Structural Waterproofing covers a number of skills and areas. BOSA have been a leading nationwide specialist in this area for over 20 years. We have a dedicated Waterproofing Manager who can assist you in your project, from offering advice and solutions through to ensuring that works are carried out to the highest standards. Working with leading manufacturers such as Flexcrete, Sika, RIW, Fosroc, Mapei and many more, we are available to carry out projects offering a range of warranties.
External waterproofing system (Type A)
This involves the application of a waterproofing barrier applied on the external surfaces that are exposed to ground water (positive side). External systems can be created through various methods such as membranes, mortars and coatings.
Internally applied waterproofing system (Type A)
A waterproof barrier is applied on the internal surfaces of the structure (negative side). These are most commonly used on refurbishment projects. These systems can produce waterproof grades 1-3 depending on your requirements.
Internally applied waterproofing system (Type C)
This system doesn’t stop water ingress, but instead directs penetrating water into a drainage system and a collection sump before using a pump to discharge water from the building. When selecting this system it is important to understand that the system requires regular maintenance, so access to the building will be required throughout the lifetime of the structure.
About Leak Sealing & Injection
Leaks within a building can not only damage concrete structures, but can also lead to the corrosion of the steel reinforcement bars within concrete reducing the lifespan of the structure.
Leaks or cracks can quickly and cost effectively be sealed and waterproofed by injection method. This type of method can be used on concrete, masonry and natural stone structures, and can be used to repair and seal cracks, voids and joints. The injection system can also be used to increase or restore the integrity and load bearing capacity of a structure.