickness using hand tools like wooden floats.
≈The technique for creating seamless day-work joints is consistent across standards, involving the reheating of the edge of the previously laid and cooled section to ensure a fully bonded, monolithic surface.
≈All related standards strongly emphasize the need for strict safety protocols due to the very high temperatures involved, including proper ventilation, personal protective equipment (PPE), and fire prevention measures.
Parameter Comparison
Parameter
IS Value
International
Source
Application Temperature on Site
175°C to 205°C
Typically 200°C to 230°C, depending on grade
BS 8204-5:2004
Minimum Thickness (Heavy Industrial)
25 mm
25 mm to 40 mm, based on specific load classification
BS 8204-5:2004
Primer on Concrete Base
A coat of residual bitumen of suitable grade
Special bitumen primer or appropriate bitumen emulsion
General practice in BS 8204-5 / DIN 18354
Binder Specification
Paving grade bitumen (as per IS 1195)
Paving grade bitumen or Polymer Modified Bitumen (PMB)
General practice in modern EN-based standards
Underlay on Timber Sub-floor
One layer of building paper
Black sheathing felt or glass fibre tissue separating layer
BS 8204-5:2004
Finishing Technique
Finished with wooden float, can be sanded with coarse sand.
Finished with wooden float, often followed by rubbing with coarse sand and cement mix for a gritted finish.
BS 8204-5:2004
⚠ Verify details from original standards before use
Key Values6
Quick Reference Values
Maximum heating temperature for bitumen mastic200 °C
Recommended laying temperature170 °C to 200 °C
Minimum curing period for concrete base before laying28 days
Typical thickness for light duty flooring15 mm
Typical thickness for heavy duty/industrial flooring25 mm to 50 mm
Can bitumen mastic be laid on a wet or damp base?+
No, the concrete base must be completely dry and fully cured (minimum 28 days) to prevent blistering of the mastic layer.
What is the correct temperature for laying bitumen mastic?+
It should be laid hot, typically between 170°C and 200°C. Temperature should be strictly monitored with a thermometer.
How is the finished surface achieved?+
The hot mastic is spread with a wooden float to the required thickness and rubbed to a smooth finish. Fine sand or stone dust is often rubbed into the surface while it is still warm to improve slip resistance.