Water tank waterproofing is essential to prevent water leakage and damage to the structure. Here are the general steps involved in waterproofing a water tank:

1. Empty the Tank:

   • Before starting any waterproofing work, ensure that the water tank is completely emptied and cleaned.

2. Surface Preparation:

   • Clean the tank surface thoroughly to remove any dirt, algae, or contaminants. Ensure that the surface is dry before proceeding.

3. Crack Repair:

   • Inspect the tank for any cracks or fissures. Repair these using a suitable waterproof filler or sealant.

4. Priming:

   • Apply a primer to the entire surface of the tank. Priming helps improve the adhesion of the waterproofing material.

5. Waterproofing Membrane Application:

   • Choose an appropriate waterproofing material for the tank. Common options include liquid-applied coatings, bitumen-based coatings, or epoxy coatings. Apply the selected membrane evenly over the tank surface.

6. Joint Sealing:

   • Pay special attention to joints, corners, and areas where different surfaces meet. Seal these joints with a flexible and waterproof sealant.

7. Curing:

   • Allow the waterproofing material to cure according to the manufacturer's recommendations. Curing times may vary depending on the type of material used.

8. Quality Check:

   • Inspect the entire waterproofing application to ensure uniform coverage and proper adhesion. Check for any visible defects or areas that may need additional attention.

9. Interior Coating (Optional):

   • In some cases, an additional interior coating may be applied to the water tank to provide an extra layer of protection against corrosion and contaminants.

10. Refill the Tank:

    • Once the waterproofing material has cured and the quality check is satisfactory, refill the water tank.

It's crucial to use waterproofing materials that are safe for potable water, especially when waterproofing water storage tanks. Additionally, hiring a professional waterproofing contractor with experience in water tank waterproofing is advisable to ensure that the work is done correctly, and the water remains safe for consumption.

Regular inspections and maintenance are also recommended to address any potential issues promptly and extend the life of the waterproofing system.