Which component helps resist the water passage under hydrostatic pressure?

The component that effectively resists water passage under hydrostatic pressure is the waterproof membrane. This type of membrane is specifically designed to create a barrier that prevents water from penetrating through the structure, thereby protecting the integrity of the building. Waterproof membranes are typically made from materials like rubber, synthetic sheets, or modified bitumen, which are essential for areas prone to water exposure, such as roofs and foundations.

While water-resistant paint and water-shedding surface treatments contribute to overall moisture management in a building, they do not provide the same level of protection against hydrostatic pressure as a waterproof membrane. Drainage systems are critical as well, but they primarily manage water that has already entered an area, rather than preventing its entry in the first place. Therefore, a waterproof membrane is the key component that directly addresses the challenge of hydrostatic pressure and water intrusion.