The Essentials of Waterproofing in Roofing

Waterproofing involves applying a waterproof membrane or coating to the roof surface to prevent water from penetrating the structure. The type of waterproofing used will depend on the type of roof and the climate, but it typically involves applying a liquid membrane, sheet membrane, or a spray-on coating.

Inadequate waterproofing can lead to several problems such as

• Water leaking into the building, which can cause damage to ceilings, walls and floors.
• Mold and mildew growth, which causes health problems and damage to building materials.
• Reduced energy efficiency as inadequate waterproofing allows heat and cold air to escape from the building.
• A decreased lifespan of the roof due to deterioration and increased maintenance costs, as the building is regularly repaired.

There are a variety of waterproofing methods that can be used, depending on the type of roof and the climate.  Popular methods include:

• Liquid-applied membranes: These are liquid-based coatings that are applied to the roof surface to create a waterproof seal.
• Sheet membranes: These are large, prefabricated sheets that are installed over the roof surface to create a watertight seal.
• Built-up roofs: These are roofs that are made up of multiple layers of materials, including a waterproof membrane, that are built up to create a watertight seal.
• Single-ply roofs: These are roofs that consist of a single layer of membrane.
  

A proper approach to waterproofing can be summarised in 3 key principles: prevention, protection, and performance. Prevention refers to the proper design and construction methods to prevent water damage. Protection involves the use of appropriate materials and techniques to protect the building from water penetration. Performance refers to the need for regular maintenance and monitoring to ensure functionality.

Waterproofing is an important part of any roofing system and there are a variety of waterproofing systems available. It is important to choose the right system for the specific needs of the building. With proper waterproofing, building owners can enjoy the benefits of a safe and dry building for many years to come!

To find the right contractor for your construction project, including waterproofing contractors, visit the ‘Find a builder’ webpage on the Master Builders KwaZulu-Natal website.

Zola Sikrweqe

Membership Manager