Construction Joints
Where structures move, we make sure they stay watertight
When working below ground, it’s not just water that threatens a structure. Gases such as radon, methane, and carbon dioxide can accumulate beneath buildings, posing serious health and safety risks. Effective protection requires a design that considers both — waterproofing and ground gas protection — from the earliest stage of the project.
Construction & Expansion Joints
An expansion (or movement) joint is a deliberate gap between two sections of concrete or masonry. It allows the structure to absorb movement caused by temperature changes, shrinkage, ground settlement, or load stress.
Without these joints, concrete slabs and walls would crack under pressure as they naturally expand and contract. Well-placed and properly formed joints prevent these stresses from transferring through the structure, maintaining both its strength and appearance.
Waterproofing Expansion Joints
An expansion (or movement) joint is a deliberate gap between two sections of concrete or masonry. It allows the structure to absorb movement caused by temperature changes, shrinkage, ground settlement, or load stress.
Without these joints, concrete slabs and walls would crack under pressure as they naturally expand and contract.
Well-placed and properly formed joints prevent these stresses from transferring through the structure, maintaining both its strength and appearance.
Concrete Repairs
Over time, concrete structures can develop cracks, voids, or areas of deterioration caused by movement, water ingress, corrosion of reinforcement, or incorrect detailing around joints. These defects not only affect the appearance of a structure but can also compromise its strength and waterproof integrity if left untreated.
Our repair process begins with a detailed inspection to identify the source and extent of damage — whether from thermal movement, failed joints, carbonation, or chloride attack. Once assessed, we apply specialist repair techniques using high-performance mortars, epoxy resins, and injection systems designed for structural restoration and long-term durability.
Each repair is carried out in strict accordance with BS EN 1504 standards for concrete protection and repair. By restoring both the structure and its waterproofing continuity, we ensure the building remains fully protected against future water penetration and structural weakness.
Design & Installation
The best time to plan joint protection is at the design stage of a project. However, effective solutions can also be retrofitted to remediate failing joints in existing structures.
Our CSSW-qualified specialists assess the expected structural movement, hydrostatic pressure, and surrounding materials to recommend the most durable, low-maintenance waterproofing approach for each joint detail.