Damp proofing vs waterproofing: Main differences

To prevent structural damage due to moisture or water penetration, builders and homeowners rely on dampproofing and waterproofing techniques to make buildings impervious to water vapor or liquid water.

While the terms are sometimes used interchangeably, there are distinct differences between them.

What is the difference between damp proofing and waterproofing?

The main difference between damp proofing and waterproofing is the degree of protection these solutions provide against liquid water penetration or hydrostatic pressure. Damp-proofing techniques keep out moisture, while waterproofing solutions keep out moisture and liquid water.

Dampproofing solutions can successfully prevent moisture from entering a building or structure. However, they can’t prevent liquid water penetration.

The aim is to prevent the accumulation of dampness, which in time can lead to structural damage, unpleasant odors, mold growth, and health hazards.

Damp proofing solutions are typically used in areas with high humidity such as crawl spaces, walls, and floors.

Waterproofing is a more complex solution that provides complete protection against liquid water penetration.

Waterproofing solutions are used in areas that are exposed to significant amounts of liquid water over a long period of time, such as basements, foundations, swimming pools, and roofs.

Why is waterproofing preferred over damp proofing?

Waterproofing is preferred over dampproofing because it provides a higher level of protection against water penetration.

Dampproofing solutions cannot withstand prolonged exposure to liquid water. They can’t seal larger cracks or holes in the structure either.

Waterproofing is a 2-in-1 solution: it can keep out both moisture and liquid water.

Waterproofing is typically more expensive than dampproofing.

The choice between damp proofing and waterproofing depends on the characteristics of the building, soil conditions, and the level of moisture the building is exposed to on a daily basis.

If you’re unsure about whether to choose damp proofing or waterproofing, talk to a builder or construction professional. They can provide you with expert advice based on the characteristics of your building and moisture exposure conditions.