In humid climates and weather conditions, homes and buildings are often affected by moisture, which can lead to mould growth, damp patches, and structural damage over time.

The moisture can lead to water seepage, causing damage to both the property and any nearby equipment. In some cases, this can even pose health risks.

This is where wall waterproofing becomes essential. It helps prevent leakage, dampness, and long-term deterioration of walls. It not only safeguards your property but also saves time, money, and effort in future repairs.

In this comprehensive guide to waterproofing for walls, you can better understand waterproofing.

What Is Wall Waterproofing?

Waterproofing is a technique for preventing damage to interior or exterior walls. It uses special materials that prevent water from seeping through. 

In this process, the cracks and gaps are filled with the material that prevents moisture absorption in walls, roofs, and surfaces and works as a safeguard. 

Ideally, waterproofing should be taken care of when the building is still under construction. It’s a really important step because it keeps the structure strong, prevents issues like mould growth, and helps avoid major repairs later on. Plus, keeping moisture out helps reduce health risks due to mould and is a cost-effective solution.

Methods Of Wall Waterproofing

There are many methods used for wall waterproofing that prevent moisture and seepage in buildings. Not all methods are effective for both the exterior and interior sides of the walls. Here you can get an idea of which techniques are used for waterproofing the external and internal walls.

1. Cementitious Coating Waterproofing

The cementitious coating waterproofing method is used for both the exterior and interior parts of the wall. In this method, a cement-based thick compound is coated directly on the walls. 

The thickness of the waterproof coating compound prevents water from seeping into the walls. It works properly in any weather conditions.

2. Liquid Waterproofing Membrane

Liquid waterproofing membrane is mainly used for the external part of the walls, but depending on the situation, it can also be applied to the inside of the walls. 

In this process, a liquid waterproofing material is applied in two layers to form a protective layer. Liquid membranes offer better flexibility and are generally more reliable and durable than cementitious coatings.

3. Bituminous Membrane Layering

Bituminous membrane layering is commonly used for waterproofing solutions for roofs, terraces, and foundations.  

In some cases, it can also be applied to external vertical surfaces like basement walls. It involves sticking a sheet made of fibreglass or polyester, coated with bitumen, onto the surface to block moisture from seeping in.

Bituminous materials are heat-sensitive materials that can easily melt at high temperatures.

4. Waterproof Membranes

Waterproofing membrane is used for both exterior and interior walls. It can be made with membrane plastic, rubber, or coated fabric materials. These layers help protect the wall from liquid seepage.

5. Drainage Boards

Drainage boards are a specialised method to prevent moisture and seepage into the walls. It can be used for the internal and external parts of the walls. 

The boards are installed in the foundations or basements of walls. Instead of letting water build up, the boards guide the water down to a drainage system, like a pipe or a sump pump, which then moves the water away from the building. This helps keep the walls dry and protects the structure from water damage.

6. Integral Waterproofing

Integral waterproofing is one of the most reliable and cost-effective methods. It can be used for the internal and external sides of walls. In this process, a dry or liquid chemical is mixed with the concrete to make a durable mixture. 

Integral waterproofing features a self-filling ability for small cracks or pits on walls. It is also an eco-friendly and cost-effective solution for wall waterproofing.

7. Acrylic Waterproofing

Acrylic waterproofing is an effective method for wall waterproofing. It is commonly used for the exterior parts of the walls. It is made with a mixture of compounds, such as acrylic polymer, fillers, additives, water, pigments, and preservatives.

It acts as a strong sealant on wall surfaces, providing long-lasting protection. Acrylic waterproofing not only prevents water seepage but also guards against chemicals and harmful UV rays. Plus, it’s a cost-effective solution that helps extend the life of your walls.

8. Polyurethane Waterproofing

Polyurethane waterproofing is mostly used during the construction phase of a building. It can be used for the external and internal parts of the walls. It saves the building from water, moisture, and ultraviolet rays.

Advantages Of Wall Waterproofing

• Waterproofing prevents the cracking and absorption of water in walls.
• It improves the lifespan of the walls by protecting them from water damage.
• It prevents seepage in walls, roofs, and ceilings, keeping your structure dry.
• It prevents electrical equipment from being damaged by moisture or dampness.
• Increase the value of the property by preventing corrosion.
• Reduces health risks by preventing mould growth.

Disadvantages Of Wall Waterproofing

• Cementation waterproofing is unable to fill the crack properly, which can cause repeated leaks.
• Due to its black colour, bitumen-based layering melts with summer heat, reducing its lifespan.
• High initial costs are due to the fact that specialised products, like sealants and membranes, are costly.
• If the waterproofing walls process is not implemented properly, then it cannot be an effective solution for water absorption.
• Waterproofing products are affected by the environment. Some waterproofing materials contain volatile organic compounds that can contaminate air and groundwater.

Conclusion

Waterproofing is a technique to prevent homes and buildings from seepage and leakage.  However, it is different for the exterior and interior walls.
You need to consider this factor and also identify the cause of seepage, the types of material used in the particular building, the budget, durability, and compatibility. You can also take suggestions from an expert.

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