Danie Reitsma • April 24, 2025
The Right Way to Waterproof Your Balcony or Concrete Slab

Waterproofing is one of the most critical steps in ensuring the longevity and durability of your balcony or concrete slab. Without proper waterproofing, water can seep into the concrete, leading to cracks, weakening of the structure, and costly repairs down the line. At Home Renovations and Repairs, we specialise in a wide range of waterproofing methods to protect your property from water damage.


Why Waterproofing is Essential


Balconies and concrete slabs are constantly exposed to the elements, including rain, sun, and fluctuating temperatures. Over time, these factors can compromise the integrity of the concrete, leading to cracks, corrosion, and eventual structural failure. Proper waterproofing not only protects against these issues but also enhances the value of your property, reduces maintenance costs, and extends the lifespan of your building.

Waterproof Your concrete

Common Waterproofing Methods for Concrete Slabs and Balconies


  1. Torch-On Membrane Waterproofing: This is one of the most effective and widely used methods for waterproofing concrete slabs, balconies, retaining walls, and underground structures. Torch-on membrane waterproofing involves the use of a polymer bitumen membrane that is heat fused to a primed surface using a gas torch. Once applied, it is finished off with aluminium paint to protect against UV degradation and provide a sleek, decorative finish.


Key Benefits:

  • Highly durable and long-lasting
  • Effective in extreme weather conditions
  • Provides a strong barrier against water penetration


Torch-On Membrane Waterproofing
  1. Liquid Rubber Waterproofing: Liquid rubber is a versatile, flexible waterproofing solution that can be applied to almost any surface, including flat concrete roofs and balconies. It forms a seamless, watertight membrane that is highly resistant to UV rays, extreme temperatures, and physical wear.


Key Benefits:

  • Seamless application reduces the risk of leaks
  • Resistant to UV damage and harsh weather conditions
  • Eco-friendly and non-toxic
Liquid Rubber Waterproofing

Steps for Proper Waterproofing of Concrete Slabs and Balconies


To ensure a long-lasting, leak-proof balcony or concrete slab, it is important to follow the correct steps:


  1. Surface Preparation The first step in any waterproofing project is to thoroughly clean and prepare the surface. This includes removing any dirt, dust, or loose debris, as well as repairing any cracks or damage to the concrete.
  2. Priming A high-quality primer is applied to the surface to enhance adhesion and improve the overall performance of the waterproofing membrane.
  3. Application of Waterproofing Membrane For torch-on membrane systems, the membrane is carefully heat fused to the primed surface, ensuring full coverage and a strong bond. For liquid rubber systems, the membrane is applied in layers, allowing each layer to cure before the next is added.
  4. Finishing Once the membrane has been applied, it is finished with a protective coating, such as aluminium paint for torch-on membranes, to enhance UV resistance and add a decorative touch.
  5. Quality Inspection Finally, a thorough inspection is conducted to ensure that the waterproofing system has been correctly installed and that there are no weak points where leaks could develop.


Choosing the Right Waterproofing Solution


Selecting the right waterproofing method depends on a variety of factors, including the location, climate, and specific requirements of the structure. Torch-on membrane systems are ideal for heavy-duty applications and areas with extreme weather exposure, while liquid rubber is better suited for more flexible and less demanding applications.

Waterproofing

Final Thoughts


Waterproofing is a critical component in the long-term protection of your balcony or concrete slab. At Home Renovations and Repairs, we have over 40 years of experience in the construction and waterproofing industry, ensuring that every project is completed to the highest standards. From residential balconies to large commercial concrete slabs, we provide tailored waterproofing solutions to suit every need.


If you’re looking for reliable, professional waterproofing services, contact Home Renovations and Repairs today to discuss your project and receive a free quote. Protect your investment and enjoy peace of mind knowing your property is in expert hands.

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