The best waterproofing is a multi-layer system that includes a moisture barrier, drainage layer, and waterproof membrane. This approach effectively prevents water infiltration while allowing any water that does penetrate to drain away properly.

Waterproofing typically lasts for several years, but the exact lifespan depends on factors such as the quality of the waterproofing product, the surface it's applied to, and the conditions it's exposed to. Regular maintenance and inspections can help prolong the life of waterproofing.

Damp proofing and waterproofing are not the same. Damp proofing is a measure to prevent moisture from entering a building through the walls or floors, while waterproofing is a measure to prevent water from entering a building or structure. Both are important for protecting a building from damage, but they address different types of moisture.

Damp proofing is a measure used to prevent moisture from penetrating the walls and floors of a building, but it does not necessarily prevent mold growth. Proper ventilation and moisture control are also necessary to prevent mold growth.