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Moisture barrier and waterproofing are distinctive terms that are used interchangeably in the construction industry. In this article, we will explore the differences between the two in detail.

What is Moisture Barrier?

A moisture barrier prevents water ingress by diffusion. These membranes fill the spaces of the substrate with polymer or epoxy and restrict vapors from passing through. Moisture barriers work under limitations: It does not provide adequate protection from moisture, particularly in high humid areas. These surfaces are used in construction to prevent moisture from seeping through the walls or floors and causing damage to the building or its contents.

Moisture barriers are made from a variety of materials, including plastic, foil, and asphalt-based products. They are applied as a sheet or membrane over the surface to prevent gaps or punctures. However, these sheets are not designed to withstand standing water or water under pressure. Moisture barriers are not resistant to chemicals or UV exposure.

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What is Waterproofing?

Waterproofing membranes resist hydrostatic pressure and bulk water intrusion into a building. These surfaces are made from rubber, plastic, or coated fabric materials, each with its own properties and characteristics. Waterproofing is designed to withstand prolonged exposure to moisture, chemicals, and UV radiation.

Waterproofing membranes are applied with rollers, brushes, or spray, forming a continuous, impermeable barrier over the surface. It differs from dampproofing, as the latter process resists moisture flow in a gaseous state.

Waterproofing membranes or sheets are applied on: