Basement Waterproofing

Key Takeaways

  • Basement Waterproofing Is Vital for Protecting a Home’s Foundation and Maintaining a Dry, Healthy Living Space
  • Exterior Basement Waterproofing Prevents Water Intrusion by Applying a Membrane and Drainage System Outside the Foundation Walls
  • Interior Basement Waterproofing Tackles Moisture From Within, Using sump pumps and Sealants to Keep the Basement Dry
  • A Comprehensive Waterproofing Approach Addresses Both the Interior and Exterior to Safeguard Against Water Damage
  • Controlling Humidity With Dehumidifiers Inside the Basement Is Crucial for Preventing Mold and Mildew Growth
basement waterproofing seattle


Waterproofing a basement wall is a critical step in protecting a home’s foundation and maintaining a dry, healthy living space. The process often involves the application of a waterproof membrane and a coat of sealant on the exterior walls, effectively creating a robust barrier against groundwater and rain infiltration. This method not only helps in preventing the accumulation of moisture but also guards against the potential growth of mold and mildew.

On the interior, strategies such as the installation of a  and the utilization of waterproof paint or epoxy coatings play a pivotal role. These measures manage any water that might penetrate the outer defenses, channeling it away from the home to keep the basement dry. Expertly addressing both sides of the wall ensures a comprehensive approach to basement waterproofing, ultimately preserving the structural integrity of the property and enhancing indoor air quality.

basement waterproofing seattle


Exterior basement waterproofing is a vital measure to prevent water from making its way into a basement through the foundation. By applying a waterproof membrane around the exterior walls and implementing a drainage system, such as a French drain, it intercepts water before it can reach the basement. This preemptive approach deals directly with the sources of moisture, like soil saturation and surface water runoff, effectively keeping the foundation dry and secure.

Adding layers of protection, such as a coat of durable waterproof paint or installing a vapor barrier, further enhances the basement’s defense against water infiltration. This method, focusing on the exterior, attacks the problem at its root, diverting rainwater and groundwater away from the foundation. The strategic placement of downspouts and the grading of the landscape to direct water away from the building play crucial roles in maintaining a dry basement and protecting the home’s foundation over the long term.


Interior basement waterproofing presents a proactive stance against water damage from within, addressing moisture that has managed to breach the exterior defenses. The process primarily involves the installation of a sump pump system designed to remove water collected in a sump basin, thus preventing basement flooding. Additionally, the strategic placement of dehumidifiers aids in controlling the humidity levels inside, crucial for maintaining a dry and healthy environment.

A comprehensive interior approach also includes the application of waterproof coatings or sealants directly to the basement walls and floor, creating an impermeable layer against moisture penetration. This tactic is essential for combating potential leaks and condensation, especially in areas prone to high groundwater levels or frequent rain:

  • Evaluating the interior space for existing moisture or water damage signs.
  • Choosing appropriate waterproof coatings or sealants for the basement walls and floor.
  • Installing a reliable sump pump system and dehumidifiers as necessary.

Frequently Asked Questions

Common signs signaling the necessity for basement waterproofing include persistent dampness, evident water stains on walls or floors, and the unwelcome presence of mold or mildew emitting a musty odor. Another tell-tale indicator is the occurrence of efflorescence, a white, powdery substance on concrete surfaces, which points to water seeping through.

Basement waterproofing prevents water damage and mold growth by creating a barrier against moisture infiltration, ensuring the basement remains dry and free from the damp conditions that encourage mold proliferation. This process involves various techniques, such as sealing cracks, installing drainage systems, and applying waterproof coatings, effectively mitigating the risk of structural damage and health concerns associated with mold.

Basement waterproofing is a critical aspect of maintaining a home’s integrity, health, and safety. KG Basement Waterproofing Seattle, leveraging over two decades of experience, employs various methods to ensure basements stay dry, healthy, and structurally sound. Among the diverse strategies, the company focuses on both interior and exterior waterproofing techniques, catering to different needs and situations.

Interior basement waterproofing methods are designed to address water issues from inside the home. They often involve the application of sealants on basement walls and floors to prevent moisture from seeping through cracks and joints. For more severe water intrusion, sump pump installations are paramount. These systems effectively collect and redirect water away from the basement, keeping the space dry. Moreover, the addition of dehumidifiers helps to control humidity levels, further protecting against mold and mildew growth.

Exterior basement waterproofing targets water intrusion at its source, outside the home. This approach can include the installation of french drains, which redirect groundwater away from the foundation. Waterproofing membranes may also be applied to the exterior walls of the basement, acting as a robust barrier against moisture. Additionally, measures to manage roof and surface water, such as correcting downspout configurations and improving landscape drainage, are crucial to prevent water from accumulating around the foundation.

KG Basement Waterproofing Seattle also specializes in crawl space waterproofing and encapsulation, a method that involves sealing off crawl spaces with vapor barriers to protect against moisture, improving indoor air quality, and supporting the home’s structural integrity.

The choice between these solutions depends on various factors, including the level of water damage, the home’s construction, and specific customer needs. Each strategy, from sump pump installations to the application of waterproof coatings, is executed with precision, ensuring long-lasting protection against basement flooding and water damage. KG Basement Waterproofing Seattle stands behind its work with robust warranties, demonstrating a commitment to quality and customer satisfaction.

The cost of basement waterproofing by companies like KG Basement Waterproofing Seattle can vary widely, influenced by factors such as the extent of water damage, the basement’s size, and the chosen waterproofing methods, ranging from interior to exterior solutions. Moreover, the type of materials required, like sealants and membranes, and the complexity of installation involving sump pumps or French drains also play a pivotal role in determining the final price.

The duration of a typical basement waterproofing project can vary greatly, usually hinging on the complexity and size of the task at hand. Generally, projects might span from a few days to a couple of weeks, especially when considering factors like the extent of the water damage, the specific waterproofing methods employed, and any additional repairs required.

Get A Free Quotes

    Our Services

    contact Us Today!