The role of waterproofing is to protect a building's visual and structural integrity. It achieves this by forming an impervious membrane that prevents water entering or escaping from wet areas to dry areas.
In order to effectively fulfil this role a membrane must possess the following qualities:
- The membrane must be impermeable to prevent the passage of water.
- Flexibility - membranes need to accommodate any normal movement that may occur in building structures.
- The membrane must be durable, it must be able to retain it's integrity over a long period of time.
- The membrane must lend itself to design details in a building. It must be suitable for each specific application.
- The membrane must be suitable to withstand environmental and climatic conditions.