Concrete Repair & Waterproofing

Concrete is a highly versatile material that is widely used in almost all buildings. You can use it for flooring, walls and the building itself. Though concrete is a durable material that can last a long time, it is also prone to damage over time. This can occur due to impact damage, carbonation of the concrete or general wear and tear. Damages to the concrete surface can be dangerous to occupants of a building; bulging or dented concrete on the floor can cause trips or falls. Damaged wall or ceiling concrete can also flake and fall off, potentially injuring passersby. Furthermore, the deterioration of concrete will lead to serious structural issues for the building.

Spalling concrete is a common issue for older buildings. It is largely caused by carbonation where the steel bars embedded in the ceiling slab start to corrode, which in turn causes the concrete cover to crack and bulge. Interfloor seepage is a common occurrence that happens when a waterproofing issue trickles downwards and affects the floor below. For minor leaks, a localised repair using PU grouting can be used to troubleshoot the issue. For severe leaks, a comprehensive repair must be carried out which involves waterproofing works on the floor above.

Methods & Techniques

Spalling Concrete Repair

Spalling concrete is a concerning issue that can manifest in various forms, such as surface flaking, chipping, or deeper fragmentation, often linked to corroding steel bars within the structure. If left untreated, spalling undermines the building's aesthetic appeal and structural integrity, putting occupants and the structure at risk. There are multiple reasons behind spalling, ranging from natural degradation to more acute causes like moisture ingress or freeze-thaw cycles.

Hydro-Seal is well-equipped to address all types of spalling damages. With our seasoned expertise, we adopt a meticulous approach to identify the root causes, remove affected areas, treat corroded rebars, and finalize with a robust, high-strength mortar application.

Formwork Grouting

Formwork grouting becomes indispensable when existing concrete structures exhibit significant honeycombing or defects. This repair technique involves setting up formwork as a mould around the compromised structure. Then, a high-strength, non-shrink cementitious grout is precisely injected under pressure to address the pronounced voids and gaps within the concrete.

At Hydro-seal, our expertise in formwork grouting stands unmatched in Singapore. With a blend of advanced techniques and seasoned professionals, we're committed to restoring the integrity and durability of your concrete structures. Whether a residential property or a vast commercial building, Hydro-seal delivers exceptional results, ensuring longevity and safety.

PU Grouting

PU grouting is a specialized technique that utilizes expanding polyurethane to halt water ingress through cracks and address voids within slabs and concrete joints. The process begins with creating a pre-drilled hole on the ceiling's underside. Following this, PU grout is introduced under controlled pressure.

Once the grout material interacts with a specific accelerator, it reacts with any present moisture or water, undergoing expansion. This expansion culminates in forming a robust, closed-cell rubber, notable for its resilience even in corrosive settings.

At Hydro-Seal, we harness this advanced PU grouting technique, ensuring that buildings across Singapore remain watertight and secure. Our seasoned team promises precision and efficiency, making us your trusted partner in comprehensive waterproofing solutions.