Similar International Standards
EN 13956:2023CEN (European Committee for Standardization), Europe
HighCurrent
Flexible sheets for waterproofing - Plastic and rubber sheets for roof waterproofing - Definitions and characteristics
Specifies characteristics for modern plastic and rubber roofing membranes, the advanced successors to simple PE film.
BS 6229:2018BSI (British Standards Institution), UK
HighCurrent
Flat roofs with continuously supported flexible waterproof coverings - Code of practice
Provides application and design recommendations for roof waterproofing systems, analogous to the 'Recommendations for use' scope of IS 7290.
DIN 18531-1:2017DIN (Deutsches Institut für Normung), Germany
HighCurrent
Roof waterproofing - Part 1: Non-utilized and utilized roofs - Requirements and principles for design and execution
A comprehensive application standard detailing design and installation rules for roof waterproofing systems.
ASTM D4397-20ASTM International, USA
MediumCurrent
Standard Specification for Polyethylene Sheeting for Construction, Industrial, and Agricultural Applications
Specifies material properties for PE sheeting, but is not specific to roofing applications and covers a broader range of uses.
Key Differences
≠Material Technology: IS 7290 focuses exclusively on low-density polyethylene (LDPE) film, a relatively basic material. International standards like EN 13956 cover advanced engineered thermoplastic (PVC, TPO) and thermoset (EPDM) membranes with superior durability, UV resistance, and flexibility.
≠Application Method: The Indian standard specifies simple overlaps sealed with bitumen. Modern international practices (e.g., DIN 18531) mandate permanent jointing techniques like hot-air welding for thermoplastics or vulcanizing tapes for EPDM, creating a monolithic and more reliable seam.
≠System vs. Component Focus: IS 7290 is a recommendation for using a single component (the film). Standards like BS 6229 are comprehensive codes for the entire roofing 'system,' including insulation, vapour control, drainage, and detailing at penetrations and perimeters.
≠Exposure and Durability: IS 7290 mandates the PE film must be protected from sunlight by a cover screed. In contrast, many membranes under EN 13956 are designed to be fully exposed to weather and UV radiation for decades, incorporating advanced stabilizers.
Key Similarities
≈Fundamental Purpose: Both the IS code and its international counterparts share the primary goal of creating a continuous, impermeable layer on a roof to prevent water ingress.
≈Substrate Preparation: All standards emphasize the critical need for a clean, dry, smooth, and stable substrate to prevent punctures or damage to the waterproofing layer and ensure its long-term performance.
≈Requirement for Lapping: The principle of overlapping adjacent sheets to ensure a continuous barrier is common to all standards. IS 7290 specifies a 150 mm lap, while international standards also mandate specific minimum lap widths depending on the jointing method.
≈Use of Protective Layers: IS 7290 requires a protective screed. Similarly, international standards describe systems (e.g., Protected Membrane Roof) where the membrane is covered by ballast, pavers, or soil for protection against mechanical damage, UV, and temperature extremes.