Below is a precise method statement for water proofing works using self adhesive membrane materials from any brand.
Following equipment and tools shall be required before starting the water proofing work.
- Slow speed drill machine
- Gas Cylinders
- Hand Tools & PPE
- Trowel
- Straight edge
- Knife
- Gloves
- Solvent cleaner
- Measuring Tape
- Fire Extinguisher
The capacity / size of the above tools and equipment shall be judged in accordance with site conditions, requirements, and availability at the time of execution.
SAFETY & HEALTH
All employees shall be provided with complete personal Protection equipment PPE.
Employees shall attend Safety Induction and training Course to identify all Hazards associated with this work.
All workers shall be provided with proper tools and equipment to execute the work safely.
MSDS (material safety data sheet) shall be displayed at work location as appropriate.
PROCEDURE
Surface shall be clean, dry and free from loose particles before application of water proofing.
If any repairing for the surface is required it shall be done by approved material.
Chamfer and angle fillet shall be provided on all the corners.
Water proofing system shall be applied in strict compliance to Manufacturer’s recommendations / instructions and by certified workers.
Solvent based primer should be applied evenly around the faces by brush or Roller @ 0.3 –0.5 kg/m2.
Allow the primer to dry prior to application of water proofing.
Ensure that all the workers to wear proper PPEs.
Membrane to be fully bonded by torching to the primed surface.
Care shall be taken while fixing the membrane as it should not be puncher or damaged.
The longitudinal overlap should not be less than 100 mm and should be staggered a minimum 150 mm with those of the eventual first layer.
The end lap should not be less than 150 mm and should be staggered a minimum 300mm with those of the first layer.
Asphalt board shall be fixed over the membrane for protection.
Asphalt board shall be fixed by torching and making spot adhesion with the membrane.
After fixing the protection board foundation could be back filled.
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