External Wall Leakage Repair

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External wall leakage is one of the most common issues faced by homeowners. Beyond spoiling the aesthetic appearance of a house, water damage can lead to serious structural problems if left untreated.

Cracks, gaps, and holes in external walls allow rainwater and moisture to seep in, gradually weakening the wall and damaging internal materials such as timber or concrete.

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Common Causes of Wall Leakage

Several factors contribute to external wall leakage, including:

Structural cracks: Poor design, weak building materials, or foundation movement can cause cracks in walls.
Temperature changes: Expansion and contraction of building materials due to weather fluctuations often result in crack formation.
Environmental impact: Vibrations from construction, drilling, or heavy machinery nearby can worsen cracks.
Water exposure: Blocked gutters, poor drainage, and rainwater infiltration accelerate wall deterioration.

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Signs of External Wall Leakage

Watch out for these common indicators of water seepage:

Wall and ceiling cracks – caused by expansion and moisture infiltration.
Peeling or bubbling paint – moisture trapped behind walls causes dampness.
Discoloration and stains – yellowish or brown patches signal water penetration.
Mould growth – dangerous to health, leading to allergies and respiratory issues.

These issues typically appear near windows, doors, rooftops, and corners, where water exposure is highest.

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Repairing External Wall Leaks

Quick fixes such as sealants only offer temporary relief. Over time, they deteriorate under sunlight, rain, and temperature changes. For a long-term solution, professional waterproofing methods are highly recommended.

One of the most effective techniques is PU Injection Grouting. This method involves injecting a polyurethane resin into cracks or gaps. The resin expands, seals the void, and strengthens the wall structure.

Benefits include:

Permanent waterproofing solution
Fast curing time and minimal disruption
No hacking or major construction required
Environmentally safe and cost-effective

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