1. Drilling and inserting of polyurethane injection ports
Firstly, Vroof waterproofing specialists will first drill holes into the leakage areas, usually cracks and voids and insert and tighten a metal injection port into the cored hole.
2. Protection of work areas
In addition, polyurethane injection is a non-invasive method of repair and is relatively clean. However there may be some dust and spillage of the grout material during the work itself. Hence proper protection using plastic sheets and cloth is very important.
3. Using a high pressure grouting machine
After that, Vroof waterproofing specialist will use a high pressure grouting machine to inject the polyurethane grout into the concrete via the injection ports. Each polyurethane injection port must be injected individually twice to ensure properly coverage of the grout material.
4. Removal of polyurethane injection ports & sealing up
After the grouting process has ended and grout has dried, the polyurethane injection ports must all be removed. Once the polyurethane injection ports have been removed, it is important to seal up the cored holes with waterproof cement compound.
5. Ensure no seepage
Lastly, check after check after check. Ensure that no seepage on affected damaged area.