Water Coming Through Brick Wall When It Rains Uk

Water Coming Through Brick Wall When It Rains UK: Causes and Solutions

Rain penetrating a brick wall is a common problem for UK homeowners, leading to damp walls, mould growth, and potential structural damage. This article explores the common causes of this issue and offers practical solutions to help you resolve it and protect your property. Understanding the source of the leak is crucial for effective repair.

Common Causes of Water Ingress Through Brick Walls:

• Faulty Pointing: Deteriorated or missing mortar (pointing) between bricks is a major culprit. Over time, mortar erodes due to weathering, frost damage, or poor initial application. This creates gaps allowing rainwater to penetrate. This is particularly prevalent in older properties.

• Cracked Bricks: Cracks in the bricks themselves, whether caused by settlement, frost damage, or simply age, provide direct pathways for water to enter. These cracks can be subtle and require careful inspection.

• Damaged or Missing Flashing: Flashing is a waterproof membrane used around windows, doors, and roof junctions to prevent water penetration. Damaged or missing flashing is a significant source of leaks, especially at vulnerable points like windowsills.

• Blocked Gutters and Downpipes: Overfull gutters and blocked downpipes can cause rainwater to overflow, leading to water running down the walls and seeping through any imperfections in the brickwork. Regular gutter cleaning is essential.

• Rising Damp: While different from rainwater penetration, rising damp can exacerbate the problem. Dampness from the ground can weaken the mortar and bricks, making them more susceptible to water ingress from rain.

Identifying the Source of the Leak:

Before attempting any repairs, it's crucial to pinpoint the exact source of the leak. This involves:

• Visual Inspection: Carefully examine the exterior brickwork for cracks, missing pointing, and damaged flashing. Look for signs of water staining on the inside walls.

• Water Testing (during rainfall): Observe the wall during rainfall to identify where the water is entering. Use a hosepipe to simulate rainfall in areas you suspect are causing the problem.

• Internal Inspection: Check for signs of dampness and mould inside the house. This can help you narrow down the affected area on the exterior.

Solutions to Water Ingress Through Brick Walls:

The solution depends on the cause of the leak. Common repair methods include:

• Repointing: This involves removing deteriorated mortar and replacing it with new, high-quality mortar. It's a relatively straightforward repair for minor issues but may require professional assistance for extensive damage.

• Brick Repair: Cracked bricks may need to be replaced individually or in sections. This is a more involved process often requiring the skills of a bricklayer.

• Flashing Repair/Replacement: Damaged or missing flashing needs to be repaired or replaced to prevent water from entering around window frames and other vulnerable points.

• Gutter and Downpipe Cleaning: Regular cleaning and maintenance of gutters and downpipes are crucial to prevent water overflow and potential damage to the walls.

• Damp Proof Course (DPC) Injection: If rising damp is contributing to the problem, chemical DPC injection can be an effective solution to prevent moisture from rising through the walls.

When to Call a Professional:

While some minor repairs like repointing might be tackled by a DIY enthusiast, larger problems involving extensive brickwork damage, rising damp, or complex flashing repairs should be left to experienced professionals. A qualified bricklayer or building surveyor can properly diagnose the issue and provide a lasting solution. Ignoring water ingress can lead to significant structural damage and costly repairs in the long run. Therefore, early intervention is key.