A Waterproofing Membrane consists of single or multiple layers of a continuous, watertight material or substance that is laid over a surface to prevent the passage of water. These can be applied both internally or externally, with interior Membranes being bonded to other materials, often directly to a surface or to a hard secondary surface, with the layers allowing water to penetrate one half of the wall but blocking its penetration to the other half. Exterior Membranes are designed to be significantly stronger and placed directly to the outside surface of a structure, preventing any water penetration and often including UV resistant properties.
Waterproof Membranes can be categorised into two main types:
Liquid Applied Membranes
These types of Membranes are provided in liquid form and can be spray or brush applied to a surface. This application process is very quick and often preferred to other forms of application as they are joint-free. Desired thickness is controlled dependant on the surface in question and therefore the degree of water protection required.
Liquid Applied Membranes are typically provided when ensuring Structural Waterproofing in:
- Flat Roofs
- Balconies & Walkways
- Car Park Decks
- Podium Decks
- Bridge Decks
These types of Membranes are provided in the form of rolls and are typically applied with tar-based adhesives. Sheet Membranes are strong, flexible, tear-resistant and elastic, ensuring they can stretch to cover cracks and be able to take any shape they are laid over, capable of being laid up and over walls and other complex construction features.
Sheet Membranes are typically provided when ensuring Structural Waterproofing in:
- Flat Roofs (Reservoirs)
- Bridge Decks
- Walls (Retaining)