Waterproofing Quality Control Procedure
Standard operating procedure for waterproofing works ensuring long-term protection against water ingress, structural integrity, and durability through proper inspection and testing methods in accordance with Indian Standards (IS Codes).
Applications: Roofs, Basements, Bathrooms
Quality Priority: High
Validity: All Projects
To establish a comprehensive quality control procedure for waterproofing applications, ensuring long-term protection against water ingress, structural integrity, and durability through proper material selection, application techniques, inspection, and testing methods in accordance with Indian Standards (IS Codes).
- Cementitious waterproofing compounds (IS 2645:2003)
- Polymer modified cementitious coating (IS 16046:2013)
- Bituminous membranes and felts (IS 13826:1993)
- Liquid applied membranes (polyurethane/acrylic based)
- APP/SBS modified bituminous membranes
- Crystalline waterproofing additives
- Water stops and joint sealants (IS 1834:1984)
IS 2645:2003
IS 13826:1993
IS 16046:2013
- Primers and bonding agents (IS 3384:1986)
- Non-woven geotextile fabrics for reinforcement
- Fiber mesh for reinforcing coatings
- Corner reinforcement tapes/bands
- Protection boards/screed for exposed membranes
- Drainage boards/cells for basement applications
- PVC/HDPE water bars for construction joints
IS 3384:1986
- Wire brushes, scrapers, and grinding machines for surface preparation
- Mechanical mixers for preparation of cementitious materials
- Trowels, spatulas, and rollers for application
- Spray equipment for liquid membrane application
- Torches and gas cylinders for bituminous membrane application
- Moisture meters and thermometers for condition monitoring
- Flood test equipment (hoses, gauges, measuring devices)
- Pressure washing equipment for cleaning surfaces
- Verify surface is clean, dry, and free from dust, oil, and loose materials
- Check for cracks, honeycombing, and structural defects
- Ensure all repairs (concrete/plaster) are completed and cured
- Verify proper surface profile (smooth for membranes, roughened for coatings)
- Check moisture content of substrate (should be below 4-5% for most applications)
- Ensure rounded coves at wall-floor junctions (minimum 75mm radius)
IS 13182:1991
- Identify and check all penetrations (pipes, drains, conduits)
- Verify proper treatment of construction joints and expansion joints
- Check wall-floor junctions for proper preparation
- Verify proper slopes for drainage (min 1:100 for roofs, 1:80 for bathrooms)
- Inspect rainwater outlets and scuppers for proper installation
- Identify areas requiring additional reinforcement
IS 1346:1991
- Verify approved waterproofing material as per specifications
- Check material test certificates and IS compliance
- Verify shelf life and storage conditions of materials
- Review application methodology and sequence
- Check weather conditions for application (temperature 5-40°C, no rain forecast)
- Verify availability of all required tools and safety equipment
IS 2645:2003
IS 13826:1993
- Ensure a representative mock-up area is prepared
- Verify mock-up application follows approved methodology
- Check bond strength of waterproofing to substrate
- Confirm coverage rates and material consumption
- Verify thickness/number of coats as per specifications
- Document mock-up results and obtain approval before proceeding