Swimming pool construction requires careful waterproofing and structural design. Concrete shell construction involves concrete excavation, forming, and placement. The concrete must be watertight and durable. Structural analysis verifies the shell resists hydrostatic pressure and soil loads. Waterproofing membranes provide backup waterproofing if concrete develops leaks. Vinyl liner pools use a flexible membrane supported by concrete or structure. Liners are typically 20 to 40 mils thick. Proper installation prevents wrinkles and ensures even coverage. Fiberglass pools are pre-manufactured and set in excavation. One-piece installation simplifies construction. Deck sloping drains water away from the pool. Deck surface must prevent slipping when wet. Non-slip coatings or textured surfaces provide safety. Circulation systems pump water through filters and treatment equipment. Skimmers at the surface remove debris. Main drains at the bottom facilitate drainage. Equipment rooms house pumps, filters, heaters, and chemical treatment systems. Proper equipment sizing ensures adequate circulation and filtration. Deck drains and suction drains must be protected. Proper drain design prevents entrapment hazards. Bonding and grounding prevent electrical hazards.