When to Call a Remedial Builder: Addressing Building Defects & Concrete Cancer

When to Call a Remedial Builder: Addressing Building Defects & Concrete Cancer

For property owners and managers, the appearance of a crack or a patch of bubbling paint can be a sign of a deeper, more serious problem. Unlike general builders who construct new properties, remedial builders are specialists in identifying, diagnosing, and repairing defects in existing structures. Their expertise is crucial for addressing problems that compromise a building's safety, value, and longevity.

This guide explains the key role of a remedial builder and focuses on a common and dangerous defect known as "concrete cancer."

What Does a Remedial Builder Do?

A remedial builder's work is focused on restoration and defect rectification. Their services often include:

• Structural Repairs: Fixing issues with foundations, walls, and load-bearing elements.
• Waterproofing: Diagnosing and repairing leaks in balconies, roofs, and basements.
• Concrete Repair: Addressing issues like concrete spalling and "cancer."
• Facade Restoration: Repairing and maintaining the external surfaces of a building.

What is Concrete Cancer?

Concrete cancer, also known as concrete spalling, occurs when the steel reinforcement bars inside a concrete slab begin to rust. This corrosion happens when moisture, oxygen, or chlorides (especially in coastal areas) penetrate the concrete. As the steel rusts, it expands, putting pressure on the surrounding concrete and causing it to crack, crumble, and flake away.

Common signs of concrete cancer include:

• Cracks in the concrete, especially on balconies, columns, or beams.
• Bubbling, flaking, or crumbling concrete.
• Visible rust stains seeping from the concrete surface.
• Chunks of concrete that have broken away, exposing the steel reinforcement.

How Do Remedial Builders Fix Concrete Cancer?

A professional remedial builder follows a precise multi-step process to ensure a lasting repair:

1. Assessment: The builder first assesses the extent and cause of the damage, often in consultation with a structural engineer.
2. Removal: The compromised concrete is carefully removed until a sound, stable surface is reached.
3. Treatment: The exposed steel reinforcement is meticulously cleaned, and a rust inhibitor or protective coating is applied to prevent future corrosion. In severe cases, the steel may be replaced.
4. Reinstatement: The area is repaired with a specialised, high-strength mortar that bonds securely with the existing concrete.
5. Protection: A waterproof coating or sealant is applied to the surface to prevent moisture from reaching the repaired area.

Need to Address a Building Defect?

Don't let a small crack turn into a major structural problem. Find a trusted expert on Build-Surety who can provide a professional diagnosis and a safe, lasting repair for your building's structural and remedial issues.

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