Waterproofing is the process of making a structure or building water-resistant. Waterproofing your building protects its structural integrity, preventing mould, rust and damp from forming and increasing its value. In this blog post, we will take you through the different methods and products used in waterproofing.
Cementitious coating waterproofing
This is the easiest way to waterproof and is mostly used internally in bathrooms or toilets. A cementitious coat consisting of sand, chemicals and silica-based substances is mixed with lime, causing a hydration reaction, which creates a waterproof seal. You can also add an acrylic additive for a more durable coating. Cementitious products are easily accessible and are straightforward to apply.
Polyurethane liquid membrane waterproofing
This is the most expensive method, but a polyurethane liquid membrane offers more flexibility. It is mostly used to waterproof flat roof areas that are exposed to harsh weather conditions, reducing the water absorbency of concrete by hardening its top surface. Although this product offers seamless results, it is hazardous and can cause adverse health effects if not handled with care.
Liquid waterproofing membrane
This is a thin coating consisting of one primer coat and two topcoats, which are applied using a trowel, spray or roller. It cures into a rubbery coating, but its durability depends on the manufacturer’s polymer type. Liquid membrane waterproofing offers more flexibility compared to products such as cementitious coating.
Bituminous membrane waterproofing
Bituminous coatings are used to waterproof low-sloped roofs and come in two different types: self-adhesive membrane and torch-on membrane. Bituminous membranes have a thickness of 2mm to 4mm, which allows them to offer an elongation of 150% to seal all cracks. Bituminous coating waterproof Also referred to as asphalt coating, a bituminous coating is an excellent protective and waterproofing coating agent, making it ideal for concrete foundations. When exposed to sunlight, the coating can become brittle if it has not been treated with more flexible products such as polyurethane.