How do you repair a spalled concrete surface?

Repairing spalled concrete involves a strictly regulated process, typically governed by BS EN 1504 standards. First, the damaged concrete is broken out back to a sound substrate, ensuring the reinforcement is fully exposed and cleaned (often via grit blasting) to remove rust. A primer or bonding bridge is applied to the steel to prevent future corrosion. We then reinstate the profile using a polymer-modified repair mortar, which offers superior adhesion and waterproofing properties compared to standard concrete. Finally, a fairing coat or anti-carbonation coating is applied to protect the entire surface from future moisture and CO2 ingress.

What is a 'Grade 3' basement environment?

Defined by BS 8102, a Grade 3 environment is a 'dry environment' with no water ingress and humidity control, suitable for residential living, offices, or leisure. To achieve Grade 3, the standard typically recommends a 'combined protection' approach—using two forms of waterproofing (e.g., Type A Tanking + Type C Cavity Drain) to provide a failsafe. MPS specializes in designing systems to meet this rigorous habitable standard.

How long does structural waterproofing last?

The lifespan of waterproofing depends on the system. Cementitious tanking and waterproof concrete can last the lifetime of the structure if not subjected to movement cracking. Cavity drain membranes (HDPE) also last decades but the mechanical pumps require servicing every 6-12 months. Resin injections are permanent. MPS provides long-term warranties (often 10 years) on our waterproofing installations, backed by our manufacturer partnerships.

What is the difference between PU and Epoxy injection?

The main difference is purpose: PU (Polyurethane) is for *waterproofing*, while Epoxy is for *structural repair*. PU is flexible and expands to stop leaks, allowing for slight movement in the crack without tearing. Epoxy is rigid and has incredibly high bond strength; it is used to 'glue' concrete back together to restore its structural integrity. You would not use epoxy on a live leaking crack (it won't bond), and you wouldn't use PU to structurally restrengthen a column.

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Waterproofing Structural Integrity Standards

What is BS 8102:2022?

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What is BS 8102:2022?

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BS 8102:2022 is the British Standard 'Code of practice for the protection of below ground structures against water ingress.' It categorizes waterproofing into three types: Type A (Barrier/Tanking), Type B (Integral/Waterproof Concrete), and Type C (Drained Protection). The 2022 update places a stronger emphasis on 'maintainability' and designing for defects. MPS Concrete designs all basement waterproofing strategies in strict accordance with BS 8102:2022 to ensure insurability and long-term dryness.

Topics: Waterproofing Structural Integrity Standards

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How to Seal Pipes & Services Through Concrete

Our complete technical guide covers penetration sealing systems, fire rating requirements, hydrophobic and intumescent materials, and installation details for pipes, cables and ducts through concrete walls and floors.

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What is BS 8102:2022?

What is BS 8102:2022?

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Related Questions

How do you repair a spalled concrete surface?

What is a 'Grade 3' basement environment?

How long does structural waterproofing last?

What is the difference between PU and Epoxy injection?

What is a Grade 2 basement environment?

How to Seal Pipes & Services Through Concrete

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What is BS 8102:2022?

What is BS 8102:2022?

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Related Questions

How do you repair a spalled concrete surface?

What is a 'Grade 3' basement environment?

How long does structural waterproofing last?

What is the difference between PU and Epoxy injection?

What is a Grade 2 basement environment?

How to Seal Pipes & Services Through Concrete

Need Professional Assistance?

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