IS 3067:1988 is the Indian Standard (BIS) for general waterproofing and damp-proofing of buildings. This code establishes the general principles and recommended practices for waterproofing and damp-proofing of buildings. It details the material selection, surface preparation, and application methodologies for treating roofs, walls (DPC), and basements against moisture ingress.
Covers general recommendations for waterproofing and damp-proofing of buildings using various materials and methods.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Basement Waterproofing Layers (for 1.5m water head) | 3 layers of bitumen felt (as per Table 1). | Not specified prescriptively. A suitable system (Type A, B, or C) must be designed to achieve a pre-defined performance grade. | BS 8102:2022 |
| Concrete W/C Ratio (for Integral Waterproofing) | Not to exceed 0.45. | Typically ≤0.40 to ≤0.45, often with stricter controls and requirements for specific admixtures to ensure low permeability. | ACI 515.2R-13 |
| Plastic Sheet DPC Thickness | 250 microns (1000 gauge) for polyethylene sheet. | Generally 300 microns (1200 gauge) or greater, and must conform to specific material standards like BS 6515 or BS EN 14909. | UK Building Practice / BS Standards |
| Bitumen Felt Lap Joint Width | 100 mm for both side and end laps. | Typically 75-100 mm for side laps and a larger 150 mm for end laps on roofing felts to improve water shedding. | BS 6229:2018 |
| Design Philosophy for Basements | Prescriptive, based on water head depth and providing a 'recipe' of materials and layers. | Performance-based and risk-assessed, considering soil, water table, and building's intended use to select a protection 'Type'. | BS 8102:2022 |
| Application Temperature (Hot Bitumen, e.g. 85/25) | 165-175 °C. | Varies by specific asphalt type, but generally within a 177-204 °C (350-400 °F) range for similar materials. | ACI 515.2R-13 |