Exterior Waterproofing for Basements

If you are a Homeowner or a renter, you know that water damage can be a nightmare. In particular, basements are prone to moisture issues which can lead to mold, mildew, and even structural damage. Fortunately, exterior waterproofing services can help prevent this type of damage by keeping water out of your home’s basement.

In this article, we will explore specialized exterior waterproofing services designed to keep basements dry and free from water damage. We will cover the following topics:

  1. The Importance of Keeping Basements Dry
  2. Exterior Waterproofing Services
  3. FAQs About Exterior Waterproofing Services
  4. Conclusion

The Importance of Keeping Basements Dry

Basements are an integral part of the House, providing additional living space, storage, and even a place for recreation. However, they are also prone to moisture issues because they are below ground level, close to the water table. Also, if your house is located in an area with frequent rainfall or heavy snow, water can quickly seep into the basement, leading to damage and potential health risks.

The presence of moisture in a basement can lead to the following problems:

  • The growth of mold and mildew, which can cause respiratory problems and other health issues.
  • Structural damage to the house’s foundation and walls.
  • Increased humidity levels in the basement can affect the quality of life of everyone in the house by making it uncomfortable and potentially causing certain medical conditions.

Therefore, it is essential to keep basements dry as much as possible to avoid these problems and maintain a healthy living environment.

Exterior Waterproofing Services

Exterior waterproofing services are designed to keep the moisture outside the basement walls. These services involve excavating the foundation of the house to expose the exterior walls, which are then cleaned, sealed, and covered with a specialized membrane to prevent water from seeping inside. The following are types of specialized exterior waterproofing services:

Excavation and Sealant

Excavation involves digging a trench around your home’s foundation to access the exterior walls and install sealant and protective membranes. This technique is the most effective way of waterproofing your basement because it eliminates moisture from outside the walls and prevents it from penetrating your home’s foundation. The process includes the following steps:

  1. The area around the foundation is excavated using heavy machinery and tools.
  2. The exterior walls are cleaned, Repaired, and leveled to create a smooth surface.
  3. A waterproof membrane is applied to the smooth exterior walls to prevent water from entering your basement.
  4. A drainage system is installed to redirect the water away from the foundation.

Injection Waterproofing

Injection waterproofing is a technique that consists of injecting a sealant into the cracks and crevices of the foundation walls to seal them. It is an effective solution for minor water leaks and moisture issues. The process includes the following steps:

  1. The foundation of the house is surveyed to determine the best spots for injection.
  2. The cracks and crevices are cleaned and dried.
  3. An epoxy or polyurethane sealant is injected into the cracks to seal them.

Coating Waterproofing

Coating waterproofing involves applying a waterproof coating to the exterior walls of the foundation. This technique is an affordable way of preventing water penetration and can be used on brick, concrete, and stone foundations. The process includes the following steps:

  1. The exterior walls of the foundation are cleaned, dried, and prepared for coating.
  2. A waterproof coating, usually made of a rubberized or elastomeric material, is applied to the walls using a roller or sprayer.
  3. A final sealant is applied to the coating to ensure its longevity and effectiveness.

FAQs About Exterior Waterproofing Services

  1. How long does the exterior waterproofing process take?

The answer to this question depends on the type of waterproofing service you choose and the size of your home’s foundation. On average, excavation and sealant waterproofing can take between two and six weeks.

  1. Can exterior waterproofing services be done during the winter?

Yes, it is possible to carry out exterior waterproofing services during the winter. However, the weather conditions may affect the timeline and quality of work.

  1. Will exterior waterproofing services increase the value of my home?

Yes, exterior waterproofing services can increase the value of your home by protecting the foundation from water damage and ensuring the longevity of the structure.

  1. What are some signs that my house needs exterior waterproofing services?

If you notice water seeping into the basement, cracks in the foundation walls, a musty or unpleasant odor in the basement, or dampness and moisture, it’s time to consider exterior waterproofing services.


Water damage can cause significant problems in the basement, leading to mold, mildew, and structural damage. Exterior waterproofing services are an effective way of preventing this damage by keeping water out of your home’s basement. The excavation and sealant, injection waterproofing, and coating waterproofing are specialized services that can help you keep your home’s foundation dry and protected.

Cape Town Waterproofing

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