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Home6 Simple Steps to Waterproofing Exterior Walls
Jan 3, 2025
Exterior walls are constantly exposed to harsh weather conditions, such as rain, wind, and extreme sunlight. Without proper waterproofing, water can seep into your walls, leading to mould, mildew, cracks, and structural damage. This is why exterior wall waterproofing is one of the most effective ways, as opposed to relying solely on interior repairs or temporary fixes, to safeguard your home from damage. It prevents leaks and dampness and enhances the overall durability of your structure.
Whether you’re looking to protect a new build or maintain an older home, external wall waterproofing ensures your home remains safe for the long term. Here’s a simple guide to help you understand the essential steps and methods for waterproofing exterior walls effectively.
Step 1: Inspect the Walls for Damage
Begin by thoroughly inspecting your exterior walls for cracks, gaps, or loose plaster. Any existing damage can compromise the effectiveness of your waterproofing efforts. Mark these areas for repair before proceeding.
Step 2: Clean the Surface
A clean surface is essential for proper adhesion of waterproofing materials. Use a pressure washer or scrub the walls to remove dirt, dust, mould, and peeling paint. Allow the walls to dry completely before moving to the next step.
Step 3: Repair Cracks and Gaps
Seal any cracks or gaps using a high-quality crack filler. For larger damages, you may need to use a cement-based repair material. Ensure that the surface is smooth and even after repairs. Use high-quality crack repair solutions like Trubuild.
Step 4: Apply a Waterproof Primer
Primers act as a base coat and improve the adhesion of waterproofing solutions. Choose a primer that is specifically designed for exterior waterproofing. Apply it evenly and allow it to dry completely as per the manufacturer’s instructions.
Step 5: Use a Waterproofing Membrane or Paint
Select a waterproofing solution that suits your needs—use a liquid waterproofing membrane for surfaces requiring flexibility and durability, or opt for specialised waterproof paint for aesthetic appeal and moderate water resistance. These materials create a protective barrier against water ingress. Apply at least two coats for optimal protection, ensuring even coverage.
Step 6: Maintain Proper Drainage Systems
Waterproofing exterior walls without addressing water drainage is incomplete because poor drainage allows water to accumulate and exert hydrostatic pressure, leading to leaks and damage. Effective drainage ensures water is directed away from the walls, preventing the inefficiency of the waterproofing system. Regular cleaning of drainage systems is also essential to prevent blockages and maintain functionality.
Wall Waterproofing Methods to Consider
- Cementitious Waterproofing: Ideal for surfaces exposed to water, such as balconies and terraces.
- Liquid Waterproofing Membrane: Offers flexibility and excellent adhesion to walls.
- Bituminous Coating: Effective for damp-proofing and sealing surfaces.
- Exterior Waterproof Paint: Adds a layer of protection and enhances the appearance of walls.
Choose Long-Lasting Exterior Waterproofing Solutions
It is also important to use high-quality materials for better durability such as Astral Trubuild Walltect Topcoat and Basecoat. They are an excellent choice for exterior wall waterproofing due to their superior quality and long-lasting protection.
- The Walltect Basecoat acts as a strong, flexible layer that seals cracks, providing a solid foundation for waterproofing.
- The Walltect Topcoat enhances durability with its weather-resistant and UV-protective properties, offering an additional layer of defence against moisture and harsh environmental conditions.
External wall waterproofing is a smart decision that protects your home from the adverse effects of water damage. By following these simple steps and choosing the right wall waterproofing methods, you can ensure that your walls remain strong, dry, and beautiful for years to come.