Damp-Proofing Vs. Waterproofing

We know that Damp-proofing and waterproofing are two conditions in the basement waterproofing industry that are often use interchangeably; however, it is essential to distinguish between waterproofing and damp-proofing as they are not same. They can be correctly defined as follows:

Waterproofing is an arrangement of the surface to prevent the passage of water through the building envelope under hydrostatic pressures. It provides a continuous barrier to water penetration.

Damp-proofing is an arrangement of a surface to defy the passage of moisture caused by differences in moisture content, steam pressure and heat across the basement envelope to protect accumulation of water against the outer surfaces of the envelope (walls and floor slab).

The difference between waterproofing and damp-proofing is very significant because these treatments provide certain blockade to basement water infiltration accomplished via distinctly different methods.

Foundation Waterproofing

It involves the usage of a waterproof coating onto the external of a foundation, the purpose of which is to provide a blockade through which water cannot penetrate. Three most common waterproofing materials in current use are:

  • Tar
  • Rubber coatings; and
  • Blue-skin

Foundation Damp-proofing:

It involves the fixing of a plastic wrap, installed onto a waterproofed foundation wall. A proper casing is arranged to make easy the flow of water, in proximity to a foundation wall, to the weeping tile. Also, the casing provides a blockade to keep wet soils from being in constant contact with the exterior foundation wall surface.

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