Shared Walls Shouldn’t Mean Shared Leaks – Here’s the Fix!

If you’ve noticed damp patches, peeling paint, or a musty smell on the wall shared with your neighbour, you’re probably dealing with water seepage. This is a common issue in homes and apartments where two properties share a boundary wall. The water can come from leaky plumbing, rainwater infiltration, or poor waterproofing on either side of the wall.

Many homeowners rely on roof waterproofing to protect upper surfaces from excessive rainfall and moisture.

Since this wall is jointly owned, fixing the issue may need a discussion with your neighbour. But don’t worry! We’re here to break down the waterproofing process in simple steps so you’ll know everything about how to stop water leakage from walls.

How to Stop Water Leakage from Wall Shared Between Two Properties

Step 1: Identify the Source of Water Seepage

Before applying any wall waterproofing solution, you need to find out where the water is coming from. Here are some common causes:

• Leaky Pipes: Check if there are any hidden plumbing leaks in your home or your neighbour’s property.
• Rising Damp: If the lower part of the wall is wet, groundwater might be seeping up through the foundation.
• Rainwater Seepage: If the issue worsens after rain, the external walls might not be waterproofed properly.
• Cracks in the Wall: Small cracks allow water to pass through, leading to seepage problems over time.

For floors in particular, applying a epoxy floor coating can help create a waterproof, long-lasting surface that resists water damage.

Step 2: Discuss the Issue with Your Neighbour

Since this is a shared wall, it’s best to talk to your neighbour before starting repairs. Explain the issue and suggest a joint solution. If they’re experiencing the same problem, they’ll likely agree to share the cost of fixing it.

Step 3: Choose the Right Waterproofing Solution

There are different types of waterproofing methods, depending on the severity of the leakage. Here are some options:

1. Interior Wall Waterproofing

If the seepage is minor, you can use wall waterproofing chemicals like waterproof primers and coatings inside your home. These act as a temporary fix but don’t address the root cause.

2. Exterior Wall Waterproofing

The best way to stop water leakage from the wall is to waterproof the exterior surface. This involves applying a waterproof coating on the outer wall, which blocks moisture from seeping in.

3. Injection Grouting

For deeper cracks, injection grouting is a great solution. This process involves injecting waterproofing chemicals into the cracks to seal them permanently.

4. Cementitious Waterproofing

This is one of the most affordable waterproofing solutions. A special cement-based waterproof coating is applied to seal porous surfaces and stop water seepage.

5. Polyurethane or Acrylic Waterproof Coatings

These coatings provide a flexible, long-lasting barrier against moisture. Polyurethane waterproof coatings are best for high-moisture areas, while acrylic waterproofing is an eco-friendly option for walls exposed to sunlight and rain. For added flexibility and durability, PU-based waterproofing is another highly effective solution to keep water from penetrating surfaces.

Step 4: Repair Any Plumbing Issues

If the water leakage is caused by faulty pipes, no amount of waterproofing will solve the problem unless the plumbing issues are fixed first.

• Call a licensed plumber to check for leaks and repair damaged pipes.
• Seal any gaps around water pipes passing through the shared wall.
• Ensure proper drainage so that excess water doesn’t accumulate near the walls.

Tip: If you’re unsure, contact Sunanda Global to get in touch with professional plumbers in Pune, Mumbai, Chennai or wherever you are, to inspect the area.

Step 5: Apply a Protective Waterproofing Layer

Once the plumbing is fixed, it’s time to apply a waterproofing solution to the wall. Here’s how it’s done:

1. Clean the wall – Remove dirt, loose paint, and mould using a wire brush.
2. Fill cracks and gaps – Use a polymer-based crack filler to seal cracks before applying waterproofing chemicals.
3. Apply a waterproof primer – This helps the waterproofing coating adhere properly to the surface.
4. Apply the waterproofing coating – Use two or more layers of a waterproofing material for long-lasting protection.
5. Let it cure properly – The coating needs at least 24-48 hours to dry completely.

Step 6: Prevent Future Water Seepage

Once your wall waterproofing is done, here’s how to prevent future water seepage:

• Maintain proper drainage – Ensure that rainwater drains away from your building.
• Repaint with waterproof paint – Use water-resistant exterior paint to protect walls from moisture.
• Inspect your home regularly – Check for cracks or signs of dampness every few months.
• Fix leaks immediately – Don’t ignore small leaks; they can become major issues over time.

Opting for the best waterproofing chemicals in India can ensure a stronger, longer-lasting defense against recurring moisture problems.

How to Stop Water Leakage from Wall with Sunanda Global

At Sunanda Global, we understand that water seepage in a shared wall can be frustrating. That’s why we provide advanced waterproofing solutions designed to permanently stop leaks and protect your home. 

Our Best Waterproofing Products to Stop Water Leakage from Walls

1) POLYALK WP – Polymeric Waterproofing for Durable Sealing

A high-flexural-strength polymeric waterproofing coating ideal for moist conditions.

• Extraordinary adhesion to concrete
• Alkaline and fully compatible with concrete
• Prevents carbonation for long-term durability
• Can be applied in damp conditions

2) SUNKOTE WP+ – High-Performance Acrylic Waterproof Coating

A single-component, UV-resistant, elastomeric, high-build waterproof coating.

• Thick, elastic, and resilient membrane system
• Withstands cracks up to 2 mm and accommodates thermal movements
• High tensile strength, tear resistance, and strong adhesion
• Non-toxic and breathable membrane for concrete surfaces

3) SUNPLEX – Waterproof Admixture for Injection Grouting

A shrinkage-compensating waterproof admixture for plasters and injection grouting.

• Becomes an integral part of concrete for lasting protection
• Self-heals hairline cracks, preventing future leakage
• Reactivates with moisture, even years later
• Withstands hydrostatic pressure up to 160

Why Choose Sunanda Global?

With decades of experience, we offer expert guidance and high-quality wall waterproofing chemicals to ensure long-lasting protection. Our waterproofing process is backed by science, ensuring that moisture doesn’t return.

As the best waterproofing company, we prioritize durability, efficiency, and affordability in every project. Our skilled waterproofing contractors across India are equipped with the latest materials and techniques to provide hassle-free, effective waterproofing services.

Don’t wait until the problem worsens; contact Sunanda Global today for secure and professional waterproofing solutions!