First: Tank Insulation (Epoxy and DCP) The correct explanation to the client is in 4 stages: 1. Cleaning and Preparation: Completely drain water and clean walls and floor from impurities and dust to ensure material adhesion. 2. Nesting Treatment (DCP): Inspect tank corners and walls, and treat any "nesting" or cracks with a strong cement mixture using specialized DCP materials. 3. Primer Coat (Primary): Apply a base coat to seal concrete pores. 4. Epoxy Coat (Epoxy): Apply a final coat with approved food-grade epoxy (blue or white) that prevents leakage and inhibits the growth of bacteria and algae. 🏠 Second: Roof Insulation (Rolls) The correct technical explanation to ensure prevention of rainwater leakage: 1. Surface Preparation: Clean the surface from sand and sharp concrete protrusions. 2. Primer Application: Apply "primer" (liquid asphalt) to the entire surface to act as a strong adhesive for the rolls. 3. Roll Installation (Bitumen Rolls): Lay out all types of rolls (Polyflame or Sitchel), ensuring a 10 cm overlap between each roll to prevent water leakage from joints. 4. Flame Welding: Use a "torch" (flame) to meticulously weld the rolls together and to the floor, extending the insulation up the roof walls (neck) by 20 cm.