IS 7193:2013 is the Indian Standard (BIS) for glass fibre base bitumen felts. This standard specifies the requirements for glass fibre base bitumen felts intended for use in waterproofing and damp-proofing. It covers the classification, materials, manufacture, dimensions, physical properties like strength and pliability, and test methods. The felts are categorized into types and grades for different applications such as roofing, tanking, and damp-proof courses.
glass fibre base bitumen felts
Overview
- Status
- Current
- Usage level
- Specialized
- Domain
- Materials Science — Waterproofing and Damp-Proofing
- Type
- Specification
Also on InfraLens for IS 7193
Practical Notes
! Type 2 felts are generally used for roofing applications, while Type 1 is for tanking and damp-proofing. Always verify the type specified matches the intended use.
! Ensure rolls are stored vertically on-site and protected from direct sunlight and physical damage to maintain material integrity.
! Look for the BIS certification mark (ISI Mark) on the product packaging as a primary check for quality compliance.
Frequently referenced clauses
bitumenglass fibrewaterproofing feltdamp proofing
International Equivalents
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International Comparison — Coming Soon
We're adding equivalent international standards for this code.
Key Values7
Quick Reference Values
Standard roll width1000 mm (±1%)
Standard roll length20 m (±1%)
Pliability test mandrel diameter20 mm
Min breaking strength (longitudinal, Type 1)200 N/50 mm
Min breaking strength (longitudinal, Type 2)350 N/50 mm
Max water absorption1.0 percent by mass
Heat resistance test temperature85 ± 2 °C
Tables & Referenced Sections
Key Tables
Table 1 - Requirements for Dimensions and Mass of Glass Fibre Base Bitumen Felts
Table 2 - Physical Requirements for Glass Fibre Base Bitumen Felts
Table 3 - Scale of Sampling and Criteria for Conformity
Key Clauses
Clause 3 - Classification
Clause 4 - Materials
Clause 6 - Dimensions and Mass
Clause 7 - Physical Requirements
Clause 10 - Sampling and Criteria for Conformity
Frequently Asked Questions4
What are the standard dimensions of a roll of bitumen felt as per IS 7193?+
A standard roll is 1 meter wide and 20 meters long, as specified in Table 1.
What is the key difference between Type 1 and Type 2 felt?+
Type 2 felt has a higher breaking strength requirement (350 N/50mm) and is intended for roofing, while Type 1 (200 N/50mm) is for general damp-proofing and tanking (Clause 3 and Table 2).
How is the flexibility or pliability of the felt checked?+
The pliability test involves bending a sample around a 20 mm diameter mandrel at a specified low temperature (e.g., 10°C). The sample should not show any cracks (Clause 7.5).
What are the surfacing materials used on these felts?+
Surfacing materials can be mineral powder (like talc), sand, or polyethylene film to prevent layers from sticking together in the roll (Clause 4.4).
QA/QC Inspection Templates
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QA/QC templates coming soon for this code.