What is the minimum thickness specified for an EPDM waterproofing sheet?

1.0 mm, as per Table 1 of IS 17290.

What is the minimum required tensile strength for EPDM sheets?

9.0 MPa, as specified in Table 2.

What is the minimum elongation at break required for EPDM sheets?

300 percent, according to Table 2.

Is this standard applicable for lining potable water tanks?

No, this standard is for general waterproofing. For potable water contact applications, materials must comply with separate standards like IS 16738.

IS 17290

: 2020

Ethylene Propylene Diene Monomer (EPDM) sheets for waterproofing - Specification

CurrentFrequently UsedSpecificationBIMMaterials Science · Waterproofing and Damp Proofing

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This standard specifies the requirements, sampling methods, and test procedures for Ethylene Propylene Diene Monomer (EPDM) sheets used in waterproofing applications. It covers material composition, physical properties like tensile strength and elongation, dimensional tolerances, and marking to ensure quality and performance in preventing water ingress in structures.

Specifies requirements for flexible Ethylene Propylene Diene Monomer (EPDM) sheets used as waterproofing membranes.

Quick Reference Values

Minimum Thickness1.0 mm

Minimum Tensile Strength9.0 MPa

Minimum Elongation at Break300 %

Minimum Tear Resistance20 kN/m

Maximum Water Absorption (7 days at 70°C)5 % by mass

Minimum Hydrostatic Pressure Resistance (at 2.5 mm thickness)70 m of water head

Practical Notes

Ensure compatibility of adhesives and primers with the EPDM sheet as per manufacturer's guidelines, as improper selection can lead to seam failure.

Seam integrity is critical for performance. Proper surface preparation, cleaning, priming, and application of seam tapes or adhesives are essential for a durable waterproof system.

Verify the sheet's UV stability for exposed applications like roofs. The standard provides an optional test for resistance to UV ageing (Clause 6.13).