5 Common Types of Waterproofing Systems Applied in the Construction Industry

Engineer at a location site

In the construction industry, various methods for waterproofing a building or structure are used. These depend on certain conditions and on the area the procedure is being applied to.

In Australia, Waterproofing Direct explains that waterproofing is necessary for structures and buildings, specifically for the following areas: walls, basement, kitchens and bathrooms, decks and balconies, roof terraces, green roofs, swimming pools, and water tanks.

Common Waterproofing Methods in Construction

  • Cementitious Waterproofing – The easiest method, this is usually applied in toilets and other internal wet areas. Materials are easy to blend and apply and are easily available from masonry product suppliers.
  • Liquid Waterproofing Membrane – A thin coat of a primer coat and two layers of top coats are often applied using a roller, spray, or trowel. The liquid is cured into a rubbery coat on the wall. This system is more flexible than the cementitious waterproofing method.
  • Bituminous Coating – A flexible protective coat is used for waterproofing based on a specific polymerization grade and formulation. The polymer grade and fibre reinforcement determine its level of flexibility. It’s a good waterproofing agent on concrete foundations. Many call it as asphalt coating.
  • Bituminous Membrane – The method is commonly used for roofs with low slopes. It uses torch-on and self-adhesive membranes. The torch-on type comes with covered and exposed varieties. Self-adhesives, on the other hand, have a low shelf life because the membrane’s bonding properties reduce over time.
  • Polyurethane Liquid Membrane – The method is ideally for flat roofs exposed to different elements. It’s an expensive waterproofing method, but offers greater flexibility. Polyurethane is quite sensitive to existing moisture content, which should be evaluated prior to application to avoid de-bonding or peeling of membranes in the future.
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To sum everything up, there are different types of waterproofing methods commonly used in the construction industry. Understanding each method will help you determine which one will suit your particular needs.

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